The L 98-59 system: three transiting, terrestrial-size planets orbiting a nearby M dwarf

Date Issued
2019-07Publisher Version
10.3847/1538-3881/ab2459Author(s)
Kostov, Veselin B.
Schlieder, Joshua E.
Barclay, Thomas
Quintana, Elisa V.
Colón, Knicole D.
Brande, Jonathan
Collins, Karen A.
Feinstein, Adina D.
Hadden, Samuel
Kane, Stephen R.
Kreidberg, Laura
Kruse, Ethan
Lam, Christopher
Matthews, Elisabeth
Montet, Benjamin T.
Pozuelos, Francisco J.
Stassun, Keivan G.
Winters, Jennifer G.
Ricker, George
Vanderspek, Roland
Latham, David
Seager, Sara
Winn, Joshua
Jenkins, Jon M.
Afanasev, Dennis
Armstrong, James J.D.
Arney, Giada
Boyd, Patricia
Barentsen, Geert
Barkaoui, Khalid
Batalha, Natalie E.
Beichman, Charles
Bayliss, Daniel
Burke, Christopher
Burdanov, Artem
Cacciapuoti, Luca
Carson, Andrew
Charbonneau, David
Christiansen, Jessie
Ciardi, David
Clampin, Mark
Collins, Kevin I.
Conti, Dennis M.
Coughlin, Jeffrey
Covone, Giovanni
Crossfield, Ian
Delrez, Laetitia
Domagal-Goldman, Shawn
Dressing, Courtney
Ducrot, Elsa
Essack, Zahra
Everett, Mark E.
Fauchez, Thomas
Foreman-Mackey, Daniel
Gan, Tianjun
Gilbert, Emily
Gillon, Michaël
Gonzales, Erica
Hamann, Aaron
Hedges, Christina
Hocutt, Hannah
Hoffman, Kelsey
Horch, Elliott P.
Horne, Keith
Howell, Steve
Hynes, Shane
Ireland, Michael
Irwin, Jonathan M.
Isopi, Giovanni
Jensen, Eric L.N.
Jehin, Emmanuël
Kaltenegger, Lisa
Kielkopf, John F.
Kopparapu, Ravi
Lewis, Nikole
Lopez, Eric
Lissauer, Jack J.
Mann, Andrew W.
Mallia, Franco
Mandell, Avi
Matson, Rachel A.
Mazeh, Tsevi
Monsue, Teresa
Moran, Sarah E.
Moran, Vickie
Morley, Caroline V.
Morris, Brett
Muirhead, Philip
Mukai, Koji
Mullally, Susan
Mullally, Fergal
Murray, Catriona
Narita, Norio
Palle, Enric
Pidhorodetska, Daria
Quinn, David
Relles, Howard
Rinehart, Stephen
Ritsko, Matthew
Rodriguez, Joseph E.
Rowden, Pamela
Rowe, Jason F.
Sebastian, Daniel
Sefako, Ramotholo
Shahaf, Sahar
Shporer, Avi
Reyes, Naylynn Tañón
Tenenbaum, Peter
Ting, Eric B.
Twicken, Joseph D.
van Belle, Gerard T.
Vega, Laura
Volosin, Jeffrey
Walkowicz, Lucianne M.
Youngblood, Allison
Metadata
Show full item recordPermanent Link
https://hdl.handle.net/2144/39805Version
Published version
Citation (published version)
Veselin B. Kostov, Joshua E. Schlieder, Thomas Barclay, Elisa V. Quintana, Knicole D. Colón, 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 Ricker, Roland Vanderspek, David Latham, Sara Seager, Joshua Winn, Jon M. Jenkins, Dennis Afanasev, James J.D. Armstrong, Giada Arney, Patricia Boyd, Geert Barentsen, Khalid Barkaoui, Natalie E. Batalha, Charles Beichman, Daniel Bayliss, Christopher Burke, Artem Burdanov, Luca Cacciapuoti, Andrew Carson, David Charbonneau, Jessie Christiansen, David Ciardi, Mark Clampin, Kevin I. Collins, Dennis M. Conti, Jeffrey Coughlin, Giovanni Covone, Ian Crossfield, Laetitia Delrez, Shawn Domagal-Goldman, Courtney Dressing, Elsa Ducrot, Zahra Essack, Mark E. Everett, Thomas Fauchez, Daniel Foreman-Mackey, Tianjun Gan, Emily Gilbert, Michaël Gillon, Erica Gonzales, Aaron Hamann, Christina Hedges, Hannah Hocutt, Kelsey Hoffman, Elliott P. Horch, Keith Horne, Steve Howell, Shane Hynes, Michael Ireland, Jonathan M. Irwin, Giovanni Isopi, Eric L.N. Jensen, Emmanuël Jehin, Lisa Kaltenegger, John F. Kielkopf, Ravi Kopparapu, Nikole Lewis, Eric Lopez, Jack J. Lissauer, Andrew W. Mann, Franco Mallia, Avi Mandell, Rachel A. Matson, Tsevi Mazeh, Teresa Monsue, Sarah E. Moran, Vickie Moran, Caroline V. Morley, Brett Morris, Philip Muirhead, Koji Mukai, Susan Mullally, Fergal Mullally, Catriona Murray, Norio Narita, Enric Palle, Daria Pidhorodetska, David Quinn, Howard Relles, Stephen Rinehart, Matthew Ritsko, Joseph E. Rodriguez, Pamela Rowden, Jason F. Rowe, Daniel Sebastian, Ramotholo Sefako, Sahar Shahaf, Avi Shporer, Naylynn Tañón Reyes, Peter Tenenbaum, Eric B. Ting, Joseph D. Twicken, Gerard T. van Belle, Laura Vega, Jeffrey Volosin, Lucianne M. Walkowicz, Allison Youngblood. 2019. "The L 98-59 System: Three Transiting, Terrestrial-size Planets Orbiting a Nearby M Dwarf." The Astronomical Journal, Volume 158, Issue 1, pp. 32 - 32. https://doi.org/10.3847/1538-3881/ab2459Abstract
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.
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