TOI-503: The First Known Brown-dwarf Am-star Binary from the TESS Mission

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Subjak, JanCzech Academy of Sciences,Univerzita Karlova,Charles University (author)

TOI-503: The First Known Brown-dwarf Am-star Binary from the TESS Mission

Article/chapterEnglish2020

Publisher, publication year, extent ...

2020-03-30
American Astronomical Society,2020

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LIBRIS-ID:oai:research.chalmers.se:fb927968-c3ae-41bf-9129-b74f5af9f630
https://research.chalmers.se/publication/516856URI
https://research.chalmers.se/publication/517590URI
https://doi.org/10.3847/1538-3881/ab7245DOI
https://research.chalmers.se/publication/516580URI

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Language:English
Summary in:English

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Subject category:art swepub-publicationtype
Subject category:ref swepub-contenttype

Notes

We report the discovery of an intermediate-mass transiting brown dwarf (BD), TOI-503b, from the TESS mission. TOI-503b is the first BD discovered by TESS, and it has circular orbit around a metallic-line A-type star with a period of P.=.3.6772.+/-.0.0001 days. The light curve from TESS indicates that TOI-503b transits its host star in a grazing manner, which limits the precision with which we measure the BD's radius ( = R 1.34+ R b 0.150.26 J). We obtained highresolution spectroscopic observations with the FIES, Ondr.ejov, PARAS, Tautenburg, and TRES spectrographs, and measured the mass of TOI-503b to be Mb.=.53.7.+/-.1.2 MJ. The host star has a mass of Ma.=.1.80.+/-.0.06Me, a radius of Ra.=.1.70.+/-.0.05Re, an effective temperature of Teff.=.7650.+/-.160 K, and a relatively high metallicity of 0.61.+/-.0.07 dex. We used stellar isochrones to derive the age of the system to be 180 Myr, which places its age between that of RIK 72b (a 10 Myr old BD in the Upper Scorpius stellar association) and AD 3116b (a 600 Myr old BD in the Praesepe cluster). Given the difficulty in measuring the tidal interactions between BDs and their host stars, we cannot precisely say whether this BD formed in situ or has had its orbit circularized by its host star over the relatively short age of the system. Instead, we offer an examination of plausible values for the tidal quality factor for the star and BD. TOI-503b joins a growing number of known short-period, intermediate-mass BDs orbiting mainsequence stars, and is the second such BD known to transit an A star, after HATS-70b. With the growth in the population in this regime, the driest region in the BD desert (35-55MJ sin i) is reforesting.

Subject headings and genre

NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
NATURVETENSKAP Geovetenskap och miljövetenskap Geologi hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences Geology hsv//eng
NATURVETENSKAP Geovetenskap och miljövetenskap Multidisciplinär geovetenskap hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences Geosciences, Multidisciplinary hsv//eng
Am stars
Brown dwarfs
Stellar rotation
Stellar ages
Spectroscopy
Transit photometry
Radial velocity
Stellar astronomy

Added entries (persons, corporate bodies, meetings, titles ...)

Sharma, Rishikesh (author)
Carmichael, Theron W.Harvard-Smithsonian Center for Astrophysics,Harvard University (author)
Johnson, Marshall C.Las Cumbres Observatory Global Telescope Network, Inc (author)
Gonzales, Erica J. (author)
Matthews, ElisabethMassachusetts Institute of Technology (MIT) (author)
Boffin, Henri M. J.European Southern Observatory (ESO) (author)
Brahm, RafaelPontificia Universidad Catolica de Chile,Instituto Milenio de Astrofísica,Millennium Institute of Astrophysics (author)
Chaturvedi, PriyankaThüringer Landessternwarte Tautenburg (author)
Chakraborty, Abhijit (author)
Ciardi, David R.California Institute of Technology (Caltech) (author)
Collins, Karen A.Harvard-Smithsonian Center for Astrophysics (author)
Esposito, MassimilianoThüringer Landessternwarte Tautenburg (author)
Fridlund, Malcolm,1952Chalmers tekniska högskola,Chalmers University of Technology,Universiteit Leiden (UL),Leiden University (UL)(Swepub:cth)malfri (author)
Gan, TianjunTsinghua University (author)
Gandolfi, DavideUniversita degli Studi di Torino,University of Turin (author)
Garcia, Rafael A.Paris Diderot University, France,Université Paris-Saclay,University Paris-Saclay (author)
Guenther, EikeThüringer Landessternwarte Tautenburg (author)
Hatzes, ArtieThüringer Landessternwarte Tautenburg (author)
Latham, David W.Harvard-Smithsonian Center for Astrophysics (author)
Mathis, StephaneParis Diderot University, France,Université Paris-Saclay,University Paris-Saclay (author)
Mathur, SavitaInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
Persson, Carina,1964Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)carina64 (author)
Relles, Howard M.Harvard-Smithsonian Center for Astrophysics (author)
Schlieder, Joshua E.NASA Goddard Space Flight Center (author)
Barclay, ThomasNASA Goddard Space Flight Center (author)
Dressing, Courtney D.University of California (author)
Crossfield, IanMassachusetts Institute of Technology (MIT) (author)
Howard, Andrew W.California Institute of Technology (Caltech) (author)
Rodler, FlorianEuropean Southern Observatory Santiago (author)
Zhou, GeorgeHarvard-Smithsonian Center for Astrophysics (author)
Quinn, Samuel N.Harvard-Smithsonian Center for Astrophysics (author)
Esquerdo, Gilbert A.Harvard-Smithsonian Center for Astrophysics (author)
Calkins, Michael L.Harvard-Smithsonian Center for Astrophysics (author)
Berlind, PerryHarvard-Smithsonian Center for Astrophysics (author)
Stassun, Keivan G.Vanderbilt University,Fisk University (author)
Blazek, MartinMasarykova Univerzita,Masaryk University,Czech Academy of Sciences (author)
Skarka, MarekCzech Academy of Sciences,Masarykova Univerzita,Masaryk University (author)
Spokova, MagdalenaCzech Academy of Sciences,Masarykova Univerzita,Masaryk University (author)
Zak, JiriMasarykova Univerzita,Masaryk University (author)
Albrecht, SimonÅrhus Universitet,Aarhus University (author)
Alonso Sobrino, RoiInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
Beck, PaulUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias,Karl-Franzens-Universität Graz (author)
Cabrera, JuanDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
Carleo, IlariaWesleyan University (author)
Cochran, William D.The University of Texas at Austin, USA,The University of Texas at Austin, USA (author)
Csizmadia, SzilardDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
Dai, FeiPrinceton University,Massachusetts Institute of Technology (MIT) (author)
Deeg, Hans J.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
de Leon, Jerome P.University of Tokyo, Japan (author)
Eigmueller, PhilippDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
Endl, MichaelThe University of Texas at Austin, USA,The University of Texas at Austin, USA (author)
Erikson, AndersDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
Fukui, AkihikoUniversity of Tokyo, Japan,Instituto de Astrofísica de Canarias,National Astronomical Observatory of Japan (author)
Georgieva, Iskra,1987Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)iskrag (author)
Gonzalez-Cuesta, LuciaInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
Grziwa, SaschaUniversität zu Köln,University of Cologne (author)
Hidalgo, DiegoInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
Hirano, TeruyukiTokyo Institute of Technology (author)
Hjorth, MariaKarl-Franzens-Universität Graz (author)
Knudstrup, EmilKarl-Franzens-Universität Graz (author)
Korth, JudithUniversität zu Köln,University of Cologne (author)
Lam, Kristine W. F.Technische Universität Berlin (author)
Livingston, John H.University of Tokyo, Japan (author)
Lund, Mikkel N.Århus Universitet,Aarhus University (author)
Luque, RafaelUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
Montanes Rodriguez, PilarUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
Murgas, FelipeUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
Narita, NorioInstituto de Astrofísica de Canarias,National Astronomical Observatory of Japan,Astrobiology Center, Japan,Japan Science and Technology Agency (JST) (author)
Nespral, DavidUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
Niraula, PrajwalMassachusetts Institute of Technology (MIT) (author)
Nowak, GrzegorzUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
Palle, EnricInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
Paetzold, MartinUniversität zu Köln,University of Cologne (author)
Prieto-Arranz, JorgeUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
Rauer, HeikeFreie Universität Berlin,Technische Universität Berlin,Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
Redfield, SethWesleyan University (author)
Ribas, IgnasiAgencia Estatal Consejo Superior de Investigaciones Científicas,Spanish National Research Council,Institut d'Estudis Espacials de Catalunya (IEEC),Institute of Space Studies of Catalonia (IEEC) (author)
Smith, Alexis M. S.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
Van Eylen, VincentPrinceton University (author)
Kabath, PetrCzech Academy of Sciences (author)
Czech Academy of SciencesUniverzita Karlova (creator_code:org_t)

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By the author/editor: Subjak, Jan; Sharma, Rishikes ...; Carmichael, Ther ...; Johnson, Marshal ...; Gonzales, Erica ...; Matthews, Elisab ...; show more...; Boffin, Henri M. ...; Brahm, Rafael; Chaturvedi, Priy ...; Chakraborty, Abh ...; Ciardi, David R.; Collins, Karen A ...; Esposito, Massim ...; Fridlund, Malcol ...; Gan, Tianjun; Gandolfi, Davide; Garcia, Rafael A ...; Guenther, Eike; Hatzes, Artie; Latham, David W.; Mathis, Stephane; Mathur, Savita; Persson, Carina, ...; Relles, Howard M ...; Schlieder, Joshu ...; Barclay, Thomas; Dressing, Courtn ...; Crossfield, Ian; Howard, Andrew W ...; Rodler, Florian; Zhou, George; Quinn, Samuel N.; Esquerdo, Gilber ...; Calkins, Michael ...; Berlind, Perry; Stassun, Keivan ...; Blazek, Martin; Skarka, Marek; Spokova, Magdale ...; Zak, Jiri; Albrecht, Simon; Alonso Sobrino, ...; Beck, Paul; Cabrera, Juan; Carleo, Ilaria; Cochran, William ...; Csizmadia, Szila ...; Dai, Fei; Deeg, Hans J.; de Leon, Jerome ...; Eigmueller, Phil ...; Endl, Michael; Erikson, Anders; Fukui, Akihiko; Georgieva, Iskra ...; Gonzalez-Cuesta, ...; Grziwa, Sascha; Hidalgo, Diego; Hirano, Teruyuki; Hjorth, Maria; Knudstrup, Emil; Korth, Judith; Lam, Kristine W. ...; Livingston, John ...; Lund, Mikkel N.; Luque, Rafael; Montanes Rodrigu ...; Murgas, Felipe; Narita, Norio; Nespral, David; Niraula, Prajwal; Nowak, Grzegorz; Palle, Enric; Paetzold, Martin; Prieto-Arranz, J ...; Rauer, Heike; Redfield, Seth; Ribas, Ignasi; Smith, Alexis M. ...; Van Eylen, Vince ...; Kabath, Petr; show less...

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