TOI-431/HIP 26013: a super-Earth and a sub-Neptune transiting a bright, early K dwarf, with a third RV planet
Article
Article Title | TOI-431/HIP 26013: a super-Earth and a sub-Neptune transiting a bright, early K dwarf, with a third RV planet |
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ERA Journal ID | 1074 |
Article Category | Article |
Authors | Osborn, Ares (Author), Armstrong, David J. (Author), Cale, Bryson (Author), Brahm, Rafael (Author), Wittenmyer, Robert A. (Author), Dai, Fei (Author), Crossfield, Ian J. M. (Author), Bryant, Edward M. (Author), Adibekyan, Vardan (Author), Cloutier, Ryan (Author), Collins, Karen A. (Author), Mena, E. Delgado (Author), Fridlund, Malcolm (Author), Hellier, Coel (Author), Howell, Steve B. (Author), King, George W. (Author), Lillo-Box, Jorge (Author), Otegi, Jon (Author), Sousa, S. (Author), Stassun, Keivan G. (Author), Matthews, Elisabeth C. (Author), Ziegler, Carl (Author), Ricker, George (Author), Vanderspek, Roland (Author), Latham, David W. (Author), Seager, S. (Author), Winn, Joshua N. (Author), Jenkins, Jon M. (Author), Acton, Jack S. (Author), Addison, Brett C. (Author), Anderson, David R. (Author), Ballard, Sarah (Author), Barrado, David (Author), Barros, Susana C. C. (Author), Batalha, Natalie (Author), Bayliss, Daniel (Author), Barclay, Thomas (Author), Benneke, Bjorn (Author), Berberian, John (Author), Bouchy, Francois (Author), Bowler, Brendan P. (Author), Briceno, Cesar (Author), Burke, Christopher J. (Author), Burleigh, Matthew R. (Author), Casewell, Sarah L. (Author), Ciardi, David (Author), Collins, Kevin I. (Author), Cooke, Benjamin F. (Author), Demangeon, Olivier D. S. (Author), Diaz, Rodrigo F. (Author), Dorn, C. (Author), Dragomir, Diana (Author), Dressing, Courtney (Author), Dumusque, Xavier (Author), Espinoza, Nestor (Author), Figueira, P. (Author), Fulton, Benjamin (Author), Furlan, E. (Author), Gaidos, E. (Author), Geneser, C. (Author), Gill, Samuel (Author), Goad, Michael R. (Author), Gonzales, Erica J. (Author), Gorjian, Varoujan (Author), Gunther, Maximilian N. (Author), Helled, Ravit (Author), Henderson, Beth A. (Author), Henning, Thomas (Author), Hogan, Aleisha (Author), Hojjatpanah, Saeed (Author), Horner, Jonathan (Author), Howard, Andrew W. (Author), Hoyer, Sergio (Author), Huber, Dan (Author), Isaacson, Howard (Author), Jenkins, James S. (Author), Jensen, Eric L. N. (Author), Jordan, Andres (Author), Kane, Stephen R. (Author), Kidwell, Richard C. (Author), Kielkopf, John (Author), Law, Nicholas (Author), Lendl, Monika (Author), Lund, M. (Author), Matson, Rachel A. (Author), Mann, Andrew W. (Author), McCormac, James (Author), Mengel, Matthew W. (Author), Morales, Farisa Y. (Author), Nielsen, Louise D. (Author), Okumura, Jack (Author), Osborn, Hugh P. (Author), Petigura, Erik A. (Author), Plavchan, Peter (Author), Pollacco, Don (Author), Quintana, Elisa V. (Author), Raynard, Liam (Author), Robertson, Paul (Author), Rose, Mark E. (Author), Roy, Arpita (Author), Reefe, Michael (Author), Santerne, Alexandre (Author), Santos, Nuno C. (Author), Sarkis, Paula (Author), Schlieder, J. (Author), Schwarz, Richard P. (Author), Scott, Nicholas J. (Author), Shporer, Avi (Author), Smith, A. M. S. (Author), Stibbard, C. (Author), Stockdale, Chris (Author), Strom, Paul A. (Author), Twicken, Joseph D. (Author), Tan, Thiam-Guan (Author), Tanner, A. (Author), Teske, J. (Author), Tilbrook, Rosanna H. (Author), Tinney, C. G. (Author), Udry, Stephane (Author), Villasenor, Jesus Noel (Author), Vines, Jose I. (Author), Wang, Sharon X. (Author), Weiss, Lauren M. (Author), West, Richard G. (Author), Wheatley, Peter J. (Author), Wright, Duncan J. (Author), Zhang, Hui (Author) and Zohrabi, F. (Author) |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 507 (2), pp. 2782-2803 |
Number of Pages | 22 |
Year | 2021 |
Publisher | Oxford University Press |
Place of Publication | United Kingdom |
ISSN | 0035-8711 |
1365-2966 | |
Digital Object Identifier (DOI) | https://doi.org/10.1093/mnras/stab2313 |
Web Address (URL) | https://academic.oup.com/mnras/article/507/2/2782/6348103 |
Abstract | We present the bright (V-mag = 9.12), multiplanet system TOI-431, characterized with photometry and radial velocities (RVs). We estimate the stellar rotation period to be 30.5 +/- 0.7 d using archival photometry and RVs. Transiting Exoplanet Survey Satellite (TESS) objects of Interest (TOI)-431b is a super-Earth with a period of 0.49 d, a radius of 1.28 +/- 0.04 R-circle plus, a mass of 3.07 +/- 0.35 M-circle plus, and a density of 8.0 +/- 1.0 g cm(-3); TOI-431 d is a sub-Neptune with a period of 12.46 d, a radius of 3.29 +/- 0.09 R-circle plus, a mass of M-circle plus, and a density of 1.36 +/- 0.25 g cm(-3). We find a third planet, TOI-431c, in the High Accuracy Radial velocity Planet Searcher RV data, but it is not seen to transit in the TESS light curves. It has an Msin i of M-circle plus, and a period of 4.85 d. TOI-431d likely has an extended atmosphere and is one of the most well-suited TESS discoveries for atmospheric characterization, while the super-Earth TOI-431b may be a stripped core. These planets straddle the radius gap, presenting an interesting case-study for atmospheric evolution, and TOI-431b is a prime TESS discovery for the study of rocky planet phase curves. |
Keywords | planets and satellites: detection; planets and satellites:; fundamental parameters; planets and satellites: individual: (TOI-431; TIC 31374837); Astrophysics - Earth and Planetary Astrophysics |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2021 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
Institution of Origin | University of Southern Queensland |
Byline Affiliations | University of Warwick, United Kingdom |
George Mason University, United States | |
Adolfo Ibanez University, Chile | |
Centre for Astrophysics | |
California Institute of Technology (Caltech), United States | |
University of Kansas, United States | |
University of Porto, Portugal | |
Center for Astrophysics Harvard and Smithsonian, United States | |
Leiden University, Netherlands | |
Keele University, United Kingdom | |
National Aeronautics and Space Administration (NASA), United States | |
Astrobiology Center, Spain | |
University of Geneva, Switzerland | |
Vanderbilt University, United States | |
University of Toronto, Canada | |
Massachusetts Institute of Technology, United States | |
Princeton University, United States | |
NASA Ames Research Center, United States | |
University of Leicester, United Kingdom | |
University of Florida, United States | |
University of California, United States | |
University of Maryland, United States | |
University of Montreal, Canada | |
University of Texas at Austin, United States | |
Cerro Tololo Inter-American Observatory, Chile | |
National University of General San Martin, Argentina | |
University of Zurich, Switzerland | |
University of New Mexico, United States | |
Space Telescope Science Institute, United States | |
European Southern Observatory (ESO), Chile | |
University of Hawaii, United States | |
Missouri State University, United States | |
Max Planck Society, Germany | |
Aix-Marseille University, France | |
University of Chile, Chile | |
Swarthmore College, United States | |
University of Louisville, United States | |
University of North Carolina, United States | |
University of Bern, Switzerland | |
United States Naval Observatory, United States | |
NASA Goddard Space Flight Center, United States | |
Patashnick Voorheesville Observatory, United States | |
German Aerospace Centre, Germany | |
Hazelwood Observatory, Australia | |
Perth Exoplanet Survey Telescope Observatory, Australia | |
Mississippi State University, United States | |
Carnegie Institution of Washington, United States | |
University of New South Wales | |
Nanjing University, China |
https://research.usq.edu.au/item/q6x88/toi-431-hip-26013-a-super-earth-and-a-sub-neptune-transiting-a-bright-early-k-dwarf-with-a-third-rv-planet
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