Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.3847/1538-3881/ab7245 |
| TOI-503: The First Known Brown-dwarf Am-star Binary from the TESS Mission | |
| Subjak, Jan1,2; Sharma, Rishikesh3; Carmichael, Theron W.4,5; Johnson, Marshall C.6; Gonzales, Erica J.7; Matthews, Elisabeth8,9; Boffin, Henri M. J.10; Brahm, Rafael11,12,13; Chaturvedi, Priyanka14; Chakraborty, Abhijit3; Ciardi, David R.15; Collins, Karen A.5; Esposito, Massimiliano14; Fridlund, Malcolm16,17; Gan, Tianjun18,19; Gandolfi, Davide20; Garcia, Rafael A.21,22; Guenther, Eike14; Hatzes, Artie14; Latham, David W.5; Mathis, Stephane21,22; Mathur, Savita23,24; Persson, Carina M.16; Relles, Howard M.5; Schlieder, Joshua E.25; Barclay, Thomas26; Dressing, Courtney D.27; Crossfield, Ian8,9; Howard, Andrew W.28; Rodler, Florian29; Zhou, George5; Quinn, Samuel N.5; Esquerdo, Gilbert A.5; Calkins, Michael L.5; Berlind, Perry5; Stassun, Keivan G.30,31; Blazek, Martin1,32; Skarka, Marek1,32; Spokova, Magdalena1,32; Zak, Jiri32; Albrecht, Simon33; Alonso Sobrino, Roi23,24; Beck, Paul23,24,34; Cabrera, Juan35; Carleo, Ilaria36,37; Cochran, William D.38,39; Csizmadia, Szilard35; Dai, Fei8,9,40; Deeg, Hans J.23,24; de Leon, Jerome P.41; Eigmueller, Philipp35; Endl, Michael38,39; Erikson, Anders35; Fukui, Akihiko42,43,44; Georgieva, Iskra16; Gonzalez-Cuesta, Lucia23,24; Grziwa, Sascha45; Hidalgo, Diego23,24; Hirano, Teruyuki46; Hjorth, Maria34; Knudstrup, Emil34; Korth, Judith45; Lam, Kristine W. F.47; Livingston, John H.41; Lund, Mikkel N.33; Luque, Rafael23,24; Montanes Rodriguez, Pilar23,24; Murgas, Felipe23,24; Narita, Norio23,42,48,49; Nespral, David23,24; Niraula, Prajwal50; Nowak, Grzegorz23,24; Palle, Enric23,24; Paetzold, Martin45; Prieto-Arranz, Jorge23,24; Rauer, Heike35,51,52; Redfield, Seth36,37; Ribas, Ignasi53,54; Smith, Alexis M. S.35; Van Eylen, Vincent40; Kabath, Petr1 | |
| 通讯作者 | Subjak, Jan |
| 来源期刊 | ASTRONOMICAL JOURNAL
 |
| ISSN | 0004-6256 |
| EISSN | 1538-3881 |
| 出版年 | 2020 |
| 卷号 | 159期号:4 |
| 英文摘要 | 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. |
| 英文关键词 | Brown dwarfs Stellar ages Am stars Spectroscopy Transit photometry Radial velocity Stellar rotation Stellar astronomy |
| 类型 | Article |
| 语种 | 英语 |
| 国家 | Czech Republic ; India ; USA ; Germany ; Chile ; Sweden ; Netherlands ; Peoples R China ; Italy ; France ; Spain ; Denmark ; Austria ; Japan |
| 开放获取类型 | Bronze, Green Published, Green Submitted, Green Accepted |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:000523657800001 |
| WOS关键词 | LINE-PROFILE TOMOGRAPHY ; TIDAL DISSIPATION ; ECLIPSING BINARY ; RADIAL-VELOCITY ; CLOSE-IN ; EXOPLANET TRANSITS ; MINI-NEPTUNE ; HOT JUPITER ; EVOLUTION ; PLANETS |
| WOS类目 | Astronomy & Astrophysics |
| WOS研究方向 | Astronomy & Astrophysics |
| 来源机构 | 清华大学 ; University of California, Berkeley |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/314110 |
| 作者单位 | 1.Czech Acad Sci, Astron Inst, Fricova 298, Ondrejov 25165, Czech Republic; 2.Charles Univ Prague, Astron Inst, V Holesovickach 2, CR-18000 Prague, Czech Republic; 3.Phys Res Lab, Astron & Astrophys Div, Ahmadabad 380009, Gujarat, India; 4.Harvard Univ, Cambridge, MA 02138 USA; 5.Harvard & Smithsonian, Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA; 6.Las Cumbres Observ, 6740 Cortona Dr,Suite 102, Goleta, CA 93117 USA; 7.Univ Calif Santa Cruz, 1156 High St, Santa Cruz, CA 95065 USA; 8.MIT, Dept Phys, Cambridge, MA 02139 USA; 9.MIT, Kavli Inst Astrophys & Space Res, 77 Massachusetts Ave, Cambridge, MA 02139 USA; 10.ESO, Karl Schwarzschild Str 2, D-85748 Garching, Germany; 11.Pontificia Univ Catolica Chile, Ctr Astroengn UC, Av Vicuna Mackenna 4860, Santiago 7820436, Chile; 12.Pontificia Univ Catolica Chile, Inst Astrofis, Av Vicuna Mackenna 4860, Santiago 7820436, Chile; 13.Millennium Inst Astrophys, Santiago, Chile; 14.Thuringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenburg, Germany; 15.CALTECH, IPAC NASA Exoplanet Sci Inst, M-S 100-22,770 S Wilson Ave, Pasadena, CA 91106 USA; 16.Chalmers Univ Technol, Dept Space Earth & Environm, Onsala Space Observ, SE-43992 Onsala, Sweden; 17.Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands; 18.Tsinghua Univ, Phys Dept, Beijing 100084, Peoples R China; 19.Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing 100084, Peoples R China; 20.Univ Torino, Dipartimento Fis, Via Pietro Giuria 1, I-10125 Turin, Italy; 21.Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France; 22.Univ Paris Diderot, Univ Paris Saclay, Sorbonne Paris Cite, AIM,CEA,CNRS, F-91191 Gif Sur Yvette, France; 23.Inst Astrofis Canarias, C Via Lactea S-N, E-38205 San Cristobal la Laguna, Spain; 24.Univ La Laguna, Dept Astrofis, E-38206 San Cristobal la Laguna, Spain; 25.NASA, Exoplanets & Stellar Astrophys Lab, Goddard Space Flight Ctr, Code 667, Greenbelt, MD 20771 USA; 26.NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA; 27.Univ Calif Berkeley, Astron Dept, Berkeley, CA 94720 USA; 28.CALTECH, Pasadena, CA 91125 USA; 29.European Southern Observ, Alonso de Cordova 3107, Santiago, Chile; 30.Vanderbilt Univ, Dept Phys & Astron, 6301 Stevenson Ctr Lane, Nashville, TN 37235 USA; 31.Fisk Univ, Dept Phys, 1000 18th Ave North, Nashville, TN 37208 USA; 32.Masaryk Univ, Dept Theoret Phys & Astrophys, Kotlarska 2, CS-61137 Brno, Czech Republic; 33.Aarhus Univ, Stellar Astrophys Ctr, Dept Phys & Astron, Ny Munkegade 120, DK-8000 Aarhus C, Denmark; 34.Karl Franzens Univ Graz, Inst Phys, Univ Pl 5, A-8020 Graz, Austria; 35.German Aerosp Ctr, Inst Planetary Res, Rutherfordstr 2, D-12489 Berlin, Germany; 36.Wesleyan Univ, Astron Dept, Middletown, CT 06459 USA; 37.Wesleyan Univ, Van Vleck Observ, Middletown, CT 06459 USA; 38.Univ Texas Austin, Dept Astron, 2515 Speedway,Stop C1400, Austin, TX 78712 USA; 39.Univ Texas Austin, McDonald Observ, 2515 Speedway,Stop C1400, Austin, TX 78712 USA; 40.Princeton Univ, Dept Astrophys Sci, 4 Ivy Lane, Princeton, NJ 08544 USA; 41.Univ Tokyo, Dept Astron, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan; 42.Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan; 43.Univ Tokyo, Grad Sch Sci, Dept Earth & Planetary Sci, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan; 44.Inst Astrofis Canarias, Via Lactea S-N, E-38205 Tenerife, Spain; 45.Univ Cologne, Rheinisches Inst Umweltforsch, Aachener Str 209, D-50931 Cologne, Germany; 46.Tokyo Inst Technol, Dept Earth & Planetary Sci, Meguro Ku, 2-12-1 Ookayama, Tokyo 1528551, Japan; 47.Tech Univ Berlin, Zentrum Astron & Astrophys, Hardenbergstr 36, D-10623 Berlin, Germany; 48.Astrobiol Ctr, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan; 49.JST, PRESTO, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan; 50.MIT, Dept Earth Atmospher & Planetary Sci, 77 Massachusetts Ave, Cambridge, MA 02139 USA; 51.TU Berlin, Ctr Astron & Astrophys, Hardenbergstr 36, D-10623 Berlin, Germany; 52.Free Univ Berlin, Inst Geol Sci, Malteserstr 74-100, D-12249 Berlin, Germany; 53.CSIC, ICE, Inst Space Sci, Campus UAB,C Can Magrans S-N, E-08193 Bellaterra, Spain; 54.IEEC, Barcelona, Spain |
| 推荐引用方式 GB/T 7714 | Subjak, Jan,Sharma, Rishikesh,Carmichael, Theron W.,et al. TOI-503: The First Known Brown-dwarf Am-star Binary from the TESS Mission[J]. 清华大学, University of California, Berkeley,2020,159(4). |
| APA | Subjak, Jan.,Sharma, Rishikesh.,Carmichael, Theron W..,Johnson, Marshall C..,Gonzales, Erica J..,...&Kabath, Petr.(2020).TOI-503: The First Known Brown-dwarf Am-star Binary from the TESS Mission.ASTRONOMICAL JOURNAL,159(4). |
| MLA | Subjak, Jan,et al."TOI-503: The First Known Brown-dwarf Am-star Binary from the TESS Mission".ASTRONOMICAL JOURNAL 159.4(2020). |
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