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DOI	10.3847/1538-3881/ab245e
	New Substellar Discoveries from Kepler and K2: Is There a Brown Dwarf Desert?
	Carmichael, Theron W.1,2; Latham, David W.2; Vanderburg, Andrew M.3
通讯作者	Carmichael, Theron W.
来源期刊	ASTRONOMICAL JOURNAL
ISSN	0004-6256
EISSN	1538-3881
出版年	2019
卷号	158 期号:1
英文摘要	We present the discoveries of a brown dwarf (BD) and a low-mass star from the Kepler and K2 missions. The newly discovered BD is EPIC 212036875b and the low-mass star is KOI-607b. EPIC 212036875b has a mass of M-b = 52.3 +/- 1.9 M-J, a radius of R-b = 0.874 +/- 0.017 R-J, and orbits its host star in P = 5.169885 +/- 0.000027 days. Its host star is a late F-type star with M-* = 1.288 +/- 0.065 M-circle dot, R-( )= 1.498 +/- 0.025 R-circle dot, and T-eff = 6238 +/- 60 K. KOI-607b has a mass of M-b = 95.1 +/- 3.4 M-J, a radius of R-b = 1.089 +/- 0.089 R-J, and an orbital period of P = 5.89399148 +/- 0.00000060 days. The primary star in the KOI-607 system is a G dwarf with M- = 0.993 +/- 0.052 M-circle dot, R-* = 0.915 +/- 0.031 R-circle dot, and T-eff = 5418 +/- 87 K. We also revisit a BD, CWW 89Ab, that was previously published by Nowak et al. (under the designation EPIC 219388192b). CWW 89Ab is one of two known transiting BDs associated with a star cluster, which illustrates the need for more BDs with accurate masses, radii, and reliable age determinations to test theoretical models. We find that the newly discovered BD, EPIC 212036875b, falls in the middle of the so-called BD desert, indicating that EPIC 212036875b is either a particularly rare object, or the BD desert may not be so dry after all.
英文关键词	brown dwarfs techniques: photometric techniques: radial velocities techniques: spectroscopic
类型	Article
语种	英语
国家	USA
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000476861500004
WOS关键词	RADIUS ANOMALIES ; ECLIPSING BINARY ; PLANETS ; INHABITANT ; EXOPLANETS
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/2XILL650/214426
作者单位	1.Harvard Univ, Cambridge, MA 02138 USA; 2.Ctr Astrophysics Harvard & Smithsonian, 60 Garden St, Cambridge, MA 02138 USA; 3.Univ Texas Austin, Austin, TX 78712 USA
推荐引用方式 GB/T 7714	Carmichael, Theron W.,Latham, David W.,Vanderburg, Andrew M.. New Substellar Discoveries from Kepler and K2: Is There a Brown Dwarf Desert?[J],2019,158(1).
APA	Carmichael, Theron W.,Latham, David W.,&Vanderburg, Andrew M..(2019).New Substellar Discoveries from Kepler and K2: Is There a Brown Dwarf Desert?.ASTRONOMICAL JOURNAL,158(1).
MLA	Carmichael, Theron W.,et al."New Substellar Discoveries from Kepler and K2: Is There a Brown Dwarf Desert?".ASTRONOMICAL JOURNAL 158.1(2019).