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

Ján Šubjak; Ján Šubjak; Rishikesh Sharma; Theron W. Carmichael; Theron W. Carmichael; Marshall C. Johnson; Erica J. Gonzales; Elisabeth Matthews; Henri M.J. Boffin; Rafael Brahm; Rafael Brahm; Rafael Brahm; Priyanka Chaturvedi; Abhijit Chakraborty; David R. Ciardi; Karen A. Collins; Massimiliano Esposito; Malcolm Fridlund; Malcolm Fridlund; Tianjun Gan; Davide Gandolfi; Rafael A. Garciá; Rafael A. Garciá; Eike Guenther; Artie Hatzes; David W. Latham; Stéphane Mathis; Stéphane Mathis; Savita Mathur; Savita Mathur; Carina M. Persson; Howard M. Relles; Joshua E. Schlieder; Thomas Barclay; Courtney D. Dressing; Ian Crossfield; Andrew W. Howard; Florian Rodler; George Zhou; Samuel N. Quinn; Gilbert A. Esquerdo; Michael L. Calkins; Perry Berlind; Keivan G. Stassun; Keivan G. Stassun; Martin Blažek; Martin Blažek; Marek Skarka; Marek Skarka; Magdalena Špoková; Magdalena Špoková; Jirí Žák; Simon Albrecht; Roi Alonso Sobrino; Roi Alonso Sobrino; Paul Beck; Paul Beck; Paul Beck; Juan Cabrera; Ilaria Carleo; William D. Cochran; Szilard Csizmadia; Fei Dai; Fei Dai; Hans J. Deeg; Hans J. Deeg; Jerome P. De Leon; Philipp Eigmüller; Michael Endl; Anders Erikson; Akihiko Fukui; Akihiko Fukui; Akihiko Fukui; Iskra Georgieva; Luciá González-Cuesta; Luciá González-Cuesta; Sascha Grziwa; Diego Hidalgo; Diego Hidalgo; Teruyuki Hirano; Maria Hjorth; Emil Knudstrup; Judith Korth; Kristine W.F. Lam; John H. Livingston; Mikkel N. Lund; Rafael Luque; Rafael Luque; Pilar Montanes Rodríguez; Pilar Montanes Rodríguez; Felipe Murgas; Felipe Murgas; Norio Narita; Norio Narita; Norio Narita; Norio Narita; David Nespral; David Nespral; Prajwal Niraula; Grzegorz Nowak; Grzegorz Nowak; Enric Pallé; Enric Pallé; Martin Pätzold; Jorge Prieto-Arranz; Jorge Prieto-Arranz; Heike Rauer; Heike Rauer; Heike Rauer; Seth Redfield; Ignasi Ribas; Ignasi Ribas; Alexis M.S. Smith; Vincent Van Eylen; Petr Kabáth

doi:10.3847/1538-3881/ab7245

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

Ján Šubjak, Ján Šubjak, Rishikesh Sharma, Theron W. Carmichael, Theron W. Carmichael, Marshall C. Johnson, Erica J. Gonzales, Elisabeth Matthews, Henri M.J. Boffin, Rafael Brahm, Rafael Brahm, Rafael Brahm, Priyanka Chaturvedi, Abhijit Chakraborty, David R. Ciardi, Karen A. Collins, Massimiliano Esposito, Malcolm Fridlund, Malcolm Fridlund, Tianjun GanDavide Gandolfi, Rafael A. Garciá, Rafael A. Garciá, Eike Guenther, Artie Hatzes, David W. Latham, Stéphane Mathis, Stéphane Mathis, Savita Mathur, Savita Mathur, Carina M. Persson, Howard M. Relles, Joshua E. Schlieder, Thomas Barclay, Courtney D. Dressing, Ian Crossfield, Andrew W. Howard, Florian Rodler, George Zhou, Samuel N. Quinn, Gilbert A. Esquerdo, Michael L. Calkins, Perry Berlind, Keivan G. Stassun, Keivan G. Stassun, Martin Blažek, Martin Blažek, Marek Skarka, Marek Skarka, Magdalena Špoková, Magdalena Špoková, Jirí Žák, Simon Albrecht, Roi Alonso Sobrino, Roi Alonso Sobrino, Paul Beck, Paul Beck, Paul Beck, Juan Cabrera, Ilaria Carleo, William D. Cochran, Szilard Csizmadia, Fei Dai, Fei Dai, Hans J. Deeg, Hans J. Deeg, Jerome P. De Leon, Philipp Eigmüller, Michael Endl, Anders Erikson, Akihiko Fukui, Akihiko Fukui, Akihiko Fukui, Iskra Georgieva, Luciá González-Cuesta, Luciá González-Cuesta, Sascha Grziwa, Diego Hidalgo, Diego Hidalgo, Teruyuki Hirano, Maria Hjorth, Emil Knudstrup, Judith Korth, Kristine W.F. Lam, John H. Livingston, Mikkel N. Lund, Rafael Luque, Rafael Luque, Pilar Montanes Rodríguez, Pilar Montanes Rodríguez, Felipe Murgas, Felipe Murgas, Norio Narita, Norio Narita, Norio Narita, Norio Narita, David Nespral, David Nespral, Prajwal Niraula, Grzegorz Nowak, Grzegorz Nowak, Enric Pallé, Enric Pallé, Martin Pätzold, Jorge Prieto-Arranz, Jorge Prieto-Arranz, Heike Rauer, Heike Rauer, Heike Rauer, Seth Redfield, Ignasi Ribas, Ignasi Ribas, Alexis M.S. Smith, Vincent Van Eylen, Petr Kabáth

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

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 . We obtained high-resolution spectroscopic observations with the FIES, Ondrejov, PARAS, Tautenburg, and TRES spectrographs, and measured the mass of TOI-503b to be M b = 53.7 ± 1.2 a radius of R = 1.70 ± 0.05R o, an effective temperature of T eff = 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 main-sequence 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 is reforesting.

Originalsprog	Engelsk
Artikelnummer	151
Tidsskrift	Astronomical Journal
Vol/bind	159
Nummer	4
ISSN	0004-6256
DOI	https://doi.org/10.3847/1538-3881/ab7245
Status	Udgivet - apr. 2020

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10.3847/1538-3881/ab7245

https://arxiv.org/pdf/1909.07984v3.pdf

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Šubjak, J., Šubjak, J., Sharma, R., Carmichael, T. W., Carmichael, T. W., Johnson, M. C., Gonzales, E. J., Matthews, E., Boffin, H. M. J., Brahm, R., Brahm, R., Brahm, R., Chaturvedi, P., Chakraborty, A., Ciardi, D. R., Collins, K. A., Esposito, M., Fridlund, M., Fridlund, M., ... Kabáth, P. (2020). TOI-503: The First Known Brown-dwarf Am-star Binary from the TESS Mission. Astronomical Journal, 159(4), Artikel 151. https://doi.org/10.3847/1538-3881/ab7245

@article{e333fb2f284d412ea12dca7314fa8619,

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

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 . We obtained high-resolution spectroscopic observations with the FIES, Ondrejov, PARAS, Tautenburg, and TRES spectrographs, and measured the mass of TOI-503b to be M b = 53.7 ± 1.2 a radius of R = 1.70 ± 0.05R o, an effective temperature of T eff = 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 main-sequence 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 is reforesting.",

author = "J{\'a}n {\v S}ubjak and J{\'a}n {\v S}ubjak and Rishikesh Sharma and Carmichael, {Theron W.} and Carmichael, {Theron W.} and Johnson, {Marshall C.} and Gonzales, {Erica J.} and Elisabeth Matthews and Boffin, {Henri M.J.} and Rafael Brahm and Rafael Brahm and Rafael Brahm and Priyanka Chaturvedi and Abhijit Chakraborty and Ciardi, {David R.} and Collins, {Karen A.} and Massimiliano Esposito and Malcolm Fridlund and Malcolm Fridlund and Tianjun Gan and Davide Gandolfi and Garci{\'a}, {Rafael A.} and Garci{\'a}, {Rafael A.} and Eike Guenther and Artie Hatzes and Latham, {David W.} and St{\'e}phane Mathis and St{\'e}phane Mathis and Savita Mathur and Savita Mathur and Persson, {Carina M.} and Relles, {Howard M.} and Schlieder, {Joshua E.} and Thomas Barclay and Dressing, {Courtney D.} and Ian Crossfield and Howard, {Andrew W.} and Florian Rodler and George Zhou and Quinn, {Samuel N.} and Esquerdo, {Gilbert A.} and Calkins, {Michael L.} and Perry Berlind and {G. Stassun}, Keivan and {G. Stassun}, Keivan and Martin Bla{\v z}ek and Martin Bla{\v z}ek and Marek Skarka and Marek Skarka and Magdalena {\v S}pokov{\'a} and Magdalena {\v S}pokov{\'a} and Jir{\'i} {\v Z}{\'a}k and Simon Albrecht and Sobrino, {Roi Alonso} and Sobrino, {Roi Alonso} and Paul Beck and Paul Beck and Paul Beck and Juan Cabrera and Ilaria Carleo and Cochran, {William D.} and Szilard Csizmadia and Fei Dai and Fei Dai and Deeg, {Hans J.} and Deeg, {Hans J.} and {De Leon}, {Jerome P.} and Philipp Eigm{\"u}ller and Michael Endl and Anders Erikson and Akihiko Fukui and Akihiko Fukui and Akihiko Fukui and Iskra Georgieva and Luci{\'a} Gonz{\'a}lez-Cuesta and Luci{\'a} Gonz{\'a}lez-Cuesta and Sascha Grziwa and Diego Hidalgo and Diego Hidalgo and Teruyuki Hirano and Maria Hjorth and Emil Knudstrup and Judith Korth and Lam, {Kristine W.F.} and Livingston, {John H.} and Lund, {Mikkel N.} and Rafael Luque and Rafael Luque and Rodr{\'i}guez, {Pilar Montanes} and Rodr{\'i}guez, {Pilar Montanes} and Felipe Murgas and Felipe Murgas and Norio Narita and Norio Narita and Norio Narita and Norio Narita and David Nespral and David Nespral and Prajwal Niraula and Grzegorz Nowak and Grzegorz Nowak and Enric Pall{\'e} and Enric Pall{\'e} and Martin P{\"a}tzold and Jorge Prieto-Arranz and Jorge Prieto-Arranz and Heike Rauer and Heike Rauer and Heike Rauer and Seth Redfield and Ignasi Ribas and Ignasi Ribas and Smith, {Alexis M.S.} and Eylen, {Vincent Van} and Petr Kab{\'a}th",

year = "2020",

month = apr,

doi = "10.3847/1538-3881/ab7245",

language = "English",

volume = "159",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "Institute of Physics Publishing, Inc",

number = "4",

}

Šubjak, J, Šubjak, J, Sharma, R, Carmichael, TW, Carmichael, TW, Johnson, MC, Gonzales, EJ, Matthews, E, Boffin, HMJ, Brahm, R, Brahm, R, Brahm, R, Chaturvedi, P, Chakraborty, A, Ciardi, DR, Collins, KA, Esposito, M, Fridlund, M, Fridlund, M, Gan, T, Gandolfi, D, Garciá, RA, Garciá, RA, Guenther, E, Hatzes, A, Latham, DW, Mathis, S, Mathis, S, Mathur, S, Mathur, S, Persson, CM, Relles, HM, Schlieder, JE, Barclay, T, Dressing, CD, Crossfield, I, Howard, AW, Rodler, F, Zhou, G, Quinn, SN, Esquerdo, GA, Calkins, ML, Berlind, P, G. Stassun, K, G. Stassun, K, Blažek, M, Blažek, M, Skarka, M, Skarka, M, Špoková, M, Špoková, M, Žák, J, Albrecht, S, Sobrino, RA, Sobrino, RA, Beck, P, Beck, P, Beck, P, Cabrera, J, Carleo, I, Cochran, WD, Csizmadia, S, Dai, F, Dai, F, Deeg, HJ, Deeg, HJ, De Leon, JP, Eigmüller, P, Endl, M, Erikson, A, Fukui, A, Fukui, A, Fukui, A, Georgieva, I, González-Cuesta, L, González-Cuesta, L, Grziwa, S, Hidalgo, D, Hidalgo, D, Hirano, T, Hjorth, M, Knudstrup, E, Korth, J, Lam, KWF, Livingston, JH, Lund, MN, Luque, R, Luque, R, Rodríguez, PM, Rodríguez, PM, Murgas, F, Murgas, F, Narita, N, Narita, N, Narita, N, Narita, N, Nespral, D, Nespral, D, Niraula, P, Nowak, G, Nowak, G, Pallé, E, Pallé, E, Pätzold, M, Prieto-Arranz, J, Prieto-Arranz, J, Rauer, H, Rauer, H, Rauer, H, Redfield, S, Ribas, I, Ribas, I, Smith, AMS, Eylen, VV & Kabáth, P 2020, 'TOI-503: The First Known Brown-dwarf Am-star Binary from the TESS Mission', Astronomical Journal, bind 159, nr. 4, 151. https://doi.org/10.3847/1538-3881/ab7245

TY - JOUR

T1 - TOI-503

T2 - The First Known Brown-dwarf Am-star Binary from the TESS Mission

AU - Šubjak, Ján

AU - Sharma, Rishikesh

AU - Carmichael, Theron W.

AU - Johnson, Marshall C.

AU - Gonzales, Erica J.

AU - Matthews, Elisabeth

AU - Boffin, Henri M.J.

AU - Brahm, Rafael

AU - Chaturvedi, Priyanka

AU - Chakraborty, Abhijit

AU - Ciardi, David R.

AU - Collins, Karen A.

AU - Esposito, Massimiliano

AU - Fridlund, Malcolm

AU - Gan, Tianjun

AU - Gandolfi, Davide

AU - Garciá, Rafael A.

AU - Guenther, Eike

AU - Hatzes, Artie

AU - Latham, David W.

AU - Mathis, Stéphane

AU - Mathur, Savita

AU - Persson, Carina M.

AU - Relles, Howard M.

AU - Schlieder, Joshua E.

AU - Barclay, Thomas

AU - Dressing, Courtney D.

AU - Crossfield, Ian

AU - Howard, Andrew W.

AU - Rodler, Florian

AU - Zhou, George

AU - Quinn, Samuel N.

AU - Esquerdo, Gilbert A.

AU - Calkins, Michael L.

AU - Berlind, Perry

AU - G. Stassun, Keivan

AU - Blažek, Martin

AU - Skarka, Marek

AU - Špoková, Magdalena

AU - Žák, Jirí

AU - Albrecht, Simon

AU - Sobrino, Roi Alonso

AU - Beck, Paul

AU - Cabrera, Juan

AU - Carleo, Ilaria

AU - Cochran, William D.

AU - Csizmadia, Szilard

AU - Dai, Fei

AU - Deeg, Hans J.

AU - De Leon, Jerome P.

AU - Eigmüller, Philipp

AU - Endl, Michael

AU - Erikson, Anders

AU - Fukui, Akihiko

AU - Georgieva, Iskra

AU - González-Cuesta, Luciá

AU - Grziwa, Sascha

AU - Hidalgo, Diego

AU - Hirano, Teruyuki

AU - Hjorth, Maria

AU - Knudstrup, Emil

AU - Korth, Judith

AU - Lam, Kristine W.F.

AU - Livingston, John H.

AU - Lund, Mikkel N.

AU - Luque, Rafael

AU - Rodríguez, Pilar Montanes

AU - Murgas, Felipe

AU - Narita, Norio

AU - Nespral, David

AU - Niraula, Prajwal

AU - Nowak, Grzegorz

AU - Pallé, Enric

AU - Pätzold, Martin

AU - Prieto-Arranz, Jorge

AU - Rauer, Heike

AU - Redfield, Seth

AU - Ribas, Ignasi

AU - Smith, Alexis M.S.

AU - Eylen, Vincent Van

AU - Kabáth, Petr

PY - 2020/4

Y1 - 2020/4

N2 - 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 . We obtained high-resolution spectroscopic observations with the FIES, Ondrejov, PARAS, Tautenburg, and TRES spectrographs, and measured the mass of TOI-503b to be M b = 53.7 ± 1.2 a radius of R = 1.70 ± 0.05R o, an effective temperature of T eff = 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 main-sequence 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 is reforesting.

AB - 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 . We obtained high-resolution spectroscopic observations with the FIES, Ondrejov, PARAS, Tautenburg, and TRES spectrographs, and measured the mass of TOI-503b to be M b = 53.7 ± 1.2 a radius of R = 1.70 ± 0.05R o, an effective temperature of T eff = 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 main-sequence 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 is reforesting.

UR - http://www.scopus.com/inward/record.url?scp=85086514717&partnerID=8YFLogxK

U2 - 10.3847/1538-3881/ab7245

DO - 10.3847/1538-3881/ab7245

M3 - Journal article

AN - SCOPUS:85086514717

SN - 0004-6256

VL - 159

JO - Astronomical Journal

JF - Astronomical Journal

IS - 4

M1 - 151

ER -

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

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