Report
The L 98-59 System: Three Transiting, Terrestrial-size Planets Orbiting a Nearby M Dwarf
| العنوان: | The L 98-59 System: Three Transiting, Terrestrial-size Planets Orbiting a Nearby M Dwarf |
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| المؤلفون: | Veselin B Kostov, Joshua E Schlieder, Thomas Barclay, Elisa V Quintana, Knicole D Colon, Jonathan Brande, Karen A. Collins, Adina D. Feinstein, Samuel Hadden, Stephen R. Kane, Laura Kreidberg, Ethan Kruse, Christopher Lam, Elisabeth Matthews, Benjamin T. Montet, Francisco J. Pozuelos, Keivan G. Stassun, Jennifer G. Winters, George R Ricker, Roland Vanderspek, David W. Latham, Sara Seager, Joshua Winn, Jon M Jenkins, Dennis Afanasev, James D Armstrong, Giada N Arney, Patricia Boyd, Geert Barentsen, Khalid Barkaoui, Natalie E. Batalha, Charles A Beichman, Daniel Bayliss, Christopher Burke, Artem Burdanov, Luca Cacciapuoti, Andrew Carson, David Charbonneau, Jessie Christiansen, David R Ciardi, Mark Clampin, Kevin I Collins, Dennis M. Conti, Jeffrey Langer Coughlin, Giovanni Covone, Ian Crossfield, Laetitia Delrez, Shawn David Domagal-goldman, Courtney Dressing, Elsa Ducrot, Zahra Essack, Mark E. Everett, Thomas Fauchez, Daniel Foreman-Mackey, Tianjun Gan, Emily Anne Gilbert, Michaël Gillon, Erica Gonzales, Aaron Hamann, Christina Louise Hedges, Hannah Hocutt, Kelsey Hoffman, Elliott P. Horch, Keith Horne, Steve B Howell, Shane Joseph Hynes, Michael Ireland, Jonathan M. Irwin, Giovanni Isopi, Eric L. N. Jensen, Emmanuël Jehin, Lisa Kaltenegger, John F. Kielkopf, Ravi Kumar Kopparapu, Nikole Lewis, Eric David Lopez, Jack J Lissauer, Andrew W. Mann, Franco Mallia, Avram Mandell, Rachel A. Matson, Tsevi Mazeh, Teresa A Monsue, Sarah E. Moran, Vickie Moran, Caroline V. Morley, Brett Morris, Philip Muirhead, Koji Mukai, Susan Elizabeth Mullally, Fergal Mullally, Catriona Murray, Norio Narita, Enric Palle, Daria Pidhorodetska, David Quinn, Howard Relles, Stephen A Rinehart, Matthew Ritsko, Joseph E. Rodriguez, Pamela Rowden, Jason F. Rowe, Daniel Sebastian, Ramotholo Sefako, Sahar Shahaf, Avi Shporer, Naylynn Tañón Reyes, Peter Gregory Tenenbaum, Eric Bi-wen Ting, Joseph D Twicken, Gerard T. van Belle, Laura Vega, Jeffrey Francis Volosin, Lucianne M Walkowicz, Allison Youngblood |
| المصدر: | The Astronomical Journal. 158(1) |
| بيانات النشر: | United States: NASA Center for Aerospace Information (CASI), 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Astronomy |
| الوصف: | We report the Transiting Exoplanet Survey Satellite (TESS) discovery of three terrestrial-size planets transiting L98-59 (TOI-175, TIC 307210830)—a bright M dwarf at a distance of 10.6 pc. Using the Gaia-measured distance and broadband photometry, we find that the host star is an M3 dwarf. Combined with the TESS transits from three sectors, the corresponding stellar parameters yield planet radii ranging from 0.8 R⊕ to 1.6 R⊕. All three planets have short orbital periods, ranging from 2.25 to 7.45 days with the outer pair just wide of a 2:1 period resonance. Diagnostic tests produced by the TESS Data Validation Report and the vetting package DAVE rule out common false-positive sources. These analyses, along with dedicated follow-up and the multiplicity of the system, lend confidence that the observed signals are caused by planets transiting L 98-59 and are not associated with other sources in the field. The L 98-59 system is interesting for a number of reasons: the host star is bright (V =11.7 mag, K = 7.1 mag) and the planets are prime targets for further follow-up observations including precision radial-velocity mass measurements and future transit spectroscopy with the James Webb Space Telescope; the near-resonant configuration makes the system a laboratory to study planetary system dynamical evolution; and three planets of relatively similar size in the same system present an opportunity to study terrestrial planets where other variables (age, metallicity, etc.) can be held constant. L 98-59 will be observed in four more TESS sectors, which will provide a wealth of information on the three currently known planets and have the potential to reveal additional planets in the system. |
| نوع الوثيقة: | Report |
| اللغة: | English |
| تدمد: | 1538-3881 0004-6256 |
| DOI: | 10.3847/1538-3881/ab2459 |
| URL الوصول: | https://ntrs.nasa.gov/citations/20205000887 |
| ملاحظات: | 80GSFC17M0002 GS-2018B-LP-101 ESO/VLT 0102.C-0503(A) NSF AST-1412587 ERC 336480 JSPS KAKENHI 18H05439 JSPS KAKENHI JP18H01265 JST PRESTO JPMJPR1775 |
| رقم الانضمام: | edsnas.20205000887 |
| قاعدة البيانات: | NASA Technical Reports |
Full Text Finder | تدمد: | 15383881 00046256 |
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| DOI: | 10.3847/1538-3881/ab2459 |