2006 sq 372 : a planetary interloper from the inner oort cloud n. kaib, a. becker, l. jones...
Post on 22-Dec-2015
217 views
TRANSCRIPT
![Page 1: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/1.jpg)
2006 SQ372: A Planetary Interloper from the Inner Oort Cloud
N. Kaib, A. Becker, L. Jones
University of Washington
![Page 2: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/2.jpg)
25000 AU• LPCs near Earth only constrain outer Oort Cloud
• LPCs beyond Saturn will sample inner Oort Cloud as well
LPCs and Oort Cloud
a > 20,000 AUa > 1,000 AU~
![Page 3: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/3.jpg)
SDSS-II SN Survey Observations2006 SQ372
![Page 4: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/4.jpg)
SDSS-II SN Survey Observations2006 SQ372
![Page 5: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/5.jpg)
SDSS-II SN Survey Observations2006 SQ372
![Page 6: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/6.jpg)
SDSS-II SN Survey Observations2006 SQ372
![Page 7: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/7.jpg)
Orbit Summary
a = 796 AU q = 24.2 AU i = 19.5°
![Page 8: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/8.jpg)
Orbital Evolution
Current orbit is transient - unstable after ~200 Myrs!
![Page 9: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/9.jpg)
Two Different Origin Scenarios1. Scattered Disk
sem
imaj
or
axis
perihelion
x
![Page 10: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/10.jpg)
Two Different Origin Scenarios2. Oort Cloud
sem
imaj
or
axis
perihelion
x
OC
SD
![Page 11: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/11.jpg)
Simulations
Scattered Disk
• 2,500 particles
• Orbit distributions based on SDO observations
• Run for 4.5 Gyrs
Oort Cloud
• 106 particles
• Orbit distributions based on Kaib & Quinn (2008) sims
• Run for 1.4 Gyrs
Non-symplectic variable timestep integrator based on SWIFT (Levison & Duncan, 1994; Kaib & Quinn, 2008)
![Page 12: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/12.jpg)
Results – OC Sim. (10° < i < 30°)
![Page 13: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/13.jpg)
Fractional Occupation Map
X2006 SQ372
10° < i < 30°
![Page 14: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/14.jpg)
fOC/fSD Map
SQ372
For 2006 SQ372: fOC/fSD 0.7
![Page 15: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/15.jpg)
Origin Implications
ProbOC/ProbSD = (fOC/fSD) x (NOC/NSD)
fOC/fSD 0.7
NOC = 2 x 1011 (Neslusan, 2007)
NSD = 4 x 109 (Fernandez, 2004)
ProbOC/ProbSD > 35~
![Page 16: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/16.jpg)
Origin Implications
• 2006 SQ372 is at least 35 times more likely to come from the Oort Cloud compared to the Scattered Disk
• Which region of the Oort Cloud?
![Page 17: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/17.jpg)
Inner Oort Cloud Origin
Semimajor axis drawdown time
vs.
Perihelion drift time
q = -10 AU Ejection by Saturnq = 10 AU a is fixed
![Page 18: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/18.jpg)
Inner Oort Cloud Origin
tq ~ a-2
ta ~ 100 Myrs
Sampled by Known LPCs
(~2.5%)
a < 800 AU20 AU < q < 30 AU
![Page 19: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/19.jpg)
Conclusions
• 2006 SQ372 and 2000 OO67 (Elliot et al. 2005) are first detected members of inner Oort Cloud population inside planetary region
• Pan-STARRS, LSST will discover 100’s to 1000’s of similar bodies
• Population statistics can provide clues about Oort Cloud and Sun’s dynamical history
![Page 20: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/20.jpg)
20
SDSS Stripe 82 N S
RA = 20 hr 120° RA = 4hr
D = +1.25°
D = -1.25°
2
.5°
SDSS Supernova Survey
• Sept-Nov 2005-2007• 300 square degrees, every 2 nights• 5-band photometry• Spectroscopic followup
![Page 21: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/21.jpg)
Nov 2006; Single Epoch
![Page 22: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/22.jpg)
Nov 2006; Quadratic Links
![Page 23: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/23.jpg)
Nov 2006; Verified by Orbit Fitting
![Page 24: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/24.jpg)
2006 SQ372
• 1 of 63 TNOs observed by SDSS-II SN Survey
• Diameter < 100 km
• Orbit:– q: 24.2 AU (between Uranus and Neptune)– a: 796 AU (largest of all TNOs)– i: 20°
![Page 25: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/25.jpg)
Results (10° < i < 30°)
![Page 26: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/26.jpg)
Results (10° < i < 30°)
![Page 27: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/27.jpg)
Results (10° < i < 30°)
![Page 28: 2006 SQ 372 : A Planetary Interloper from the Inner Oort Cloud N. Kaib, A. Becker, L. Jones University of Washington](https://reader030.vdocument.in/reader030/viewer/2022032704/56649d7a5503460f94a5e650/html5/thumbnails/28.jpg)
Results (10° < i < 30°)