Subjak, Jan ORCID: 0000-0002-5313-9722, Sharma, Rishikesh ORCID: 0000-0001-8983-5300, Carmichael, Theron W., Johnson, Marshall C., Gonzales, Erica J., Matthews, Elisabeth, Boffin, Henri M. J., Brahm, Rafael, Chaturvedi, Priyanka ORCID: 0000-0002-1887-1192, Chakraborty, Abhijit, Ciardi, David R., Collins, Karen A., Esposito, Massimiliano, Fridlund, Malcolm, Gan, Tianjun, Gandolfi, Davide, Garcia, Rafael A., Guenther, Eike, Hatzes, Artie, Latham, David W., Mathis, Stephane, Mathur, Savita ORCID: 0000-0002-0129-0316, Persson, Carina M., Relles, Howard M., Schlieder, Joshua E., Barclay, Thomas, Dressing, Courtney D., Crossfield, Ian, Howard, Andrew W., Rodler, Florian, Zhou, George, Quinn, Samuel N., Esquerdo, Gilbert A., Calkins, Michael L., Berlind, Perry, Stassun, Keivan G., Blazek, Martin ORCID: 0000-0002-6586-1907, Skarka, Marek, Spokova, Magdalena, Zak, Jiri, Albrecht, Simon, Alonso Sobrino, Roi, Beck, Paul, Cabrera, Juan ORCID: 0000-0001-6653-5487, Carleo, Ilaria, Cochran, William D., Csizmadia, Szilard, Dai, Fei, Deeg, Hans J., de Leon, Jerome P., Eigmueller, Philipp, Endl, Michael, Erikson, Anders, Fukui, Akihiko, Georgieva, Iskra, Gonzalez-Cuesta, Lucia, Grziwa, Sascha, Hidalgo, Diego, Hirano, Teruyuki, Hjorth, Maria, Knudstrup, Emil ORCID: 0000-0001-7880-594X, Korth, Judith ORCID: 0000-0002-0076-6239, Lam, Kristine W. F., Livingston, John H., Lund, Mikkel N., Luque, Rafael, Montanes Rodriguez, Pilar, Murgas, Felipe, Narita, Norio, Nespral, David, Niraula, Prajwal, Nowak, Grzegorz, Palle, Enric, Paetzold, Martin, Prieto-Arranz, Jorge, Rauer, Heike, Redfield, Seth, Ribas, Ignasi ORCID: 0000-0002-6689-0312, Smith, Alexis M. S., Van Eylen, Vincent ORCID: 0000-0001-5542-8870 and Kabath, Petr (2020). TOI-503: The First Known Brown-dwarf Am-star Binary from the TESS Mission. Astron. J., 159 (4). BRISTOL: IOP PUBLISHING LTD. ISSN 1538-3881

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Abstract

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.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Subjak, JanUNSPECIFIEDorcid.org/0000-0002-5313-9722UNSPECIFIED
Sharma, RishikeshUNSPECIFIEDorcid.org/0000-0001-8983-5300UNSPECIFIED
Carmichael, Theron W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Johnson, Marshall C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gonzales, Erica J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Matthews, ElisabethUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Boffin, Henri M. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Brahm, RafaelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Chaturvedi, PriyankaUNSPECIFIEDorcid.org/0000-0002-1887-1192UNSPECIFIED
Chakraborty, AbhijitUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ciardi, David R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Collins, Karen A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Esposito, MassimilianoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fridlund, MalcolmUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gan, TianjunUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gandolfi, DavideUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Garcia, Rafael A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Guenther, EikeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hatzes, ArtieUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Latham, David W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mathis, StephaneUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mathur, SavitaUNSPECIFIEDorcid.org/0000-0002-0129-0316UNSPECIFIED
Persson, Carina M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Relles, Howard M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schlieder, Joshua E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Barclay, ThomasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dressing, Courtney D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Crossfield, IanUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Howard, Andrew W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rodler, FlorianUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zhou, GeorgeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Quinn, Samuel N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Esquerdo, Gilbert A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Calkins, Michael L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Berlind, PerryUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stassun, Keivan G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Blazek, MartinUNSPECIFIEDorcid.org/0000-0002-6586-1907UNSPECIFIED
Skarka, MarekUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Spokova, MagdalenaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zak, JiriUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Albrecht, SimonUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Alonso Sobrino, RoiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Beck, PaulUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cabrera, JuanUNSPECIFIEDorcid.org/0000-0001-6653-5487UNSPECIFIED
Carleo, IlariaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cochran, William D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Csizmadia, SzilardUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dai, FeiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Deeg, Hans J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
de Leon, Jerome P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Eigmueller, PhilippUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Endl, MichaelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Erikson, AndersUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fukui, AkihikoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Georgieva, IskraUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gonzalez-Cuesta, LuciaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Grziwa, SaschaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hidalgo, DiegoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hirano, TeruyukiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hjorth, MariaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Knudstrup, EmilUNSPECIFIEDorcid.org/0000-0001-7880-594XUNSPECIFIED
Korth, JudithUNSPECIFIEDorcid.org/0000-0002-0076-6239UNSPECIFIED
Lam, Kristine W. F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Livingston, John H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lund, Mikkel N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Luque, RafaelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Montanes Rodriguez, PilarUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Murgas, FelipeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Narita, NorioUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nespral, DavidUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Niraula, PrajwalUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nowak, GrzegorzUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Palle, EnricUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Paetzold, MartinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Prieto-Arranz, JorgeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rauer, HeikeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Redfield, SethUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ribas, IgnasiUNSPECIFIEDorcid.org/0000-0002-6689-0312UNSPECIFIED
Smith, Alexis M. S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Van Eylen, VincentUNSPECIFIEDorcid.org/0000-0001-5542-8870UNSPECIFIED
Kabath, PetrUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-339239
DOI: 10.3847/1538-3881/ab7245
Journal or Publication Title: Astron. J.
Volume: 159
Number: 4
Date: 2020
Publisher: IOP PUBLISHING LTD
Place of Publication: BRISTOL
ISSN: 1538-3881
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
LINE-PROFILE TOMOGRAPHY; TIDAL DISSIPATION; ECLIPSING BINARY; RADIAL-VELOCITY; CLOSE-IN; EXOPLANET TRANSITS; MINI-NEPTUNE; HOT JUPITER; EVOLUTION; PLANETSMultiple languages
Astronomy & AstrophysicsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/33923

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