The TESS FFIs: Expectations vs. Reality

Extreme Solar Systems IV: Transit Session

Transcript

1. The TESS Full-Frame Images: Expectations vs. Reality Adina Feinstein, Benjamin Montet, Elisa Quintana, Vesselin Kostov, Thomas Barclay, Knicole Colon, Brianna Galgano, Ethan Kruse, Susan Mullally, Joshua Schlieder Extreme Solar Systems IV August 19, 2019 @afeinstein20 !1
2. 1 observing sector contains ~106 stars, but light curves are only released for 20,000 short-cadence targets. !2
3. 1 observing sector contains ~106 stars, but light curves are only released for 20,000 short-cadence targets. Continuous Viewing Zone !2
4. The eleanor pipeline takes the FFIs and completes background subtraction, aperture photometry, and detrending to extract light curves. Feinstein et al. 2019 !3
5. There are several teams in the community producing light curves for stars in the FFIs. Lund et al. 2017 Oelkers & Stassun et al. 2018 !4
6. Barclay et al. 2018 Simulated data predicts ~3,000 new planets will be detected in the FFIs. !5
7. New candidates found within the FFIs generally agree with the simulated predictions. Exoplanet Archive as of August 12, 2019 !6
8. New candidates found within the FFIs generally agree with the simulated predictions. Exoplanet Archive as of August 12, 2019 !6
9. New candidates found within the FFIs generally agree with the simulated predictions. Exoplanet Archive as of August 12, 2019 !6
10. New candidates found within the FFIs generally agree with the simulated predictions. Exoplanet Archive as of August 12, 2019 !6
11. We are not finding as many planets around high- mass and low-mass stars as expected. Exoplanet Archive as of August 12, 2019 !7
12. We are not finding as many planets around high- mass and low-mass stars as expected. Exoplanet Archive as of August 12, 2019 !7
13. We are not finding as many planets around high- mass and low-mass stars as expected. Exoplanet Archive as of August 12, 2019 !7
14. A quick look at the exceptions to the expectations !8
15. A quick look at the exceptions to the expectations !8
16. A quick look at the exceptions to the expectations !8
17. A quick look at the exceptions to the expectations !8
18. A quick look at the exceptions to the expectations !8
19. A quick look at the exceptions to the expectations !8
20. Sullivan et al. 2015 Simulated data predicts ~3,000 new planets will be detected in the FFIs … along with ~800,000 false positives. ¯\_(ツ)_/¯ !9
21. Due to the pixel size of TESS, we have encountered all sorts of false positives. !10 Binned Not binned
22. Due to the pixel size of TESS, we have encountered all sorts of false positives. !10 Binned Not binned
23. Due to the pixel size of TESS, we have encountered all sorts of false positives. !10 Binned Not binned
24. Due to the pixel size of TESS, we have encountered all sorts of false positives. !10 Binned Not binned
25. Checking the light curves from all available pipelines should be one of the first steps in confirming new candidates. !11 Binned Not binned
26. Checking the light curves from all available pipelines should be one of the first steps in confirming new candidates. !11 Binned Not binned
27. The signal originally identified as a new candidate was contamination in the aperture from a nearby star. !12
28. The signal originally identified as a new candidate was contamination in the aperture from a nearby star. !12
29. The signal originally identified as a new candidate was contamination in the aperture from a nearby star. !12
30. The initial target itself has two stars within one TESS pixel and three nearby stars share a similar space. summary DSS image of field !13
31. The initial target itself has two stars within one TESS pixel and three nearby stars share a similar space. summary DSS image of field !13
32. The initial target itself has two stars within one TESS pixel and three nearby stars share a similar space. summary DSS image of field !13
33. Binned Not binned Recovering known TOIs from the QLP with publicly available light curves can yield different results. !14
34. Binned Not binned Recovering known TOIs from the QLP with publicly available light curves can yield different results. !14
35. Binned Not binned Recovering known TOIs from the QLP with publicly available light curves can yield different results. !14
36. Binned Not binned Recovering known TOIs from the QLP with publicly available light curves can yield different results. !14 CHECK ALL AVAILABLE FFI LIGHT CURVES!
37. !15 See Bill Welsh’s talk on Thursday for more details! Data from the FFIs helped fill in the details of a new circumbinary candidate. Transit Eclipse
38. !15 See Bill Welsh’s talk on Thursday for more details! Data from the FFIs helped fill in the details of a new circumbinary candidate. Transit Eclipse
39. !15 See Bill Welsh’s talk on Thursday for more details! Data from the FFIs helped fill in the details of a new circumbinary candidate. Transit Eclipse
40. !15 See Bill Welsh’s talk on Thursday for more details! Data from the FFIs helped fill in the details of a new circumbinary candidate. Transit Eclipse
41. !15 See Bill Welsh’s talk on Thursday for more details! Data from the FFIs helped fill in the details of a new circumbinary candidate. Transit Eclipse
42. Summary •The planet candidates found thus far are generally in good agreement with what we expected. •There seems to be trend towards lack of planets around high-mass stars. •Due to the number of false positives, anybody interested in using the FFIs should be prepared for a lot of human vetting and should use all available light curves to confirm their signals are real. •For more information on the new circumbinary planet see Bill Welsh’s talk on Thursday! @afeinstein20 !16 Image: Ethan Kruse @ethan_kruse
43. Summary •The planet candidates found thus far are generally in good agreement with what we expected. •There seems to be trend towards lack of planets around high-mass stars. •Due to the number of false positives, anybody interested in using the FFIs should be prepared for a lot of human vetting and should use all available light curves to confirm their signals are real. •For more information on the new circumbinary planet see Bill Welsh’s talk on Thursday! @afeinstein20 !16 Image: Ethan Kruse @ethan_kruse