干旱区生态环境知识资源中心(Arid): Orbital Parameters and Binary Properties of 37 FGK Stars in the Cores of Open Clusters NGC 2516 and NGC 2422

Arid

DOI	10.3847/1538-3881/ac2ccd
	Orbital Parameters and Binary Properties of 37 FGK Stars in the Cores of Open Clusters NGC 2516 and NGC 2422
	Lipartito, Isabel; Bailey, John I., III; Brandt, Timothy D.; Mazin, Benjamin A.; Mateo, Mario; Spencer, Meghin E.; Roederer, Ian U.
通讯作者	Bailey, JI (corresponding author), Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA.
来源期刊	ASTRONOMICAL JOURNAL
ISSN	0004-6256
EISSN	1538-3881
出版年	2021
卷号	162 期号:6
英文摘要	We present orbits for 24 binaries in the field of open cluster NGC 2516 (similar to 150 Myr) and 13 binaries in the field of open cluster NGC 2422 (similar to 130 Myr) using results from a multiyear radial-velocity (RV) survey of the cluster cores. Six of these systems are double-lined spectroscopic binaries. We fit these RV variable systems with orvara, a MCMC-based fitting program that models Keplerian orbits. We use precise stellar parallaxes and proper motions from Gaia EDR3 to determine cluster membership. We impose a barycentric RV prior on all cluster members; this significantly improves our orbital constraints. Two of our systems have periods between five and 15 days, the critical window in which tides efficiently damp orbital eccentricity. These binaries should be included in future analyses of circularization across similarly-aged clusters. We also find a relatively flat distribution of binary mass ratios, consistent with previous work. With the inclusion of TESS light curves for all available targets, we identity target 378-036252 as a new eclipsing binary. We also identify a field star whose secondary has a mass in the brown dwarf range, as well as two cluster members whose RVs suggest the presence of an additional companion. Our orbital fits will help constrain the binary fraction and binary properties across stellar age and across stellar environment.
类型	Article
语种	英语
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000725860600001
WOS关键词	BROWN DWARF DESERT ; WIYN OPEN CLUSTER ; RADIAL-VELOCITY ; TIDAL CIRCULARIZATION ; PLANETS ; POPULATION ; COMPANIONS ; MEMBERSHIP ; FRACTION ; ASTROPY
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/2XILL650/374038
作者单位	[Lipartito, Isabel; Bailey, John I., III; Brandt, Timothy D.; Mazin, Benjamin A.] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA; [Mateo, Mario; Spencer, Meghin E.; Roederer, Ian U.] Univ Michigan, Dept Astron, Ann Arbor, MI 40109 USA; [Roederer, Ian U.] Ctr Evolut Elements JINA CEE, Joint Inst Nucl Astrophys, E Lansing, MI USA
推荐引用方式 GB/T 7714	Lipartito, Isabel,Bailey, John I., III,Brandt, Timothy D.,et al. Orbital Parameters and Binary Properties of 37 FGK Stars in the Cores of Open Clusters NGC 2516 and NGC 2422[J],2021,162(6).
APA	Lipartito, Isabel.,Bailey, John I., III.,Brandt, Timothy D..,Mazin, Benjamin A..,Mateo, Mario.,...&Roederer, Ian U..(2021).Orbital Parameters and Binary Properties of 37 FGK Stars in the Cores of Open Clusters NGC 2516 and NGC 2422.ASTRONOMICAL JOURNAL,162(6).
MLA	Lipartito, Isabel,et al."Orbital Parameters and Binary Properties of 37 FGK Stars in the Cores of Open Clusters NGC 2516 and NGC 2422".ASTRONOMICAL JOURNAL 162.6(2021).