| ŠUBJAK, Ján, Rishikesh SHARMA, Theron W. CARMICHAEL, Marshall C. JOHNSON, Erica J. GONZALES, Elisabeth MATTHEWS, Henri M. J. BOFFIN, Rafael BRAHM, Priyanka CHATURVEDI, Abhijit CHAKRABORTY, David R. CIARDI, Karen A. COLLINS, Massimiliano ESPOSITO, Malcolm FRIDLUND, Tianjun GAN, Davide GANDOLFI, Rafael A. GARCIA, Eike GUENTHER, Artie HATZES, David W. LATHAM, Stephane MATHIS, 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, Martin BLAŽEK, Marek SKARKA, Magdalena ŠPOKOVÁ, Jiří ŽÁK, Simon ALBRECHT, Roi ALONSO SOBRINO, Paul BECK, Juan CABRERA, Ilaria CARLEO, William D. COCHRAN, Szilard CSIZMADIA, Fei DAI, Hans J. DEEG, Jerome P. DE LEON, Philipp EIGMULLER, Michael ENDL, Anders ERIKSON, Akihiko FUKUI, Iskra GEORGIEVA, Lucia GONZALEZ-CUESTA, Sascha GRZIWA, Diego HIDALGO, Teruyuki HIRANO, Maria HJORTH, Emil KNUDSTRUP, Judith KORTH, Kristine W. F. LAM, John H. LIVINGSTON, Mikkel N. LUND, Rafael LUQUE, Pilar MONTANES RODRIGUEZ, Felipe MURGAS, Norio NARITA, David NESPRAL, Prajwal NIRAULA, Grzegorz NOWAK, Enric PALLE, Martin PATZOLD, Jorge PRIETO-ARRANZ, Heike RAUER, Seth REDFIELD, Ignasi RIBAS, Alexis M. S. SMITH, Vincent VAN EYLEN a Petr KABATH. TOI-503: The First Known Brown-dwarf Am-star Binary from the TESS Mission. Astronomical Journal. Bristol: IOP Publishing, roč. 159, č. 4, s. 1-19. ISSN 0004-6256. doi:10.3847/1538-3881/ab7245. 2020. |
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@article{1632216,
author = {Šubjak, Ján and Sharma, Rishikesh and Carmichael, Theron W. and Johnson, Marshall C. and Gonzales, Erica J. and Matthews, Elisabeth and Boffin, Henri M. J. and Brahm, Rafael and Chaturvedi, Priyanka and Chakraborty, Abhijit and Ciardi, David R. and Collins, Karen A. and Esposito, Massimiliano and Fridlund, Malcolm and Gan, Tianjun and Gandolfi, Davide and Garcia, Rafael A. and Guenther, Eike and Hatzes, Artie and Latham, David W. and Mathis, Stephane and Mathur, Savita and Persson, Carina M. and Relles, Howard M. and Schlieder, Joshua E. and Barclay, Thomas and Dressing, Courtney D. and Crossfield, Ian and Howard, Andrew W. and Rodler, Florian and Zhou, George and Quinn, Samuel N. and Esquerdo, Gilbert A. and Calkins, Michael L. and Berlind, Perry and Stassun, Keivan G. and Blažek, Martin and Skarka, Marek and Špoková, Magdalena and Žák, Jiří and Albrecht, Simon and Alonso Sobrino, Roi and Beck, Paul and Cabrera, Juan and Carleo, Ilaria and Cochran, William D. and Csizmadia, Szilard and Dai, Fei and Deeg, Hans J. and de Leon, Jerome P. and Eigmuller, Philipp and Endl, Michael and Erikson, Anders and Fukui, Akihiko and Georgieva, Iskra and GonzalezandCuesta, Lucia and Grziwa, Sascha and Hidalgo, Diego and Hirano, Teruyuki and Hjorth, Maria and Knudstrup, Emil and Korth, Judith and Lam, Kristine W. F. and Livingston, John H. and Lund, Mikkel N. and Luque, Rafael and Montanes Rodriguez, Pilar and Murgas, Felipe and Narita, Norio and Nespral, David and Niraula, Prajwal and Nowak, Grzegorz and Palle, Enric and Patzold, Martin and PrietoandArranz, Jorge and Rauer, Heike and Redfield, Seth and Ribas, Ignasi and Smith, Alexis M. S. and Van Eylen, Vincent and Kabath, Petr},
article_location = {Bristol},
article_number = {4},
doi = {http://dx.doi.org/10.3847/1538-3881/ab7245},
keywords = {Brown dwarfs; Stellar ages; Am stars; Spectroscopy; Transit photometry; Radial velocity; Stellar rotation; Stellar astronomy},
language = {eng},
issn = {0004-6256},
journal = {Astronomical Journal},
title = {TOI-503: The First Known Brown-dwarf Am-star Binary from the TESS Mission},
url = {https://iopscience.iop.org/article/10.3847/1538-3881/ab7245},
volume = {159},
year = {2020}
}
TY - JOUR
ID - 1632216
AU - Šubjak, Ján - Sharma, Rishikesh - Carmichael, Theron W. - Johnson, Marshall C. - Gonzales, Erica J. - Matthews, Elisabeth - Boffin, Henri M. J. - Brahm, Rafael - Chaturvedi, Priyanka - 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 - 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. - Blažek, Martin - Skarka, Marek - Špoková, Magdalena - Žák, Jiří - Albrecht, Simon - Alonso Sobrino, Roi - Beck, Paul - Cabrera, Juan - Carleo, Ilaria - Cochran, William D. - Csizmadia, Szilard - Dai, Fei - Deeg, Hans J. - de Leon, Jerome P. - Eigmuller, Philipp - Endl, Michael - Erikson, Anders - Fukui, Akihiko - Georgieva, Iskra - Gonzalez-Cuesta, Lucia - Grziwa, Sascha - Hidalgo, Diego - Hirano, Teruyuki - Hjorth, Maria - Knudstrup, Emil - Korth, Judith - 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 - Patzold, Martin - Prieto-Arranz, Jorge - Rauer, Heike - Redfield, Seth - Ribas, Ignasi - Smith, Alexis M. S. - Van Eylen, Vincent - Kabath, Petr
PY - 2020
TI - TOI-503: The First Known Brown-dwarf Am-star Binary from the TESS Mission
JF - Astronomical Journal
VL - 159
IS - 4
SP - 1-19
EP - 1-19
PB - IOP Publishing
SN - 00046256
KW - Brown dwarfs
KW - Stellar ages
KW - Am stars
KW - Spectroscopy
KW - Transit photometry
KW - Radial velocity
KW - Stellar rotation
KW - Stellar astronomy
UR - https://iopscience.iop.org/article/10.3847/1538-3881/ab7245
L2 - https://iopscience.iop.org/article/10.3847/1538-3881/ab7245
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 ( = 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.
ER -
ŠUBJAK, Ján, Rishikesh SHARMA, Theron W. CARMICHAEL, Marshall C. JOHNSON, Erica J. GONZALES, Elisabeth MATTHEWS, Henri M. J. BOFFIN, Rafael BRAHM, Priyanka CHATURVEDI, Abhijit CHAKRABORTY, David R. CIARDI, Karen A. COLLINS, Massimiliano ESPOSITO, Malcolm FRIDLUND, Tianjun GAN, Davide GANDOLFI, Rafael A. GARCIA, Eike GUENTHER, Artie HATZES, David W. LATHAM, Stephane MATHIS, 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, Martin BLAŽEK, Marek SKARKA, Magdalena ŠPOKOVÁ, Jiří ŽÁK, Simon ALBRECHT, Roi ALONSO SOBRINO, Paul BECK, Juan CABRERA, Ilaria CARLEO, William D. COCHRAN, Szilard CSIZMADIA, Fei DAI, Hans J. DEEG, Jerome P. DE LEON, Philipp EIGMULLER, Michael ENDL, Anders ERIKSON, Akihiko FUKUI, Iskra GEORGIEVA, Lucia GONZALEZ-CUESTA, Sascha GRZIWA, Diego HIDALGO, Teruyuki HIRANO, Maria HJORTH, Emil KNUDSTRUP, Judith KORTH, Kristine W. F. LAM, John H. LIVINGSTON, Mikkel N. LUND, Rafael LUQUE, Pilar MONTANES RODRIGUEZ, Felipe MURGAS, Norio NARITA, David NESPRAL, Prajwal NIRAULA, Grzegorz NOWAK, Enric PALLE, Martin PATZOLD, Jorge PRIETO-ARRANZ, Heike RAUER, Seth REDFIELD, Ignasi RIBAS, Alexis M. S. SMITH, Vincent VAN EYLEN a Petr KABATH. TOI-503: The First Known Brown-dwarf Am-star Binary from the TESS Mission. \textit{Astronomical Journal}. Bristol: IOP Publishing, roč.~159, č.~4, s.~1-19. ISSN~0004-6256. doi:10.3847/1538-3881/ab7245. 2020.
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