Discovery of a young low-mass brown dwarf transiting a fast-rotating F-type star by the Galactic Plane eXoplanet (GPX) survey

被引：14

作者：

Benni, P. ^{[1
]}

Burdanov, A. Y. ^{[2
,3
]}

Krushinsky, V. V. ^{[4
]}

Bonfanti, A. ^{[5
,6
]}

Hebrard, G. ^{[7
,8
]}

Almenara, J. M. ^{[9
]}

Dalal, S. ^{[7
]}

Demangeon, O. D. S. ^{[10
]}

Tsantaki, M. ^{[11
]}

Pepper, J. ^{[12
]}

Stassun, K. G. ^{[13
]}

Vanderburg, A. ^{[14
]}

Belinski, A. ^{[15
]}

Kashaev, F. ^{[16
]}

Barkaoui, K. ^{[17
,18
]}

Kim, T. ^{[19
]}

Kang, W. ^{[19
]}

Antonyuk, K. ^{[20
]}

Dyachenko, V. V. ^{[21
]}

Rastegaev, D. A. ^{[21
]}

Beskakotov, A. ^{[21
,22
]}

Mitrofanova, A. A. ^{[21
]}

Pozuelos, F. J. ^{[6
,17
]}

Kuznetsov, E. D. ^{[23
]}

Popov, A. ^{[23
]}

Kiefer, F. ^{[7
]}

Wilson, P. A. ^{[24
,25
]}

Ricker, G. ^{[26
,27
]}

Vanderspek, R. ^{[26
,27
]}

Latham, D. W. ^{[28
]}

Seager, S. ^{[2
,26
,27
,29
]}

Jenkins, J. M. ^{[30
]}

Sokov, E. ^{[22
,31
]}

Sokova, I ^{[22
,31
]}

Marchini, A. ^{[32
]}

Papini, R. ^{[33
]}

Salvaggio, F. ^{[33
]}

Banfi, M. ^{[33
]}

Basturk, O. ^{[34
]}

Torun, S. ^{[34
]}

Yalcinkaya, S. ^{[34
]}

Ivanov, K. ^{[35
]}

Valyavin, G. ^{[20
,21
,22
]}

Jehin, E. ^{[6
]}

Gillon, M. ^{[17
]}

Pakstiene, E. ^{[36
]}

Hentunen, V-P ^{[37
]}

Shadick, S. ^{[38
]}

Bretton, M. ^{[39
]}

Wunsche, A. ^{[39
]}

机构：

[1] Acton Sky Portal Private Observ, Acton, MA 01720 USA

[2] MIT, Dept Earth Atmospher & Planetary Sci, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[3] Inst Astrofis Canarias, Via Lactea S-N, E-38205 Tenerife, Spain

[4] Ural Fed Univ, Lab Astrochem Res, Mira St 19, Ekaterinburg 620002, Russia

[5] Austrian Acad Sci, Space Res Inst, Schmiedlstr 6, A-8042 Graz, Austria

[6] Univ Liege, Space Sci Technol & Astrophys Res STAR Inst, Allee 6 Aout 17, B-4000 Liege, Belgium

[7] Univ Paris 06, Inst Astrophys Paris, UMR7095 CNRS, 98bis Blvd Arago, F-75014 Paris, France

[8] Univ Aix Marseille, Observ Haute Provence, CNRS, F-04870 St Michell Observatoire, France

[9] Univ Grenoble Alpes, IPAG, CNRS, F-38000 Grenoble, France

[10] Univ Porto, Inst Astrofis & Ciencias Espaco, CAUP, Rua Estrelas, P-4150762 Porto, Portugal

[11] INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy

[12] Lehigh Univ, Dept Phys, 16 Mem Dr East, Bethlehem, PA 18015 USA

[13] Vanderbilt Univ, Dept Phys & Astron, 6301 Stevenson Ctr Ln, Nashville, TN 37235 USA

[14] Univ Texas Austin, Dept Astron, Austin, TX 78712 USA

[15] Moscow MV Lomonosov State Univ, Sternberg Astron Inst, 13 Univ Skij Pr, Moscow 119234, Russia

[16] Moscow MV Lomonosov State Univ, Fac Phys, Leninskie Gory 1, Moscow 119991, Russia

[17] Univ Liege, Astrobiol Res Unit, Allee 6 Aout 19C, B-4000 Liege, Belgium

[18] Cadi Ayyad Univ, Oukaimeden Observ, High Energy Phys & Astrophys Lab, Marrakech 40000, Morocco

[19] Natl Youth Space Ctr, Goheung 59567, Jeollanam Do, South Korea

[20] RAS, Fed State Budget Sci Inst Crimean Astrophys Obser, Nauchny 298409, Crimea, Russia

[21] Russian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 369167, Russia

[22] St Petersburg State Univ, Fac Math & Mech, Univ Skij Pr 28, St Petersburg 198504, Russia

[23] Ural Fed Univ, Mira St 19, Ekaterinburg 620002, Russia

[24] Univ Warwick, Ctr Exoplanets & Habitabil, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands, England

[25] Univ Warwick, Dept Phys, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands, England

[26] MIT, Dept Phys, Cambridge, MA 02139 USA

[27] MIT, Kavli Inst Astrophys & Space Res, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[28] Ctr Astrophys Harvard & Smithsonian, 60 Garden St, Cambridge, MA 02138 USA

[29] MIT, Dept Aeronaut & Astronaut Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[30] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA

[31] Russian Acad Sci, Cent Astron Observ Pulkovo, Pulkovskoje Shosse D 65, St Petersburg 196140, Russia

[32] Univ Siena, Astron Observ DSFTA, Via Roma 56, I-53100 Siena, Italy

[33] Wild Boar Remote Observ, I-50026 San Casciano In Val Pesa, FI, Italy

[34] Ankara Univ, Fac Sci, Dept Astron & Space Sci, TR-06100 Ankara, Turkey

[35] Irkutsk State Univ, K Marx Str 1, Irkutsk 664003, Russia

[36] Vilnius Univ, Inst Theoret Phys & Astron, Sauletekio Al 3, LT-10257 Vilnius, Lithuania

[37] Taurus Hill Observ, Harkamaentie 88, FI-79480 Varkaus, Finland

[38] Univ Saskatchewan, Phys & Engn Phys Dept, Saskatoon, SK S7N 5E2, Canada

[39] Baronnies Provencales Observ, Hautes Alpes Parc Nat Reg Baronnies Provencales, E-05150, Moydans, France

[40] GJP Private Observ, Elgin, OR 97827 USA

[41] Rasteau Observ, F-84110 Rasteau, France

[42] Anunaki Observ, Manzanares El Real 28410, Spain

[43] Grand Pra Private Observ, CH-1984 Les Hauderes, Switzerland

[44] Observ Ca lOu, E-08282 St Marti Sesgueioles, Spain

[45] Observ Montcabrer, C Jaume Balmes 24, E-08348 Cabrils, Spain

[46] Brigham Young Univ, Dept Phys & Astron, Provo, UT 84602 USA

[47] Penn State Univ, Ctr Exoplanets & Habitable Worlds, 525 Davey Lab, University Pk, PA 16802 USA

[48] Penn State Univ, Dept Astron & Astrophys, 525 Davey Lab, University Pk, PA 16802 USA

[49] Swarthmore Coll, Dept Phys & Astron, 500 Coll Ave, Swarthmore, PA 19081 USA

[50] NASA, Goddard Space Flight Ctr, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2021年 / 505卷 / 04期

基金：

俄罗斯科学基金会; 美国国家航空航天局;

关键词：

stars: brown dwarfs; stars: individual: GPX-1; stars: rotation; surveys: Astronomical Data bases; Galaxy: disc; EVOLUTIONARY MODELS; SEARCH; COMPANIONS; DESERT; CLUSTERS; BINARY; KEPLER; K2;

D O I：

10.1093/mnras/stab1567

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We announce the discovery of GPX-1 b, a transiting brown dwarf with a mass of 19.7 +/- 1.6 M-Jup and a radius of 1.47 +/- 0.10 R-Jup, the first substellar object discovered by the Galactic Plane eXoplanet (GPX) survey. The brown dwarf transits a moderately bright (V = 12.3 mag) fast-rotating F-type star with a projected rotational velocity v sin i(*) = 40 +/- 10 km s(-1). We use the isochrone placement algorithm to characterize the host star, which has effective temperature 7000 +/- 200 K, mass 1.68 +/- 0.10 M-circle dot, radius 1.56 +/- 0.10 R-circle dot, and approximate age 0.27(-0.15)(+0.09) Gyr. GPX-1 b has an orbital period of similar to 1.75 d and a transit depth of 0.90 +/- 0.03 per cent. We describe the GPX transit detection observations, subsequent photometric and speckle-interferometric follow-up observations, and SOPHIE spectroscopic measurements, which allowed us to establish the presence of a substellar object around the host star. GPX-1 was observed at 30-min integrations by TESS in Sector 18, but the data are affected by blending with a 3.4 mag brighter star 42 arcsec away. GPX-1 b is one of about two dozen transiting brown dwarfs known to date, with a mass close to the theoretical brown dwarf/gas giant planet mass transition boundary. Since GPX-1 is a moderately bright and fast-rotating star, it can be followed-up by the means of the Doppler tomography.

引用

页码：4956 / 4967

页数：12

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