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The Multiplanet Sys...
The Multiplanet System TOI-421*
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- Carleo, Ilaria (author)
- Wesleyan University,Istituto nazionale di astrofisica (INAF)
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- Gandolfi, Davide (author)
- Universita degli Studi di Torino,University of Turin
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- Barragan, Oscar (author)
- University Of Oxford
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show more...
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- Livingston, John H. (author)
- University of Tokyo, Japan
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- Persson, Carina, 1964 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Lam, Kristine W. F. (author)
- Technische Universität Berlin
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- Vidotto, Aline (author)
- Trinity College Dublin, the University of Dublin
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- Lund, Michael B. (author)
- California Institute of Technology (Caltech)
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- D'Angelo, Carolina Villarreal (author)
- Trinity College Dublin, the University of Dublin
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- Collins, Karen A. (author)
- Harvard-Smithsonian Center for Astrophysics
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- Fossati, Luca (author)
- Österreichische Akademie der Wissenschaften,Austrian Academy of Sciences
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- Howard, Andrew W. (author)
- California Institute of Technology (Caltech)
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- Kubyshkina, Daria (author)
- Österreichische Akademie der Wissenschaften,Austrian Academy of Sciences
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- Brahm, Rafael (author)
- Universidad Adolfo Ibanez,Adolfo Ibáñez University,Instituto Milenio de Astrofísica,Millennium Institute of Astrophysics
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- Oklopcic, Antonija (author)
- Harvard-Smithsonian Center for Astrophysics
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- Molliere, Paul (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Redfield, Seth (author)
- Wesleyan University
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- Serrano, Luisa Maria (author)
- Universita degli Studi di Torino,University of Turin,Universidade do Porto,University of Porto
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- Dai, Fei (author)
- Massachusetts Institute of Technology (MIT),Princeton University
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- Fridlund, Malcolm, 1952 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Borsa, Francesco (author)
- Istituto nazionale di astrofisica (INAF)
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- Korth, Judith (author)
- Universität zu Köln,University of Cologne
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- Esposito, Massimiliano (author)
- Thüringer Landessternwarte Tautenburg
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- Diaz, Matias R. (author)
- Universidad de Chile (UCH),University of Chile (UCH)
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- Nielsen, Louise Dyregaard (author)
- Université de Genève,University of Geneva
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- Hellier, Coel (author)
- Keele University
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- Mathur, Savita (author)
- Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias
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- Deeg, Hans J. (author)
- Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
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- Hatzes, Artie P. (author)
- Thüringer Landessternwarte Tautenburg
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- Benatti, Serena (author)
- Istituto nazionale di astrofisica (INAF)
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- Rodler, Florian (author)
- European Southern Observatory (ESO)
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- Alarcon, Javier (author)
- European Southern Observatory (ESO)
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- Spina, Lorenzo (author)
- Monash University,ARC Centre of Excellence for All-sky Astrophysics (CAASTRO)
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- Santos, Angela R. G. (author)
- Space Science Institute
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- Georgieva, Iskra, 1987 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Garcia, Rafael A. (author)
- Paris Diderot University, France,Université Paris-Saclay,University Paris-Saclay
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- Gonzalez-Cuesta, Lucia (author)
- Instituto de Astrofísica de Canarias
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- Ricker, George R. (author)
- Massachusetts Institute of Technology (MIT)
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- Vanderspek, Roland (author)
- Massachusetts Institute of Technology (MIT)
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- Latham, David W. (author)
- Harvard-Smithsonian Center for Astrophysics
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- Seager, Sara (author)
- Massachusetts Institute of Technology (MIT)
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- Winn, Joshua N. (author)
- Princeton University
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- Jenkins, Jon M. (author)
- NASA Ames Research Center
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- Albrecht, Simon (author)
- Århus Universitet,Aarhus University
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Batalha, Natalie M. (author)
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- Beard, Corey (author)
- University of California at Irvine (UCI)
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- Boyd, Patricia T. (author)
- NASA Goddard Space Flight Center
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- Bouchy, Francois (author)
- Université de Genève,University of Geneva
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- Burt, Jennifer A. (author)
- California Institute of Technology (Caltech)
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- Butler, R. Paul (author)
- Carnegie Institution for Science
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- Cabrera, Juan (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
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- Chontos, Ashley (author)
- University of Hawaii
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- Ciardi, David R. (author)
- California Institute of Technology (Caltech)
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- Cochran, William D. (author)
- The University of Texas at Austin, USA
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- Collins, (author)
- George Mason University
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- Crane, Jeffrey D. (author)
- Carnegie Institution for Science
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- Crossfield, Ian (author)
- University of Kansas
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- Csizmadia, Szilard (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
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- Dragomir, Diana (author)
- University of New Mexico
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- Dressing, Courtney (author)
- University of California at Berkeley
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- Eigmueller, Philipp (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
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- Endl, Michael (author)
- The University of Texas at Austin, USA
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- Erikson, Anders (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
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- Espinoza, Nestor (author)
- Space Telescope Science Institute (STScI)
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- Fausnaugh, Michael (author)
- Massachusetts Institute of Technology (MIT)
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- Feng, Fabo (author)
- Carnegie Institution for Science
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- Flowers, Erin (author)
- Princeton University
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- Fulton, Benjamin (author)
- California Institute of Technology (Caltech)
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Gonzales, Erica J. (author)
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- Grieves, Nolan (author)
- Université de Genève,University of Geneva
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- Grziwa, Sascha (author)
- Universität zu Köln,University of Cologne
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- Guenther, Eike W. (author)
- Thüringer Landessternwarte Tautenburg
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- Guerrero, Natalia M. (author)
- Massachusetts Institute of Technology (MIT)
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- Henning, Thomas (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Hidalgo, Diego (author)
- Instituto de Astrofísica de Canarias
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- Hirano, Teruyuki (author)
- Tokyo Institute of Technology
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- Hjorth, Maria (author)
- Århus Universitet,Aarhus University
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- Huber, Daniel (author)
- University of Hawaii
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- Isaacson, Howard (author)
- University of Southern Queensland,University of California at Berkeley
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- Jones, Matias (author)
- European Southern Observatory (ESO)
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- Jordan, Andres (author)
- Universidad Adolfo Ibanez,Adolfo Ibáñez University,Instituto Milenio de Astrofísica,Millennium Institute of Astrophysics
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- Kabath, Petr (author)
- Czech Academy of Sciences
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Kane, Stephen R. (author)
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- Knudstrup, Emil (author)
- Århus Universitet,Aarhus University
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- Lubin, Jack (author)
- University of California at Irvine (UCI)
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- Luque, Rafael (author)
- Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias
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- Mireles, Ismael (author)
- Massachusetts Institute of Technology (MIT)
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- Narita, Norio (author)
- University of Tokyo, Japan,Japan Science and Technology Agency (JST),Instituto de Astrofísica de Canarias,National Institutes of Natural Sciences (NINS)
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- Nespral, David (author)
- Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias
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- Niraula, Prajwal (author)
- Massachusetts Institute of Technology (MIT)
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- Nowak, Grzegorz (author)
- Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias
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- Palle, Enric (author)
- Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias
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- Paetzold, Martin (author)
- Universität zu Köln,University of Cologne
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- Petigura, Erik A. (author)
- University of California at Los Angeles (UCLA)
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- Prieto-Arranz, Jorge (author)
- Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias
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- Rauer, Heike (author)
- Freie Universität Berlin,Technische Universität Berlin,Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
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- Robertson, Paul (author)
- University of California at Irvine (UCI)
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- Rose, Mark E. (author)
- NASA Ames Research Center
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- Roy, Arpita (author)
- California Institute of Technology (Caltech)
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- Sarkis, Paula (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Schlieder, Joshua E. (author)
- NASA Goddard Space Flight Center
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- Segransan, Damien (author)
- Université de Genève,University of Geneva
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- Shectman, Stephen (author)
- Carnegie Institution for Science
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- Skarka, Marek (author)
- Masarykova Univerzita,Masaryk University,Czech Academy of Sciences
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- Smith, Alexis M. S. (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
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- Smith, Jeffrey C. (author)
- NASA Ames Research Center
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- Stassun, Keivan (author)
- Vanderbilt University
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- Teske, Johanna (author)
- Carnegie Institution for Science
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- Twicken, Joseph D. (author)
- NASA Ames Research Center
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- Van Eylen, Vincent (author)
- University College London (UCL)
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- Wang, Sharon (author)
- Carnegie Institution for Science
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- Weiss, Lauren M. (author)
- University of Hawaii
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- Wyttenbach, Aurelien (author)
- Université Grenoble Alpes,Grenoble Alpes University,Max-Planck-Institut für Astronomie,Max Planck Institute for Astronomy,Université de Genève,University of Geneva,Universiteit Leiden (UL),Leiden University (UL)
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(creator_code:org_t)
- 2020-08-14
- 2020
- English.
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In: Astronomical Journal. - : American Astronomical Society. - 1538-3881 .- 0004-6256. ; 160:3
- Related links:
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https://dspace.mit.e...
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https://research.cha...
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https://doi.org/10.3...
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Abstract
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- We report the discovery of a warm Neptune and a hot sub-Neptune transiting TOI-421 (BD-14 1137, TIC 94986319), a bright (V = 9.9) G9 dwarf star in a visual binary system observed by the Transiting Exoplanet Survey Satellite (TESS) space mission in Sectors 5 and 6. We performed ground-based follow-up observations-comprised of Las Cumbres Observatory Global Telescope transit photometry, NIRC2 adaptive optics imaging, and FIbre-fed Echelle Spectrograph, CORALIE, High Accuracy Radial velocity Planet Searcher, High Resolution echelle Spectrometer, and Planet Finder Spectrograph high-precision Doppler measurements-and confirmed the planetary nature of the 16 day transiting candidate announced by the TESS team. We discovered an additional radial velocity signal with a period of five days induced by the presence of a second planet in the system, which we also found to transit its host star. We found that the inner mini-Neptune, TOI-421 b, has an orbital period of P-b = 5.19672 +/- 0.00049 days, a mass of M-b = 7.17 +/- 0.66 M-circle plus, and a radius of R-b = R-circle plus, whereas the outer warm Neptune, TOI-421 c, has a period of P-c = 16.06819 +/- 0.00035 days, a mass of M-c = 16.42(-1.04)(+1.06)M(circle plus), a radius of R-c = 5.09(-0.15)(+0.16)R(circle plus), and a density of rho(c) = 0.685(-0.072)(+0.080) cm(-3). With its characteristics, the outer planet (rho(c) = 0.685(-0.0072)(+0.080) cm(-3)) is placed in the intriguing class of the super-puffy mini-Neptunes. TOI-421 b and TOI-421 c are found to be well-suited for atmospheric characterization. Our atmospheric simulations predict significant Ly alpha transit absorption, due to strong hydrogen escape in both planets, as well as the presence of detectable CH4 in the atmosphere of TOI-421 c if equilibrium chemistry is assumed.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
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Carleo, Ilaria
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Gandolfi, Davide
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Barragan, Oscar
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Livingston, John ...
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Persson, Carina, ...
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Lam, Kristine W. ...
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Vidotto, Aline
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Lund, Michael B.
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D'Angelo, Caroli ...
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Collins, Karen A ...
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Fossati, Luca
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Howard, Andrew W ...
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Kubyshkina, Dari ...
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Brahm, Rafael
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Oklopcic, Antoni ...
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Molliere, Paul
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Redfield, Seth
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Serrano, Luisa M ...
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Dai, Fei
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Fridlund, Malcol ...
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Borsa, Francesco
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Korth, Judith
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Esposito, Massim ...
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Diaz, Matias R.
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Nielsen, Louise ...
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Hellier, Coel
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Mathur, Savita
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Deeg, Hans J.
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Hatzes, Artie P.
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Benatti, Serena
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Rodler, Florian
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Alarcon, Javier
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Spina, Lorenzo
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Santos, Angela R ...
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Georgieva, Iskra ...
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Garcia, Rafael A ...
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Gonzalez-Cuesta, ...
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Ricker, George R ...
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Vanderspek, Rola ...
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Latham, David W.
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Seager, Sara
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Winn, Joshua N.
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Jenkins, Jon M.
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Albrecht, Simon
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Batalha, Natalie ...
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Beard, Corey
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Boyd, Patricia T ...
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Bouchy, Francois
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Burt, Jennifer A ...
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Butler, R. Paul
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Cabrera, Juan
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Chontos, Ashley
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Ciardi, David R.
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Cochran, William ...
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Collins,
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Crane, Jeffrey D ...
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Crossfield, Ian
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Csizmadia, Szila ...
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Dragomir, Diana
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Dressing, Courtn ...
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Eigmueller, Phil ...
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Endl, Michael
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Erikson, Anders
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Espinoza, Nestor
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Fausnaugh, Micha ...
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Feng, Fabo
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Flowers, Erin
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Fulton, Benjamin
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Gonzales, Erica ...
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Grieves, Nolan
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Grziwa, Sascha
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Guenther, Eike W ...
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Guerrero, Natali ...
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Henning, Thomas
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Hidalgo, Diego
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Hirano, Teruyuki
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Hjorth, Maria
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Huber, Daniel
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Isaacson, Howard
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Jones, Matias
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Jordan, Andres
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Kabath, Petr
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Kane, Stephen R.
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Knudstrup, Emil
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Lubin, Jack
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Luque, Rafael
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Mireles, Ismael
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Narita, Norio
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Nespral, David
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Niraula, Prajwal
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Nowak, Grzegorz
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Palle, Enric
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Paetzold, Martin
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Petigura, Erik A ...
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Prieto-Arranz, J ...
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Rauer, Heike
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Robertson, Paul
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Rose, Mark E.
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Roy, Arpita
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Sarkis, Paula
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Schlieder, Joshu ...
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Segransan, Damie ...
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Shectman, Stephe ...
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Skarka, Marek
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Smith, Alexis M. ...
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Smith, Jeffrey C ...
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Stassun, Keivan
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Teske, Johanna
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Twicken, Joseph ...
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Van Eylen, Vince ...
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Wang, Sharon
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Weiss, Lauren M.
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Wyttenbach, Aure ...
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- NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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Chalmers University of Technology