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

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    Date Issued
    2019-07
    Publisher Version
    10.3847/1538-3881/ab2459
    Author(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
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    Permanent Link
    https://hdl.handle.net/2144/39805
    Version
    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/ab2459
    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.
    Rights
    © 2019 The American Astronomical Society.
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    • CAS: Astronomy: Scholarly Papers [211]
    • BU Open Access Articles [3866]


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