![Page 1: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/1.jpg)
Ages for dwarfs and giantsfrom asteroseismology
Bad Honnef, June 1st 2015
Summary of the previous meeting
Víctor Silva Aguirre!Aldo Serenelli
![Page 2: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/2.jpg)
Introduction
![Page 3: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/3.jpg)
Introduction
❖ Revolution: seismic data for thousands of field stars!
❖ Seismic stellar parameters for galactic archaeology!
❖ How is it done?!
❖ Which observables are used?!
❖ What are they sensitive to?!
❖ How good are the seismic stellar properties?
![Page 4: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/4.jpg)
Disclaimer
![Page 5: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/5.jpg)
Disclaimer
❖ BAyesian STellar Algorithm: BASTA!
❖ Bellaterra Stellar Properties Pipeline: BeSPP Serenelli et al. 2013,MNRAS
Silva Aguirre et al. 2015, MNRAS
Under the hood:
![Page 6: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/6.jpg)
Disclaimer
❖ BAyesian STellar Algorithm: BASTA!
❖ Bellaterra Stellar Properties Pipeline: BeSPP Serenelli et al. 2013,MNRAS
Silva Aguirre et al. 2015, MNRAS
Under the hood:
❖ Exoplanet host stars: !
❖ Dwarfs and subgiants: !
❖ Red giants: SAGA, APOKASC!
❖ Gyrochronology:
Reference stellar properties for:Silva Aguirre et al. 2015, MNRAS, etc…
Chaplin et al. 2014, ApJS
Casagrande et al. 2014, ApJ
Pinsonneault et al. 2014, ApJS
van Saders et al. 2015, in prep
![Page 7: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/7.jpg)
Disclaimer
❖ BAyesian STellar Algorithm: BASTA!
❖ Bellaterra Stellar Properties Pipeline: BeSPP Serenelli et al. 2013,MNRAS
Silva Aguirre et al. 2015, MNRAS
❖ Work with GARSTEC and BaSTI grids of models !
❖ Flexible input: averages, individual freqs., combinations…!
❖ Rev. Bayes in the core: priors, weighting, etc…
The basics:
Under the hood:
![Page 8: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/8.jpg)
Asteroseismic dataHow does the seismic trick works:
![Page 9: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/9.jpg)
Asteroseismic dataHow does the seismic trick works:
❖ The bare minimum: scaling relations (dwarfs and giants)
![Page 10: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/10.jpg)
Asteroseismic dataHow does the seismic trick works:
❖ The bare minimum: scaling relations (dwarfs and giants)
❖ Improvements: individual frequencies (dwarfs for now)
![Page 11: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/11.jpg)
Asteroseismic dataHow does the seismic trick works:
❖ The bare minimum: scaling relations (dwarfs and giants)
❖ Improvements: individual frequencies (dwarfs for now)
❖ Improvements: period spacing (giants)
![Page 12: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/12.jpg)
Asteroseismic dataHow does the seismic trick works:
❖ The bare minimum: scaling relations (dwarfs and giants)
❖ Improvements: individual frequencies (dwarfs for now)
❖ Improvements: period spacing (giants)
Always need Teff and [Fe/H]
![Page 13: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/13.jpg)
The problem at hand
e.g., Nordström et al. 2004, A&A
Dwarfs:
![Page 14: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/14.jpg)
The problem at hand
e.g., Nordström et al. 2004, A&A
Dwarfs:
![Page 15: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/15.jpg)
The problem at hand
e.g., Nordström et al. 2004, A&A
Dwarfs:
![Page 16: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/16.jpg)
Asteroseismic dataHow does the seismic trick works:
❖ The bare minimum: scaling relations (dwarfs and giants)!
❖ Improvements: individual frequencies (dwarfs for now)!
❖ Improvements: period spacing (giants)
Always need Teff and [Fe/H]
![Page 17: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/17.jpg)
Asteroseismic data
νmax
![Page 18: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/18.jpg)
Asteroseismic data
νmax
∆ν
![Page 19: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/19.jpg)
Asteroseismic data
∆ν, νmax -> sensitive to #the mass and radius
of the star (p-modes)
νmax
∆ν
![Page 20: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/20.jpg)
The scaling relations
e.g. Basu et al. 2010, ApJGai et al. 2011, ApJ
Silva Aguirre et al. 2013, ApJ Chaplin et al. 2014, ApJS
In the following we trust:
![Page 21: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/21.jpg)
The scaling relations
e.g. Basu et al. 2010, ApJGai et al. 2011, ApJ
Silva Aguirre et al. 2013, ApJ Chaplin et al. 2014, ApJS
In the following we trust:
Ulrich 1986, ApJ
Kjeldsen & Bedding 1995, PASP
![Page 22: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/22.jpg)
The scaling relations
e.g. Basu et al. 2010, ApJGai et al. 2011, ApJ
Silva Aguirre et al. 2013, ApJ Chaplin et al. 2014, ApJS
In the following we trust:
Ulrich 1986, ApJ
Kjeldsen & Bedding 1995, PASP
Why?
![Page 23: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/23.jpg)
Predictive power?
Huber et al. 2011, ApJ
![Page 24: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/24.jpg)
Dwarf starsThe bare minimum:
Chaplin et al. 2014, ApJS
Temperature Composition
Δν νmax
Bayesian Magic
(BASTA, BeSPP)
Stellar Properties(R, M, Age, etc)
![Page 25: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/25.jpg)
Dwarf stars
Chaplin et al. 2014, ApJS
Radii ~2.2%Mass ~5.5%Age ~25%
The bare minimum:
![Page 26: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/26.jpg)
Asteroseismic dataHow does the seismic trick works:
❖ The bare minimum: scaling relations (dwarfs and giants)!
❖ Improvements: individual frequencies (dwarfs for now)!
❖ Improvements: period spacing (giants)
Always need Teff and [Fe/H]
![Page 27: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/27.jpg)
Dwarf starsIndividual frequencies:
![Page 28: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/28.jpg)
Dwarf stars
Davies et al. 2015, in prep.
Can we do better:
![Page 29: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/29.jpg)
Individual FrequenciesModelData
l=0l=2l=1
![Page 30: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/30.jpg)
Dwarf stars
![Page 31: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/31.jpg)
Dwarf stars
![Page 32: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/32.jpg)
Dwarf stars
❖ Cannot properly follow convection in 1D stellar models!
❖ Theoretical frequencies suffer from “surface effect”!
❖ Use combinations that cancel contribution from outer layers!
❖ Sensitive to the core (we understand it better)
![Page 33: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/33.jpg)
Dwarf stars
ModelData
Temperature Composition frequencies
(combinations)
Bayesian Magic
(BASTA, BeSPP)
Stellar Properties(R, M, Age, etc)
![Page 34: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/34.jpg)
Dwarf stars
Radii ~1.1%Masses ~3.3%Ages ~14%
Precision from frequency combinations:
see also: Lebreton & Goupil 2014, A&A
Silva Aguirre et al. 2015, MNRAS
![Page 35: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/35.jpg)
Dwarf starsScaling v/s individual frequencies:
Ages ~14%33 stars
Ages ~25% ~580 stars
Chaplin et al. 2011, Science Silva Aguirre et al. 2015, MNRAS
![Page 36: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/36.jpg)
Dwarf starsScaling v/s individual frequencies:
Chaplin et al. 2011, Science Silva Aguirre et al. 2015, in prep
Ages ~25% ~580 stars
Ages ~14%64 stars
![Page 37: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/37.jpg)
Dwarf starsScaling v/s individual frequencies:
Silva Aguirre et al. 2015, MNRAS
Systematics below the statistical
uncertainties(Note: Δν from
individual frequencies)
![Page 38: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/38.jpg)
The problem at handGiants:
![Page 39: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/39.jpg)
The problem at handGiants:
![Page 40: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/40.jpg)
Red giantsExample: spectroscopy
Data courtesy of A. Serenelli
![Page 41: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/41.jpg)
Asteroseismic dataHow does the seismic trick works:
❖ The bare minimum: scaling relations (dwarfs and giants)!
❖ Improvements: individual frequencies (dwarfs for now)!
❖ Improvements: period spacing (giants)
Always need Teff and [Fe/H]
![Page 42: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/42.jpg)
The bare minimum
![Page 43: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/43.jpg)
The bare minimum
![Page 44: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/44.jpg)
The bare minimum
![Page 45: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/45.jpg)
The bare minimum
![Page 46: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/46.jpg)
Red giantsExample: spectroscopy
Data courtesy of A. Serenelli
![Page 47: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/47.jpg)
Red giants
Huber et al. 2013, Science
Note separation in l=1 modes
![Page 48: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/48.jpg)
Red giants
Two distinct sequences according to evolutionary stage
Clump
RGB
Bedding et al. 2011, Nature
![Page 49: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/49.jpg)
Red giantsi.e. SAGA (also APOKASC this year):
Data courtesy of A. Serenelli
![Page 50: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/50.jpg)
Red giantsWhat we can obtain for giants (i.e. SAGA):
Casagrande et al. 2014, ApJ
![Page 51: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/51.jpg)
Red giantsWhat we can obtain for giants (i.e. SAGA):
Casagrande, Silva Aguirre, Schlesinger, et al. 2015, Submitted
![Page 52: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/52.jpg)
Red giantsWhat we can obtain for giants (i.e. SAGA):
Casagrande, Silva Aguirre, Schlesinger, et al. 2015, Submitted
![Page 53: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/53.jpg)
Red giantsWhat we can obtain for giants (i.e. SAGA):
❖ Stellar radius ~2%!❖ Stellar mass ~6%!❖ Stellar age ~20%
![Page 54: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/54.jpg)
Red giantsWhat we can obtain for giants (i.e. SAGA):
❖ Stellar radius ~2%!❖ Stellar mass ~6%!❖ Stellar age ~20%
Can we improve?
![Page 55: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/55.jpg)
Asteroseismic dataHow does the seismic trick works:
❖ The bare minimum: scaling relations (dwarfs and giants)!
❖ Improvements: individual frequencies (dwarfs for now)!
❖ Improvements: period spacing (giants)
Always need Teff and [Fe/H]
![Page 56: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/56.jpg)
Red giants
Two distinct sequences according to evolutionary stage
Clump
RGB
Bedding et al. 2011, Nature
![Page 57: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/57.jpg)
The added dimension
i.e. SAGA
![Page 58: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/58.jpg)
The added dimension
![Page 59: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/59.jpg)
The added dimension
![Page 60: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/60.jpg)
Conclusions
![Page 61: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/61.jpg)
Conclusions
❖ Ages to ~15% (dwarfs) and ~20% (giants)
![Page 62: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/62.jpg)
Conclusions
❖ Ages to ~15% (dwarfs) and ~20% (giants)
❖ OK in dwarfs, need to work a bit more on giants
![Page 63: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/63.jpg)
Conclusions
❖ Ages to ~15% (dwarfs) and ~20% (giants)
❖ OK in dwarfs, need to work a bit more on giants
❖ Validation of scaling relations are necessary
![Page 64: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/64.jpg)
Conclusions
❖ Ages to ~15% (dwarfs) and ~20% (giants)
❖ OK in dwarfs, need to work a bit more on giants
❖ Validation of scaling relations are necessary
❖ Improvements: period spacings, use full PDFs
![Page 65: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/65.jpg)
Conclusions
❖ Ages to ~15% (dwarfs) and ~20% (giants)
❖ OK in dwarfs, need to work a bit more on giants
❖ Validation of scaling relations are necessary
❖ Improvements: period spacings, use full PDFs
❖ We need to get a handle on mass-loss
![Page 66: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/66.jpg)
Conclusions
❖ Ages to ~15% (dwarfs) and ~20% (giants)
❖ OK in dwarfs, need to work a bit more on giants
❖ Validation of scaling relations are necessary
❖ Improvements: period spacings, use full PDFs
❖ We need to get a handle on mass-loss
❖ Future looks bright: K2, TESS, PLATO
![Page 67: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/67.jpg)
Conclusions
❖ Ages to ~15% (dwarfs) and ~20% (giants)
❖ OK in dwarfs, need to work a bit more on giants
❖ Validation of scaling relations are necessary
❖ Improvements: period spacings, use full PDFs
❖ We need to get a handle on mass-loss
❖ Future looks bright: K2, TESS, PLATO
❖ Asteroseismology can deliver!
![Page 68: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/68.jpg)
Conclusions
Casagrande, Silva Aguirre, Schlesinger, et al. 2015, Submitted
Seismic age-metallicity relation (SAGA):
![Page 69: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/69.jpg)
Ages for dwarfs and giantsfrom asteroseismology
Bad Honnef, June 1st 2015
Summary of the previous meeting
Víctor Silva Aguirre!Aldo Serenelli
![Page 70: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/70.jpg)
AppendixSystematic uncertainties (dwarfs)
❖ Radius ~1.1%!
❖ Mass ~3.3%!
❖ Age ~14%
Statistical Physics
❖ Radius ~0.7%!
❖ Mass ~2.3%!
❖ Age ~9.6%
Fitting Algo.
❖ Radius ~1.6%!
❖ Mass ~3.6%!
❖ Age ~16.8%
![Page 71: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/71.jpg)
Silva Aguirre, Casagrande, et al. 2012, ApJ
2.3 ± 1.8%
Appendix22 dwarfs with accurate parallaxes
![Page 72: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/72.jpg)
Huber et al. 2012, ApJ 2.0 ± 4.8%
Appendix10 stars with interferometric measurements
![Page 73: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/73.jpg)
Appendix
Johnson et al. 2014, ApJ
![Page 74: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/74.jpg)
Appendix
Courtesy of A. Serenelli
![Page 75: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/75.jpg)
Appendix
Kallinger et al. 2012, A&A
![Page 76: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/76.jpg)
Individual frequencies?
![Page 77: Ages for dwarfs and giants - Meetings (Indico) · 2015-06-29 · Improvements: period spacing (giants) Always need Teff and [Fe/H] The bare minimum. The bare minimum. The bare minimum](https://reader034.vdocument.in/reader034/viewer/2022042101/5e7e5e91cb5ab63e007834d2/html5/thumbnails/77.jpg)
Appendix
Dogan et al. 2013, ApJ