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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 13793naa a2201681 4500 | |
| 001 | oai:research.chalmers.se:ec7311dd-ad4c-4ad0-854d-c3ec3ab73366 | |
| 003 | SwePub | |
| 008 | 200910s2020 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://research.chalmers.se/publication/5190432 URI |
| 024 | 7 | a https://doi.org/10.3847/1538-3881/aba1242 DOI |
| 040 | a (SwePub)cth | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a art2 swepub-publicationtype |
| 072 | 7 | a ref2 swepub-contenttype |
| 100 | 1 | a Carleo, Ilariau Wesleyan University,Istituto nazionale di astrofisica (INAF)4 aut |
| 245 | 1 0 | a The Multiplanet System TOI-421* |
| 264 | c 2020-08-14 | |
| 264 | 1 | b American Astronomical Society,c 2020 |
| 520 | a 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. | |
| 650 | 7 | a NATURVETENSKAPx Geovetenskap och miljövetenskapx Meteorologi och atmosfärforskning0 (SwePub)105082 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Meteorology and Atmospheric Sciences0 (SwePub)105082 hsv//eng |
| 650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
| 650 | 7 | a NATURVETENSKAPx Fysikx Atom- och molekylfysik och optik0 (SwePub)103022 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Atom and Molecular Physics and Optics0 (SwePub)103022 hsv//eng |
| 700 | 1 | a Gandolfi, Davideu Universita degli Studi di Torino,University of Turin4 aut |
| 700 | 1 | a Barragan, Oscaru University Of Oxford4 aut |
| 700 | 1 | a Livingston, John H.u University of Tokyo, Japan4 aut |
| 700 | 1 | a Persson, Carina,d 1964u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)carina64 |
| 700 | 1 | a Lam, Kristine W. F.u Technische Universität Berlin4 aut |
| 700 | 1 | a Vidotto, Alineu Trinity College Dublin, the University of Dublin4 aut |
| 700 | 1 | a Lund, Michael B.u California Institute of Technology (Caltech)4 aut |
| 700 | 1 | a D'Angelo, Carolina Villarrealu Trinity College Dublin, the University of Dublin4 aut |
| 700 | 1 | a Collins, Karen A.u Harvard-Smithsonian Center for Astrophysics4 aut |
| 700 | 1 | a Fossati, Lucau Österreichische Akademie der Wissenschaften,Austrian Academy of Sciences4 aut |
| 700 | 1 | a Howard, Andrew W.u California Institute of Technology (Caltech)4 aut |
| 700 | 1 | a Kubyshkina, Dariau Österreichische Akademie der Wissenschaften,Austrian Academy of Sciences4 aut |
| 700 | 1 | a Brahm, Rafaelu Universidad Adolfo Ibanez,Adolfo Ibáñez University,Instituto Milenio de Astrofísica,Millennium Institute of Astrophysics4 aut |
| 700 | 1 | a Oklopcic, Antonijau Harvard-Smithsonian Center for Astrophysics4 aut |
| 700 | 1 | a Molliere, Paulu Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut |
| 700 | 1 | a Redfield, Sethu Wesleyan University4 aut |
| 700 | 1 | a Serrano, Luisa Mariau Universita degli Studi di Torino,University of Turin,Universidade do Porto,University of Porto4 aut |
| 700 | 1 | a Dai, Feiu Massachusetts Institute of Technology (MIT),Princeton University4 aut |
| 700 | 1 | a Fridlund, Malcolm,d 1952u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)malfri |
| 700 | 1 | a Borsa, Francescou Istituto nazionale di astrofisica (INAF)4 aut |
| 700 | 1 | a Korth, Judithu Universität zu Köln,University of Cologne4 aut |
| 700 | 1 | a Esposito, Massimilianou Thüringer Landessternwarte Tautenburg4 aut |
| 700 | 1 | a Diaz, Matias R.u Universidad de Chile (UCH),University of Chile (UCH)4 aut |
| 700 | 1 | a Nielsen, Louise Dyregaardu Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Hellier, Coelu Keele University4 aut |
| 700 | 1 | a Mathur, Savitau Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias4 aut |
| 700 | 1 | a Deeg, Hans J.u Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna4 aut |
| 700 | 1 | a Hatzes, Artie P.u Thüringer Landessternwarte Tautenburg4 aut |
| 700 | 1 | a Benatti, Serenau Istituto nazionale di astrofisica (INAF)4 aut |
| 700 | 1 | a Rodler, Florianu European Southern Observatory (ESO)4 aut |
| 700 | 1 | a Alarcon, Javieru European Southern Observatory (ESO)4 aut |
| 700 | 1 | a Spina, Lorenzou Monash University,ARC Centre of Excellence for All-sky Astrophysics (CAASTRO)4 aut |
| 700 | 1 | a Santos, Angela R. G.u Space Science Institute4 aut |
| 700 | 1 | a Georgieva, Iskra,d 1987u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)iskrag |
| 700 | 1 | a Garcia, Rafael A.u Paris Diderot University, France,Université Paris-Saclay,University Paris-Saclay4 aut |
| 700 | 1 | a Gonzalez-Cuesta, Luciau Instituto de Astrofísica de Canarias4 aut |
| 700 | 1 | a Ricker, George R.u Massachusetts Institute of Technology (MIT)4 aut |
| 700 | 1 | a Vanderspek, Rolandu Massachusetts Institute of Technology (MIT)4 aut |
| 700 | 1 | a Latham, David W.u Harvard-Smithsonian Center for Astrophysics4 aut |
| 700 | 1 | a Seager, Sarau Massachusetts Institute of Technology (MIT)4 aut |
| 700 | 1 | a Winn, Joshua N.u Princeton University4 aut |
| 700 | 1 | a Jenkins, Jon M.u NASA Ames Research Center4 aut |
| 700 | 1 | a Albrecht, Simonu Århus Universitet,Aarhus University4 aut |
| 700 | 1 | a Batalha, Natalie M.4 aut |
| 700 | 1 | a Beard, Coreyu University of California at Irvine (UCI)4 aut |
| 700 | 1 | a Boyd, Patricia T.u NASA Goddard Space Flight Center4 aut |
| 700 | 1 | a Bouchy, Francoisu Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Burt, Jennifer A.u California Institute of Technology (Caltech)4 aut |
| 700 | 1 | a Butler, R. Paulu Carnegie Institution for Science4 aut |
| 700 | 1 | a Cabrera, Juanu Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)4 aut |
| 700 | 1 | a Chontos, Ashleyu University of Hawaii4 aut |
| 700 | 1 | a Ciardi, David R.u California Institute of Technology (Caltech)4 aut |
| 700 | 1 | a Cochran, William D.u The University of Texas at Austin, USA4 aut |
| 700 | 1 | a Collins,u George Mason University4 aut |
| 700 | 1 | a Crane, Jeffrey D.u Carnegie Institution for Science4 aut |
| 700 | 1 | a Crossfield, Ianu University of Kansas4 aut |
| 700 | 1 | a Csizmadia, Szilardu Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)4 aut |
| 700 | 1 | a Dragomir, Dianau University of New Mexico4 aut |
| 700 | 1 | a Dressing, Courtneyu University of California at Berkeley4 aut |
| 700 | 1 | a Eigmueller, Philippu Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)4 aut |
| 700 | 1 | a Endl, Michaelu The University of Texas at Austin, USA4 aut |
| 700 | 1 | a Erikson, Andersu Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)4 aut |
| 700 | 1 | a Espinoza, Nestoru Space Telescope Science Institute (STScI)4 aut |
| 700 | 1 | a Fausnaugh, Michaelu Massachusetts Institute of Technology (MIT)4 aut |
| 700 | 1 | a Feng, Fabou Carnegie Institution for Science4 aut |
| 700 | 1 | a Flowers, Erinu Princeton University4 aut |
| 700 | 1 | a Fulton, Benjaminu California Institute of Technology (Caltech)4 aut |
| 700 | 1 | a Gonzales, Erica J.4 aut |
| 700 | 1 | a Grieves, Nolanu Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Grziwa, Saschau Universität zu Köln,University of Cologne4 aut |
| 700 | 1 | a Guenther, Eike W.u Thüringer Landessternwarte Tautenburg4 aut |
| 700 | 1 | a Guerrero, Natalia M.u Massachusetts Institute of Technology (MIT)4 aut |
| 700 | 1 | a Henning, Thomasu Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut |
| 700 | 1 | a Hidalgo, Diegou Instituto de Astrofísica de Canarias4 aut |
| 700 | 1 | a Hirano, Teruyukiu Tokyo Institute of Technology4 aut |
| 700 | 1 | a Hjorth, Mariau Århus Universitet,Aarhus University4 aut |
| 700 | 1 | a Huber, Danielu University of Hawaii4 aut |
| 700 | 1 | a Isaacson, Howardu University of Southern Queensland,University of California at Berkeley4 aut |
| 700 | 1 | a Jones, Matiasu European Southern Observatory (ESO)4 aut |
| 700 | 1 | a Jordan, Andresu Universidad Adolfo Ibanez,Adolfo Ibáñez University,Instituto Milenio de Astrofísica,Millennium Institute of Astrophysics4 aut |
| 700 | 1 | a Kabath, Petru Czech Academy of Sciences4 aut |
| 700 | 1 | a Kane, Stephen R.4 aut |
| 700 | 1 | a Knudstrup, Emilu Århus Universitet,Aarhus University4 aut |
| 700 | 1 | a Lubin, Jacku University of California at Irvine (UCI)4 aut |
| 700 | 1 | a Luque, Rafaelu Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias4 aut |
| 700 | 1 | a Mireles, Ismaelu Massachusetts Institute of Technology (MIT)4 aut |
| 700 | 1 | a Narita, Noriou University of Tokyo, Japan,Japan Science and Technology Agency (JST),Instituto de Astrofísica de Canarias,National Institutes of Natural Sciences (NINS)4 aut |
| 700 | 1 | a Nespral, Davidu Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias4 aut |
| 700 | 1 | a Niraula, Prajwalu Massachusetts Institute of Technology (MIT)4 aut |
| 700 | 1 | a Nowak, Grzegorzu Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias4 aut |
| 700 | 1 | a Palle, Enricu Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias4 aut |
| 700 | 1 | a Paetzold, Martinu Universität zu Köln,University of Cologne4 aut |
| 700 | 1 | a Petigura, Erik A.u University of California at Los Angeles (UCLA)4 aut |
| 700 | 1 | a Prieto-Arranz, Jorgeu Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias4 aut |
| 700 | 1 | a Rauer, Heikeu Freie Universität Berlin,Technische Universität Berlin,Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)4 aut |
| 700 | 1 | a Robertson, Paulu University of California at Irvine (UCI)4 aut |
| 700 | 1 | a Rose, Mark E.u NASA Ames Research Center4 aut |
| 700 | 1 | a Roy, Arpitau California Institute of Technology (Caltech)4 aut |
| 700 | 1 | a Sarkis, Paulau Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut |
| 700 | 1 | a Schlieder, Joshua E.u NASA Goddard Space Flight Center4 aut |
| 700 | 1 | a Segransan, Damienu Université de Genève,University of Geneva4 aut |
| 700 | 1 | a Shectman, Stephenu Carnegie Institution for Science4 aut |
| 700 | 1 | a Skarka, Mareku Masarykova Univerzita,Masaryk University,Czech Academy of Sciences4 aut |
| 700 | 1 | a Smith, Alexis M. S.u Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)4 aut |
| 700 | 1 | a Smith, Jeffrey C.u NASA Ames Research Center4 aut |
| 700 | 1 | a Stassun, Keivanu Vanderbilt University4 aut |
| 700 | 1 | a Teske, Johannau Carnegie Institution for Science4 aut |
| 700 | 1 | a Twicken, Joseph D.u NASA Ames Research Center4 aut |
| 700 | 1 | a Van Eylen, Vincentu University College London (UCL)4 aut |
| 700 | 1 | a Wang, Sharonu Carnegie Institution for Science4 aut |
| 700 | 1 | a Weiss, Lauren M.u University of Hawaii4 aut |
| 700 | 1 | a Wyttenbach, Aurelienu 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)4 aut |
| 710 | 2 | a Wesleyan Universityb Istituto nazionale di astrofisica (INAF)4 org |
| 773 | 0 | t Astronomical Journald : American Astronomical Societyg 160:3q 160:3x 1538-3881x 0004-6256 |
| 856 | 4 | u https://dspace.mit.edu/bitstream/1721.1/134321/2/Carleo_2020_AJ_160_114.pdf |
| 856 | 4 8 | u https://research.chalmers.se/publication/519043 |
| 856 | 4 8 | u https://doi.org/10.3847/1538-3881/aba124 |
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