STOKED* with TESS: KELT-11b and WASP-127b · 2019. 8. 5. · STOKED* with TESS: KELT-11b...
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STOKED* with TESS: KELT-11b and WASP-127b Ashley Davidson 1 , Maximilian Günther 2,^ , Tansu Daylan 2,x , Rohan Subramani 3 , Néstor Espinoza 4 , Jayshil Patel 5 *STudy of Known Exoplanet re-Discoveries The Transiting Exoplanet Survey Satellite (TESS) has been conducting a search for exoplanets since its launch in April of 2018. Transmission Spectroscopy Metric (TSM) and Emission Spectroscopy Metric (ESM) are two values that characterize a planet’s expected amenability to further atmospheric characterization (Kempton et al., 2018). The highly inflated KELT-11b and WASP-127b are two top Introduction Top 10 TSM year-1 candidates are shown in red Methodology Allesfitter (Günther & Daylan 2019 9 ) provides a means of modelling photometric and radial velocity data using either Markov Chain Monte Carlo (MCMC) or Nested Sampling fits. For each planet, we fit each instrument’s dataset individually to account for red noise and then fix these parameters in the final run of combined datasets in order to determine astrophysical parameters. Acknowledgements KELT-11 b WASP-127 b Results and Discussion Fig. 1: An artist’s interpretation of WASP-127 b Our analyses have produced refined astrophysical parameters for KELT-11b and WASP-127b, as shown in the bottom table. Error values for most parameters showed a decrease, which is particularly important for factors like epoch and period, since they contribute over time to the compounding uncertainty of transit time. Precise measurements for epoch and period will increase efficiency 1 St. Paul’s School, Concord, NH 03301, 2 Department of Physics, and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA, ^ Juan Carlos Torres Fellow, x Kavli Fellow, 3 Yorktown High School, NY 10598, 4 Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany, 5 Sardar Vallabhbhai National Institute of Technology, Surat-7, Gujarat, India 6 Pepper et al., 2017, 7 Lam et al., 2017, 8 Chen et al., 2018, 9 ascl:1903.003 Thank you to Dr. Maximilian Günther and Dr. Tansu Daylan for their supervision, assistance, and mentorship during this incredible research opportunity. I acknowledge Rohan Subramani, Néstor Espinoza, and Jayshil Patel for their related work on STOKED. Data was used from: KELT-11 b 6 WCO, MORC, MINERVA, PEST Observatory, ICO, PvdK, MVRC, HIRES, and APF. WASP-127 b SuperWASP 7 , EulerCam 7 , TRAPPIST 7 , RISE 7 , ZEISS 7 , SOPHIE 7 , CORALIE 7 , OSIRIS 8 Parameter KELT -11 Value KELT -11 1σ Error WASP -127 Value WASP -127 1σ Error R p /R * 0.0545769 0.00037980 0.1018772 0.00044245 (R p +R * )/a 0.2482975 0.00562648 0.1485991 0.00218303 cos(i) 0.1538745 0.00841569 0.0594063 0.0044090 Period (d) 4.7362108 1.304278E-06 4.1780646 1.196365E-06 Epoch (BJD) 2456356.2118 0.00046967 2456559.3615 0.00053697 K (km/s) 0.0185169 0.00198034 0.0216804 0.00225447 Preliminary Results for KELT-11b and WASP-127 b: Green: baseline Red: baseline - model Purple: model 4000 6000 8000 T * [K] 500 1000 1500 2000 2500 T p [K] 1 2 3 4 5 6 7 8 9 10 TSM candidates. This analysis combines new TESS data with previous datasets to provide updated ephemerides to be used for future observations done by the James Webb Space Telescope (JWST) to be launched in 2021. 1: WASP-107 b 2: KELT-11 b 3: WASP-127 b 4: WASP-20 b 5: WASP-94 A b 6: WASP-121 b 7: WASP-101 b 8: WASP-131 b 9: WASP-168 b 10: WASP-62 b for future JWST observations by optimizing the transit time predictions. As shown in the violin plot above for projected transit timing in the year 2023, the inclusion of the TESS data greatly optimizes transit time predictions and minimizes room for error.
Transcript of STOKED* with TESS: KELT-11b and WASP-127b · 2019. 8. 5. · STOKED* with TESS: KELT-11b...
STOKED* with TESS: KELT-11b and WASP-127bAshley Davidson1, Maximilian Günther2,^, Tansu Daylan2,x, Rohan Subramani3,
Néstor Espinoza4, Jayshil Patel5
*STudy of Known Exoplanet re-Discoveries
The Transiting Exoplanet Survey Satellite (TESS) hasbeen conducting a search for exoplanets since itslaunch in April of 2018. Transmission SpectroscopyMetric (TSM) and Emission Spectroscopy Metric(ESM) are two values that characterize a planet’sexpected amenability to further atmosphericcharacterization (Kempton et al., 2018). The highlyinflated KELT-11b and WASP-127b are two top
Introduction
Top 10 TSM year-1 candidates are shown in red
MethodologyAllesfitter (Günther & Daylan 20199) provides ameans of modelling photometric and radialvelocity data using either Markov Chain MonteCarlo (MCMC) or Nested Sampling fits. For eachplanet, we fit each instrument’s datasetindividually to account for red noise and then fixthese parameters in the final run of combineddatasets in order to determine astrophysicalparameters.
Acknowledgements
KELT-11 b WASP-127 b
Results and Discussion
Fig. 1:An artist’s interpretation of WASP-127 b
Our analyses have producedrefined astrophysical parametersfor KELT-11b and WASP-127b, asshown in the bottom table. Errorvalues for most parametersshowed a decrease, which isparticularly important for factorslike epoch and period, since theycontribute over time to thecompounding uncertainty oftransit time. Precisemeasurements for epoch andperiod will increase efficiency
1St. Paul’s School, Concord, NH 03301, 2Department of Physics, and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA, ^Juan Carlos Torres Fellow, xKavli Fellow, 3Yorktown High School, NY 10598, 4Max-Planck-Institut für Astronomie, Königstuhl 17,
69117 Heidelberg, Germany, 5Sardar Vallabhbhai National Institute of Technology, Surat-7, Gujarat, India6 Pepper et al., 2017, 7 Lam et al., 2017, 8Chen et al., 2018, 9ascl:1903.003
Thank you to Dr. Maximilian Günther and Dr. Tansu Daylan for theirsupervision, assistance, and mentorship during this incredible researchopportunity. I acknowledge Rohan Subramani, Néstor Espinoza, andJayshil Patel for their related work on STOKED.
Data was used from:KELT-11 b6 WCO, MORC, MINERVA, PEST Observatory, ICO, PvdK, MVRC, HIRES,and APF.WASP-127 b SuperWASP7, EulerCam7, TRAPPIST7, RISE7, ZEISS7, SOPHIE7,CORALIE7, OSIRIS8
Parameter KELT-11 Value
KELT-11 1σError
WASP-127 Value
WASP-127 1σ Error
Rp/R* 0.0545769 0.00037980 0.1018772 0.00044245
(Rp+R*)/a 0.2482975 0.00562648 0.1485991 0.00218303
cos(i) 0.1538745 0.00841569 0.0594063 0.0044090
Period (d) 4.7362108 1.304278E-06 4.1780646 1.196365E-06
Epoch (BJD) 2456356.2118 0.00046967 2456559.3615 0.00053697
K (km/s) 0.0185169 0.00198034 0.0216804 0.00225447
Preliminary Results for KELT-11b and WASP-127 b:
Green: baselineRed: baseline - modelPurple: model
4000 6000 8000T * [K]
500
1000
1500
2000
2500
Tp
[K]
1
1: WASP-107 b
2
2: KELT-11 b
3
3: WASP-127 b
4
4: WASP-20 b
5
5: WASP-94 A b6
6: WASP-121 b
7
7: WASP-101 b
8
8: WASP-131 b
9
9: WASP-168 b
1010: WASP-62 b
TSM candidates. This analysiscombines new TESS data withprevious datasets to provideupdated ephemerides to beused for future observationsdone by the James WebbSpace Telescope (JWST) to belaunched in 2021.
4000 6000 8000T * [K]
500
1000
1500
2000
2500
Tp
[K]
1
1: WASP-107 b
2
2: KELT-11 b
3
3: WASP-127 b
4
4: WASP-20 b
5
5: WASP-94 A b6
6: WASP-121 b
7
7: WASP-101 b
8
8: WASP-131 b
9
9: WASP-168 b
1010: WASP-62 b
for future JWST observations by optimizing the transit time predictions. Asshown in the violin plot above for projected transit timing in the year 2023, theinclusion of the TESS data greatly optimizes transit time predictions andminimizes room for error.
