干旱区生态环境知识资源中心(Arid): Populating the brown dwarf and stellar boundary: Five stars with transiting companions near the hydrogen-burning mass limit

Arid

DOI	10.1051/0004-6361/202141145
	Populating the brown dwarf and stellar boundary: Five stars with transiting companions near the hydrogen-burning mass limit
	Grieves, Nolan; Bouchy, Francois; Lendl, Monika; Carmichael, Theron; Mireles, Ismael; Shporer, Avi; McLeod, Kim K.; Collins, Karen A.; Brahm, Rafael; Stassun, Keivan G.; Gill, Sam; Bouma, Luke G.; Guillot, Tristan; Cointepas, Marion; Dos Santos, Leonardo A.; Casewell, Sarah L.; Jenkins, Jon M.; Henning, Thomas; Nielsen, Louise D.; Psaridi, Angelica; Udry, Stephane; Segransan, Damien; Eastman, Jason D.; Zhou, George; Abe, Lyu; Agabi, Abelkrim; Bakos, Gaspar; Charbonneau, David; Collins, Kevin, I; Colon, Knicole D.; Crouzet, Nicolas; Dransfield, Georgina; Evans, Phil; Goeke, Robert F.; Hart, Rhodes; Irwin, Jonathan M.; Jensen, Eric L. N.; Jordan, Andres; Kielkopf, John F.; Latham, David W.; Marie-Sainte, Wenceslas; Mekarnia, Djamel; Nelson, Peter; Quinn, Samuel N.; Radford, Don J.; Rodriguez, David R.; Rowden, Pamela; Schmider, Francois-Xavier; Schwarz, Richard P.; Smith, Jeffrey C.; Stockdale, Chris; Suarez, Olga; Tan, Thiam-Guan; Triaud, Amaury H. M. J.; Waalkes, William; Wingham, Geof
通讯作者	Grieves, N (corresponding author), Univ Geneva, Observ Geneve, 51 Ch Maillettes, CH-1290 Sauverny, Switzerland.
来源期刊	ASTRONOMY & ASTROPHYSICS
ISSN	0004-6361
EISSN	1432-0746
出版年	2021
卷号	652
英文摘要	We report the discovery of five transiting companions near the hydrogen-burning mass limit in close orbits around main sequence stars originally identified by the Transiting Exoplanet Survey Satellite (TESS) as TESS objects of interest (TOIs): TOI-148, TOI-587, TOI-681, TOI-746, and TOI-1213. Using TESS and ground-based photometry as well as radial velocities from the CORALIE, CHIRON, TRES, and FEROS spectrographs, we found the companions have orbital periods between 4.8 and 27.2 days, masses between 77 and 98 M-Jup , and radii between 0.81 and 1.66 R-Jup . These targets have masses near the uncertain lower limit of hydrogen core fusion (similar to 73-96 M-Jup ), which separates brown dwarfs and low-mass stars. We constrained young ages for TOI-587 (0.2 +/- 0.1 Gyr) and TOI-681 (0.17 +/- 0.03 Gyr) and found them to have relatively larger radii compared to other transiting companions of a similar mass. Conversely we estimated older ages for TOI-148 and TOI-746 and found them to have relatively smaller companion radii. With an effective temperature of 9800 +/- 200 K, TOI-587 is the hottest known main-sequence star to host a transiting brown dwarf or very low-mass star. We found evidence of spin-orbit synchronization for TOI-148 and TOI-746 as well as tidal circularization for TOI-148. These companions add to the population of brown dwarfs and very low-mass stars with well measured parameters ideal to test formation models of these rare objects, the origin of the brown dwarf desert, and the distinction between brown dwarfs and hydrogen-burning main sequence stars.
英文关键词	brown dwarfs stars low-mass binaries: eclipsing
类型	Article
语种	英语
开放获取类型	Green Submitted, Green Published, Bronze
收录类别	SCI-E
WOS记录号	WOS:000686774100006
WOS关键词	ECLIPSING BINARY ; TIDAL EVOLUTION ; SOPHIE VELOCIMETRY ; MAGNETIC BRAKING ; ERROR-CORRECTION ; ACCURATE MASS ; GIANT PLANETS ; HOT JUPITERS ; B 2 ; KEPLER
WOS类目	Astronomy & Astrophysics
WOS研究方向	Astronomy & Astrophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362619
作者单位	[Grieves, Nolan; Bouchy, Francois; Lendl, Monika; Cointepas, Marion; Dos Santos, Leonardo A.; Nielsen, Louise D.; Psaridi, Angelica; Udry, Stephane; Segransan, Damien] Univ Geneva, Observ Geneve, 51 Ch Maillettes, CH-1290 Sauverny, Switzerland; [Carmichael, Theron] Harvard Univ, Cambridge, MA 02138 USA; [Carmichael, Theron; Collins, Karen A.; Eastman, Jason D.; Zhou, George; Charbonneau, David; Irwin, Jonathan M.; Latham, David W.; Quinn, Samuel N.] Harvard & Smithsonian, Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA; [Mireles, Ismael] Univ New Mexico, Dept Phys & Astron, 210 Yale Blvd NE, Albuquerque, NM 87106 USA; [Shporer, Avi; Goeke, Robert F.] MIT, Dept Phys, Cambridge, MA 02139 USA; [Shporer, Avi; Goeke, Robert F.] MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA; [McLeod, Kim K.] Wellesley Coll, Dept Astron, Wellesley, MA 02481 USA; [Brahm, Rafael; Jordan, Andres] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Av Diagonal Torres 2640, Santiago, Chile; [Brahm, Rafael; Jordan, Andres] ...
推荐引用方式 GB/T 7714	Grieves, Nolan,Bouchy, Francois,Lendl, Monika,et al. Populating the brown dwarf and stellar boundary: Five stars with transiting companions near the hydrogen-burning mass limit[J],2021,652.
APA	Grieves, Nolan.,Bouchy, Francois.,Lendl, Monika.,Carmichael, Theron.,Mireles, Ismael.,...&Wingham, Geof.(2021).Populating the brown dwarf and stellar boundary: Five stars with transiting companions near the hydrogen-burning mass limit.ASTRONOMY & ASTROPHYSICS,652.
MLA	Grieves, Nolan,et al."Populating the brown dwarf and stellar boundary: Five stars with transiting companions near the hydrogen-burning mass limit".ASTRONOMY & ASTROPHYSICS 652(2021).