The L 98-59 System: Three Transiting, Terrestrial-size Planets Orbiting a Nearby M Dwarf

Autor: Jason F. Rowe, Francisco J. Pozuelos, Lucianne M. Walkowicz, Christopher J. Burke, Stephen R. Kane, Eric L. N. Jensen, Brett M. Morris, Daniel Foreman-Mackey, Jonathan Brande, Jessie L. Christiansen, Jon M. Jenkins, Jennifer G. Winters, Thomas Fauchez, Zahra Essack, C. Murray, Elsa Ducrot, Caroline V. Morley, Roland Vanderspek, Charles Beichman, Keivan G. Stassun, Daria Pidhorodetska, Jeffrey Volosin, James D. Armstrong, Laura Vega, Courtney D. Dressing, Elisabeth Matthews, Stephen A. Rinehart, Khalid Barkaoui, Erica J. Gonzales, Susan E. Mullally, Natalie E. Batalha, David Quinn, Elisa V. Quintana, Luca Cacciapuoti, Michaël Gillon, Norio Narita, Vickie Eakin Moran, Samuel Hadden, Ian J. M. Crossfield, Giada Arney, Peter Tenenbaum, Laetitia Delrez, Giovanni Isopi, Sarah E. Moran, Tsevi Mazeh, Teresa Monsue, Matthew Ritsko, David Charbonneau, Knicole D. Colón, Adina D. Feinstein, Giovanni Covone, Dennis M. Conti, Rachel A. Matson, Michael J. Ireland, Kevin I. Collins, Joseph D. Twicken, Christopher Lam, Naylynn Tañón Reyes, Shane Hynes, Philip S. Muirhead, Aaron Hamann, Daniel Bayliss, George R. Ricker, Artem Burdanov, Avi Shporer, Tianjun Gan, Ravi Kumar Kopparapu, Mark E. Everett, Elliott P. Horch, Mark Clampin, Benjamin T. Montet, EnricP alle, David R. Ciardi, Emmanuel Jehin, Joshua E. Schlieder, Shawn Domagal-Goldman, Gerard T. van Belle, Koji Mukai, Eric B. Ting, John F. Kielkopf, Joshua N. Winn, Hannah Hocutt, Sara Seager, Kelsey Hoffman, Fergal Mullally, Joseph E. Rodriguez, Jonathan Irwin, Pamela Rowden, Ramotholo Sefako, Karen A. Collins, Laura Kreidberg, Daniel Sebastian, Thomas Barclay, Andrew W. Mann, Ethan Kruse, Dennis Afanasev, Andrew Carson, Lisa Kaltenegger, Avi Mandell, David W. Latham, Christina Hedges, Eric D. Lopez, Nikole K. Lewis, Howard M. Relles, Patricia T. Boyd, Jeffrey L. Coughlin, F. Mallia, Keith Horne, Sahar Shahaf, Emily A. Gilbert, Jack J. Lissauer, Steve B. Howell, Allison Youngblood, Geert Barentsen, Veselin B. Kostov
Přispěvatelé: Kostov, V. B., Schlieder, J. E., Barclay, T., Quintana, E. V., Colon, K. D., Brande, J., Collins, K. A., Feinstein, A. D., Hadden, S., Kane, S. R., Kreidberg, L., Kruse, E., Lam, C., Matthews, E., Montet, B. T., Pozuelos, F. J., Stassun, K. G., Winters, J. G., Ricker, G., Vanderspek, R., Latham, D., Seager, S., Winn, J., Jenkins, J. M., Afanasev, D., Armstrong, J. J. D., Arney, G., Boyd, P., Barentsen, G., Barkaoui, K., Batalha, N. E., Beichman, C., Bayliss, D., Burke, C., Burdanov, A., Cacciapuoti, L., Carson, A., Charbonneau, D., Christiansen, J., Ciardi, D., Clampin, M., Collins, K. I., Conti, D. M., Coughlin, J., Covone, G., Crossfield, I., Delrez, L., Domagal-Goldman, S., Dressing, C., Ducrot, E., Essack, Z., Everett, M. E., Fauchez, T., Foreman-Mackey, D., Gan, T., Gilbert, E., Gillon, M., Gonzales, E., Hamann, A., Hedges, C., Hocutt, H., Hoffman, K., Horch, E. P., Horne, K., Howell, S., Hynes, S., Ireland, M., Irwin, J. M., Isopi, G., Jensen, E. L. N., Jehin, E., Kaltenegger, L., Kielkopf, J. F., Kopparapu, R., Feenberg, ANDREW LEWIS, Lopez, E., Lissauer, J. J., Mann, A. W., MALLIA MILANES, Giovanna, Mandell, A., Matson, R. A., Mazeh, T., Monsue, T., Moran, S. E., Moran, V., Morley, C. V., Aledort, Louis Morri, Muirhead, P., Mukai, K., Mullally, S., Mullally, F., Murray, ALAN TODD, Narita, N., Palle, E., Pidhorodetska, D., Quinn, D., Relles, H., Rinehart, S., Ritsko, M., Rodriguez, J. E., Rowden, P., Rowe, J. F., Sebastian, D., Sefako, R., Shahaf, S., Shporer, A., Reyes, N. T., Tenenbaum, P., Ting, E. B., Twicken, J. D., Van Belle, G. T., Vega, L., Volosin, J., Walkowicz, L. M., Youngblood, A., Science & Technology Facilities Council, University of St Andrews. School of Physics and Astronomy, University of St Andrews. St Andrews Centre for Exoplanet Science
Jazyk: angličtina
Rok vydání: 2019
Předmět:
ISSN: 3072-1083
1538-3881
Popis: We report the Transiting Exoplanet Survey Satellite (TESS) discovery of three terrestrial-sized 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 broad-band 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 0.8REarth to 1.6REarth. 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 4 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.
27 pages, 22 figures, AJ accepted
Databáze: OpenAIRE
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