The L 98-59 System: Three Transiting, Terrestrial-size Planets Orbiting a Nearby M Dwarf
| dc.contributor.author | Barclay, Thomas | |
| dc.contributor.author | Mukai, Koji | |
| dc.contributor.author | Pidhorodetska, Daria | |
| dc.contributor.author | et al. | |
| dc.date.accessioned | 2021-01-25T21:13:49Z | |
| dc.date.available | 2021-01-25T21:13:49Z | |
| dc.date.issued | 2019-06-27 | |
| dc.description | Veselin B. Kostov1,2, Joshua E. Schlieder1, Thomas Barclay1,3, Elisa V. Quintana1, Knicole D. Colón1, Jonathan Brande1,4,59, Karen A. Collins5, Adina D. Feinstein6, Samuel Hadden5, Stephen R. Kane7, Laura Kreidberg5, Ethan Kruse1, Christopher Lam1, Elisabeth Matthews8, Benjamin T. Montet6,60, Francisco J. Pozuelos9,10, Keivan G. Stassun11, Jennifer G. Winters5, George Ricker12, Roland Vanderspek12, David Latham5, Sara Seager12,13,14, Joshua Winn15, Jon M. Jenkins16, Dennis Afanasev17, James J. D. Armstrong18, Giada Arney1, Patricia Boyd1, Geert Barentsen19, Khalid Barkaoui10,20, Natalie E. Batalha21, Charles Beichman22, Daniel Bayliss23, Christopher Burke8, Artem Burdanov10, Luca Cacciapuoti24, Andrew Carson1, David Charbonneau5, Jessie Christiansen25, David Ciardi25, Mark Clampin1, Kevin I. Collins26, Dennis M. Conti27, Jeffrey Coughlin2, Giovanni Covone24, Ian Crossfield12, Laetitia Delrez28, Shawn Domagal-Goldman1, Courtney Dressing29, Elsa Ducrot10, Zahra Essack13, Mark E. Everett30, Thomas Fauchez1, Daniel Foreman-Mackey31, Tianjun Gan32, Emily Gilbert6, Michaël Gillon10, Erica Gonzales21, Aaron Hamann6, Christina Hedges19, Hannah Hocutt33, Kelsey Hoffman2, Elliott P. Horch33, Keith Horne34, Steve Howell16, Shane Hynes1, Michael Ireland35, Jonathan M. Irwin5, Giovanni Isopi36, Eric L. N. Jensen37, Emmanuël Jehin9, Lisa Kaltenegger38, John F. Kielkopf39, Ravi Kopparapu1, Nikole Lewis38, Eric Lopez1, Jack J. Lissauer16, Andrew W. Mann40, Franco Mallia36, Avi Mandell1, Rachel A. Matson16, Tsevi Mazeh41, Teresa Monsue1, Sarah E. Moran42, Vickie Moran1, Caroline V. Morley43, Brett Morris44, Philip Muirhead45, Koji Mukai1,3, Susan Mullally46, Fergal Mullally2, Catriona Murray28, Norio Narita47,48,49,50,51, Enric Palle52, Daria Pidhorodetska1, David Quinn1, Howard Relles5, Stephen Rinehart1, Matthew Ritsko1, Joseph E. Rodriguez5, Pamela Rowden53, Jason F. Rowe54, Daniel Sebastian10, Ramotholo Sefako55, Sahar Shahaf41, Avi Shporer12, Naylynn Tañón Reyes1,56, Peter Tenenbaum2,16, Eric B. Ting16, Joseph D. Twicken2,16, Gerard T. van Belle57, Laura Vega1, Jeffrey Volosin1, Lucianne M. Walkowicz58, and Allison Youngblood1 | en_US |
| dc.description.abstract | We report the Transiting Exoplanet Survey Satellite (TESS) discovery of three terrestrial-size planets transiting L 98-59 (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. | en_US |
| dc.description.sponsorship | We thank the referee for the insightful comments that helped us improve this manuscript. This manuscript includes data collected by the TESS mission, which are publicly available from the Mikulski Archive for Space Telescopes (MAST). Funding for the TESS mission is provided by NASA’s Science Mission directorate. We acknowledge the use of TESS Alerts data, as provided by the TESS Science Office. We acknowledge the use of public TESS Alert data from pipelines at the TESS Science Office and at the TESS Science Processing Operations Center. This research has made use of the Exoplanet Follow-up Observation Program website, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. J.G.W. is supported by a grant from the John Templeton Foundation. Acquisition of the CHIRON data and the first epoch of DSSI data was made possible by a grant from the John Templeton Foundation. The opinions expressed in this publication are those of the authors and do not necessarily reflect the views of the John Templeton Foundation. We thank Leonardo Paredes, Hodari James, Rodrigo Hinojosa, and Todd Henry for their work in gathering and processing the CHIRON data, as well as for the management of the CTIO/SMARTS 1.5 m telescope. We are also grateful to the observer support staff at CTIO, at ESO/VLT (for program number 0102.C-0503(A)), and Gemini (for program number GS-2018B-LP-101). This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www. cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC; https://www.cosmos.esa.int/web/ gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. This research made use of observations from the LCOGT network and the AAVSO Photometric All-sky Survey (APASS), funded by the Robert Martin Ayers Sciences Fund and NSF AST-1412587. The research leading to these results has received funding from the European Research Council under the European Union’s Seventh Framework Programme (FP/2007-2013) ERC grant agreement No. 336480, and from the ARC grant for Concerted Research Actions, financed by the Wallonia-Brussels Federation. M.G. and E.J. are FNRS Senior Research Associates. Work by B.T.M. was performed in part under contract with the Jet Propulsion Laboratory (JPL) funded by NASA through the Sagan Fellowship Program executed by the NASA Exoplanet Science Institute. This work is partly supported by JSPS KAKENHI grant Nos. JP18H01265 and 18H05439, and JST PRESTO grant No. JPMJPR1775. K.H. acknowledges support from STFC grant ST/R000824/1. | en_US |
| dc.description.uri | https://iopscience.iop.org/article/10.3847/1538-3881/ab2459 | en_US |
| dc.format.extent | 25 pages | en_US |
| dc.genre | journal articles | en_US |
| dc.identifier | doi:10.13016/m2u3qm-osgx | |
| dc.identifier.citation | Barclay, Thomas; Mukai, Koji; Pidhorodetska, Daria; et al.; The L 98-59 System: Three Transiting, Terrestrial-size Planets Orbiting a Nearby M Dwarf; The Astronomical Journal, Volume 158, Number 1 (2019); https://iopscience.iop.org/article/10.3847/1538-3881/ab2459 | en_US |
| dc.identifier.uri | https://doi.org/10.3847/1538-3881/ab2459 | |
| dc.identifier.uri | http://hdl.handle.net/11603/20610 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | IOP Publishing | en_US |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Center for Space Sciences and Technology | |
| dc.relation.ispartof | UMBC Faculty Collection | |
| dc.relation.ispartof | UMBC Staff Collection | |
| dc.relation.ispartof | UMBC Physics Department | |
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| dc.rights | Public Domain Mark 1.0 | * |
| dc.rights | This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law. | |
| dc.rights.uri | http://creativecommons.org/publicdomain/mark/1.0/ | * |
| dc.title | The L 98-59 System: Three Transiting, Terrestrial-size Planets Orbiting a Nearby M Dwarf | en_US |
| dc.type | Text | en_US |