干旱区生态环境知识资源中心(Arid): NGTS-19b: a high-mass transiting brown dwarf in a 17-d eccentric orbit

Arid

DOI	10.1093/mnras/stab1459
	NGTS-19b: a high-mass transiting brown dwarf in a 17-d eccentric orbit
	Acton, Jack S.; Goad, Michael R.; Burleigh, Matthew R.; Casewell, Sarah L.; Breytenbach, Hannes; Nielsen, Louise D.; Smith, Gareth; Anderson, David R.; Battley, Matthew P.; Bayliss, Daniel; Bouchy, Francois; Bryant, Edward M.; Csizmadia, Szilard; Eigmueller, Philipp; Gill, Samuel; Gillen, Edward; Grieves, Nolan; Gunther, Maximilian N.; Henderson, Beth A.; Hodgkin, Simon T.; Jackman, James A. G.; Jenkins, James S.; Lendl, Monika; McCormac, James; Moyano, Maximiliano; Nelson, Richard P.; Sefako, Ramotholo R.; Smith, Alexis M. S.; Stalport, Manu; Thomas, Jessymol K.; Tilbrook, Rosanna H.; Udry, Stephane; West, Richard G.; Wheatley, Peter J.; Worters, Hannah L.; Vines, Jose, I; Alves, Douglas R.
通讯作者	Acton, JS (corresponding author), Univ Leicester, Sch Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England.
来源期刊	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN	0035-8711
EISSN	1365-2966
出版年	2021
卷号	505 期号:2 页码:2741-2752
英文摘要	We present the discovery of NGTS-19b, a high-mass transiting brown dwarf discovered by the Next Generation Transit Survey. We investigate the system using follow-up photometry from the South African Astronomical Observatory, as well as sector 11 Transiting Exoplanet Survey Satellite data, in combination with radial velocity measurements from the CORALIE spectrograph to precisely characterize the system. We find that NGTS-19b is a brown dwarf companion to a K-star, with a mass of M-Jup and radius of R-Jup. The system has a reasonably long period of 17.84 d, and a high degree of eccentricity of . The mass and radius of the brown dwarf imply an age of Gyr, however, this is inconsistent with the age determined from the host star spectral energy distribution, suggesting that the brown dwarf may be inflated. This is unusual given that its large mass and relatively low levels of irradiation would make it much harder to inflate. NGTS-19b adds to the small, but growing number of brown dwarfs transiting main-sequence stars, and is a valuable addition as we begin to populate the so-called brown dwarf desert.
英文关键词	techniques: photometric techniques: radial velocities brown dwarfs
类型	Article
语种	英语
开放获取类型	hybrid, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000672803400088
WOS关键词	EVOLUTIONARY MODELS ; TIDAL EVOLUTION ; CORALIE SURVEY ; ULTRA-COOL ; T DWARFS ; PLANETS ; STAR ; DISCOVERY ; PERIOD ; CIRCULARIZATION
WOS类目	Astronomy & Astrophysics
WOS研究方向	Astronomy & Astrophysics
来源机构	Arizona State University ; University of London
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364198
作者单位	[Acton, Jack S.; Goad, Michael R.; Burleigh, Matthew R.; Casewell, Sarah L.; Henderson, Beth A.; Tilbrook, Rosanna H.] Univ Leicester, Sch Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England; [Breytenbach, Hannes; Sefako, Ramotholo R.; Thomas, Jessymol K.; Worters, Hannah L.] South African Astron Observ, POB 9,Observ 7935, Cape Town, South Africa; [Breytenbach, Hannes] Univ Cape Town, Dept Astron, ZA-7700 Rondebosch, South Africa; [Nielsen, Louise D.; Bouchy, Francois; Grieves, Nolan; Lendl, Monika; Stalport, Manu; Udry, Stephane] Univ Geneva, Observ Geneve, 51 Ch Maillettes, CH-1290 Sauverny, Switzerland; [Smith, Gareth; Gillen, Edward] Cavendish Lab, Astrophys Grp, JJ Thomson Ave, Cambridge CB3 0HE, England; [Anderson, David R.; Battley, Matthew P.; Bayliss, Daniel; Bryant, Edward M.; Gill, Samuel; Jackman, James A. G.; McCormac, James; West, Richard G.; Wheatley, Peter J.] Univ Warwick, Ctr Exoplanets & Habitabil, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands, England; [Anderson, David R.; Battley...
推荐引用方式 GB/T 7714	Acton, Jack S.,Goad, Michael R.,Burleigh, Matthew R.,et al. NGTS-19b: a high-mass transiting brown dwarf in a 17-d eccentric orbit[J]. Arizona State University, University of London,2021,505(2):2741-2752.
APA	Acton, Jack S..,Goad, Michael R..,Burleigh, Matthew R..,Casewell, Sarah L..,Breytenbach, Hannes.,...&Alves, Douglas R..(2021).NGTS-19b: a high-mass transiting brown dwarf in a 17-d eccentric orbit.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,505(2),2741-2752.
MLA	Acton, Jack S.,et al."NGTS-19b: a high-mass transiting brown dwarf in a 17-d eccentric orbit".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 505.2(2021):2741-2752.