학술논문
Two Massive Jupiters in Eccentric Orbits from the TESS Full Frame Images
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Working Paper
Author
Ikwut-Ukwa, Mma; Rodriguez, Joseph E.; Quinn, Samuel N.; Zhou, George; Vanderburg, Andrew; Ali, Asma; Bunten, Katya; Gaudi, B. Scott; Latham, David W.; Howell, Steve B.; Huang, Chelsea X.; Bieryla, Allyson; Collins, Karen A.; Carmichael, Theron W.; Rabus, Markus; Eastman, Jason D.; Collins, Kevin I.; Tan, Thiam-Guan; Schwarz, Richard P.; Myers, Gordon; Stockdale, Chris; Kielkopf, John F.; Radford, Don J.; Oelkers, Ryan J.; Jenkins, Jon M.; Ricker, George R.; Seager, Sara; Vanderspek, Roland K.; Winn, Joshua N.; Burt, Jennifer; Butler, R. Paul; Calkins, Michael L.; Crane, Jeffrey D.; Gnilka, Crystal L.; Esquerdo, Gilbert A.; Fong, Wlliam; Kreidberg, Laura; Mink, Jessica; Rodriguez, David R.; Schlieder, Joshua E.; Schectman, Stephen; Shporer, Avi; Teske, Johanna; Ting, Eric B.; Villasenor, Jesus Noel; Yahalomi, Daniel A.
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Subject
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Abstract
We report the discovery of two short-period massive giant planets from NASA's Transiting Exoplanet Survey Satellite (TESS). Both systems, TOI-558 (TIC 207110080) and TOI-559 (TIC 209459275), were identified from the 30-minute cadence Full Frame Images and confirmed using ground-based photometric and spectroscopic follow-up observations from TESS's Follow-up Observing Program Working Group. We find that TOI-558 b, which transits an F-dwarf ($M_{*}=1.349^{+0.064}_{-0.065}\ M_{\odot}$, $R_{*}=1.496^{+0.042}_{-0.040}\ R_{\odot}$, $T_{eff}=6466^{+95}_{-93}\ K$, age $1.79^{+0.91}_{-0.73}\ Gyr$) with an orbital period of 14.574 days, has a mass of $3.61\pm0.15\ M_{\rm J}$, a radius of $1.086^{+0.041}_{-0.038}\ R_{\rm J}$, and an eccentric (e=$0.300^{+0.022}_{-0.020}$) orbit. TOI-559 b transits a G-dwarf ($M_{*}=1.026\pm0.057\ M_{\odot}$, $R_{*}=1.233^{+0.028}_{-0.026}\ R_{\odot}$, $T_{eff}=5925^{+85}_{-76}\ K$, age $6.8^{+2.5}_{-2.0}\ Gyr$) in an eccentric (e=$0.151\pm0.011$) 6.984-day orbit with a mass of $6.01^{+0.24}_{-0.23}\ M_{\rm J}$ and a radius of $1.091^{+0.028}_{-0.025}\ R_{\rm J}$. Our spectroscopic follow-up also reveals a long-term radial velocity trend for TOI-559, indicating a long-period companion. The statistically significant orbital eccentricity measured for each system suggests that these planets migrated to their current location through dynamical interactions. Interestingly, both planets are also massive ($>3\ M_{\rm J}$), adding to the population of massive giant planets identified by TESS. Prompted by these new detections of high-mass planets, we analyzed the known mass distribution of hot and warm Jupiters but find no significant evidence for multiple populations. TESS should provide a near magnitude-limited sample of transiting hot Jupiters, allowing for future detailed population studies.
Comment: 18 pages, 7 figures, 5 tables, accepted to The Astronomical Journal
Comment: 18 pages, 7 figures, 5 tables, accepted to The Astronomical Journal