A super-Earth and two sub-Neptunes transiting the nearby and quiet M dwarf TOI-270
Article
Article Title | A super-Earth and two sub-Neptunes transiting the nearby and quiet M dwarf TOI-270 |
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ERA Journal ID | 213748 |
Article Category | Article |
Authors | Gunther, Maximilian N. (Author), Pozuelos, Francisco J. (Author), Dittmann, Jason A. (Author), Dragomir, Diana (Author), Kane, Stephen R. (Author), Daylan, Tansu (Author), Feinstein, Adina D. (Author), Huang, Chelsea X. (Author), Morton, Timothy D. (Author), Bonfanti, Andrea (Author), Bouma, L. G. (Author), Burt, Jennifer (Author), Collins, Karen A. (Author), Lissauer, Jack J. (Author), Matthews, Elisabeth (Author), Montet, Benjamin T. (Author), Vanderburg, Andrew (Author), Wang, Songhu (Author), Winters, Jennifer G. (Author), Ricker, George R. (Author), Vanderspek, Roland K. (Author), Lathem, David W. (Author), Seager, Sara (Author), Winn, Joshua N. (Author), Jenkins, Jon M. (Author), Armstrong, James D. (Author), Barkaoui, Khalid (Author), Batalha, Natalie (Author), Bean, Jacob L. (Author), Caldwell, Douglas A. (Author), Ciardi, David R. (Author), Collins, Kevin I. (Author), Crossfield, Ian (Author), Fausnaugh, Michael (Author), Furesz, Gabor (Author), Gan, Tianjun (Author), Gillon, Michael (Author), Guerrero, Natalia (Author), Horne, Keith (Author), Howell, Steve B. (Author), Ireland, Michael (Author), Isopi, Giovanni (Author), Jehin, Emmanuel (Author), Kielkopf, John F. (Author), Lepine, Sebastien (Author), Mallia, Franco (Author), Matson, Rachel A. (Author), Myers, Gordon (Author), Palle, Enric (Author), Quinn, Samuel N. (Author), Relles, Howard M. (Author), Rojas-Ayala, Barbara (Author), Schlieder, Joshua (Author), Sefako, Ramotholo (Author), Shporer, Avi (Author), Suarez, Juan C. (Author), Tan, Thiam-Guan (Author), Ting, Eric B. (Author), Twicken, Joesph D. (Author) and Waite, Ian A. (Author) |
Journal Title | Nature Astronomy |
Journal Citation | 3 (12), pp. 1099-1108 |
Number of Pages | 10 |
Year | 2019 |
Publisher | Nature Publishing Group |
Place of Publication | United Kingdom |
ISSN | 2397-3366 |
Digital Object Identifier (DOI) | https://doi.org/10.1038/s41550-019-0845-5 |
Web Address (URL) | https://www.nature.com/articles/s41550-019-0845-5 |
Abstract | One of the primary goals of exoplanetary science is to detect small, temperate planets passing (transiting) in front of bright and quiet host stars. This enables the characterization of planetary sizes, orbits, bulk compositions, atmospheres and formation histories. These studies are facilitated by small and cool M dwarf host stars. Here we report the Transiting Exoplanet Survey Satellite (TESS)1 discovery of three small planets transiting one of the nearest and brightest M dwarf hosts observed to date, TOI-270 (TIC 259377017, with K-magnitude 8.3, and 22.5 parsecs away from Earth). The M3V-type star is transited by the super-Earth-sized planet TOI-270 b (1.247 +0.089 −0.083 R⊕) and the sub-Neptune-sized planets TOI-270 c (2.42 ± 0.13 R⊕) and TOI-270 d (2.13 ± 0.12 R⊕). The planets orbit close to a mean-motion resonant chain, with periods (3.36 days, 5.66 days and 11.38 days, respectively) near ratios of small integers (5:3 and 2:1). TOI-270 is a prime target for future studies because (1) its near-resonance allows the detection of transit timing variations, enabling precise mass measurements and dynamical studies; (2) its brightness enables independent radial-velocity mass measurements; (3) the outer planets are ideal for atmospheric characterization via transmission spectroscopy; and (4) the quietness of the star enables future searches for habitable zone planets. Altogether, very few systems with small, temperate exoplanets are as suitable for such complementary and detailed characterization as TOI-270. |
Keywords | dwarf host stars; Transiting Exoplanet Survey Satellite; TOI-270 |
Related Output | |
Is supplemented by | Publisher Correction: A super-Earth and two sub-Neptunes transiting the nearby and quiet M dwarf TOI-270 |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
This article has been corrected. Please see the Related Output. | |
Institution of Origin | University of Southern Queensland |
Byline Affiliations | Massachusetts Institute of Technology, United States |
University of Liege, Belgium | |
University of California, United States | |
University of Chicago, United States | |
University of Florida, United States | |
Princeton University, United States | |
Center for Astrophysics Harvard and Smithsonian, United States | |
NASA Ames Research Center, United States | |
University of Texas at Austin, United States | |
Yale University, United States | |
University of Hawaii, United States | |
Cadi Ayyad University, Morocco | |
California Institute of Technology (Caltech), United States | |
National Aeronautics and Space Administration (NASA), United States | |
Vanderbilt University, United States | |
Tsinghua University, China | |
University of St Andrews, United Kingdom | |
Australian National University | |
Campo Catino Astronomical Observatory, Italy | |
School of Mathematics, Physics and Computing | |
Georgia State University, United States | |
American Association of Variable Star Observers, United States | |
Institute of Astrophysics of the Canary Islands, Spain | |
Andres Bello National University, Chile | |
NASA Goddard Space Flight Center, United States | |
South African Astronomical Observatory, South Africa | |
University of Granada, Spain | |
Perth Exoplanet Survey Telescope Observatory, Australia | |
SETI Institute, United States | |
Centre for Astrophysics |
https://research.usq.edu.au/item/q5856/a-super-earth-and-two-sub-neptunes-transiting-the-nearby-and-quiet-m-dwarf-toi-270
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