presupernovae as powerful neutrino sources
DESCRIPTION
Presupernovae as powerful neutrino sources. detectable by next neutrino experiments M. Kutschera, A. Odrzywołek, M. Misiaszek Ustroń 2009. Neutrino astrophysics group Institute of Physics, Jagellonian University, Kraków, Poland: A.Odrzywołek, M. Misiaszek, M.K. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/1.jpg)
Presupernovae as powerful neutrino sources
detectable by next neutrino experiments
M. Kutschera, A. Odrzywołek, M. Misiaszek
Ustroń 2009
![Page 2: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/2.jpg)
• Neutrino astrophysics group• Institute of Physics, Jagellonian
University, Kraków, Poland:A.Odrzywołek, M. Misiaszek, M.K.
References to our papers: arXivNeutrino spectra available at
![Page 3: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/3.jpg)
• Research summary:• Spectra of neutrinos from stars at late stages
of thermonuclear burning (presupernovae) are found
• This allows us to predict counting rates in various neutrino detectors
• Presupernovae seem to be detectable by next generation of neutrino detectors
![Page 4: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/4.jpg)
• Stars with initial mass (ZAMS) M>9Msol
after red giant phase:– ignite carbon– develope iron core – end life as core-collapse supernovae– example: 15 Msol :
![Page 5: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/5.jpg)
![Page 6: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/6.jpg)
Nearby candidate:
- Betelgeuse in ORION constellation
- distance 130 pc
![Page 7: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/7.jpg)
![Page 8: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/8.jpg)
• After carbon ignition neutrino-cooled stars• Photon luminosity much less L<<Lν
than neutrino luminosity.-photon luminosity constant after carbon ignition-neutrino luminosity grows by many orders!
![Page 9: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/9.jpg)
![Page 10: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/10.jpg)
Strong temperature growth in the core
![Page 11: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/11.jpg)
Can neutrino experiments detect presupernovae?
![Page 12: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/12.jpg)
• Pair annihilation dominant• Antineutrino flux from pair annihilation crucial !• Different than for the Sun (only neutrinos)
![Page 13: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/13.jpg)
![Page 14: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/14.jpg)
![Page 15: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/15.jpg)
High density – neutrino and antineutrino spectra differ
![Page 16: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/16.jpg)
![Page 17: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/17.jpg)
![Page 18: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/18.jpg)
![Page 19: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/19.jpg)
![Page 20: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/20.jpg)
• Near the collapse:– Total flux grows as Lν ~Tc
9
– Mean neutrino energy grows
![Page 21: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/21.jpg)
![Page 22: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/22.jpg)
Predictions for various detectors
![Page 23: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/23.jpg)
![Page 24: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/24.jpg)
![Page 25: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/25.jpg)
![Page 26: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/26.jpg)
![Page 27: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/27.jpg)
![Page 28: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/28.jpg)
• Range one day before collapse (various detectors)
![Page 29: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/29.jpg)
Presupernova neutrinos vs geoneutrinos
![Page 30: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/30.jpg)
• Nuclear reactions produce more neutrinos νe
than pair annihilation • More than 1000 nuclei must be included
![Page 31: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/31.jpg)
Weak nuclear reactions: neutrinos excess
![Page 32: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/32.jpg)
Comparison with solar neutrinos
![Page 33: Presupernovae as powerful neutrino sources](https://reader035.vdocument.in/reader035/viewer/2022070421/56816071550346895dcf992a/html5/thumbnails/33.jpg)
REAL NEUTRINO ASTRONOMY
STARTS