干旱区生态环境知识资源中心(Arid): A high binary fraction for the most massive close-in giant planets and brown dwarf desert members

Arid

DOI	10.1093/mnras/stz671
	A high binary fraction for the most massive close-in giant planets and brown dwarf desert members
	Fontanive, C.1,2; Rice, K.1,2; Bonavita, M.1,2; Lopez, E.3,4; Muzic, K.5; Biller, B.1,2
通讯作者	Fontanive, C.
来源期刊	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN	0035-8711
EISSN	1365-2966
出版年	2019
卷号	485 期号:4 页码:4967-4996
英文摘要	Stellar multiplicity is believed to influence planetary formation and evolution, although the precise nature and extent of this role remain ambiguous. We present a study aimed at testing the role of stellar multiplicity in the formation and/or evolution of the most massive, closein planetary and substellar companions. Using past and new direct imaging observations, as well as the Gaia DR2 catalogue, we searched for wide binary companions to 38 stars hosting massive giant planets or brown dwarfs (M > 7 M-Jup) on orbits shorter than similar to 1 au. We report the discovery of a new component in theWASP-14 system, and present an independent confirmation of a comoving companion to WASP-18. From a robust Bayesian statistical analysis, we derived a binary fraction of 79.0(-14.7)(+13.2) per cent between 20 and 10 000 au for our sample, twice as high as for field stars with a 3 sigma significance. This binary frequency was found to be larger than for lower-mass planets on similar orbits, and we observed a marginally higher binary rate for inner companions with periods shorter than 10 d. These results demonstrate that stellar companions greatly influence the formation and/or evolution of these systems, suggesting that the role played by binary companions becomes more important for higher-mass planets, and that this trend may be enhanced for systems with tighter orbits. Our analysis also revealed a peak in binary separation at 250 au, highlighting a shortfall of close binaries among our sample. This indicates that the mechanisms affecting planet and brown dwarf formation or evolution in binaries must operate from wide separations, although we found that the Kozai-Lidov mechanism is unlikely to be the dominant underlying process. We conclude that binarity plays a crucial role in the existence of very massive short-period giant planets and brown dwarf desert inhabitants, which are almost exclusively observed in multiple systems.
英文关键词	methods: observational methods: statistical planetary systems planets and satellites: formation binaries: visual binaries: close
类型	Article
语种	英语
国家	Scotland ; USA ; Portugal
开放获取类型	Bronze, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000474880400038
WOS关键词	EXOPLANET HOST STARS ; EXTRA-SOLAR PLANETS ; CORALIE ECHELLE SPECTROGRAPH ; LUCKY IMAGING MULTIPLICITY ; LONG-PERIOD COMPANIONS ; MULTI-ORDER TODCOR ; ALL-SKY SURVEY ; F-TYPE STARS ; STELLAR COMPANIONS ; ADAPTIVE OPTICS
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/2XILL650/217689
作者单位	1.Univ Edinburgh, Inst Astron, SUPA, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland; 2.Univ Edinburgh, Ctr Exoplanet Sci, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland; 3.NASA, Goddard Space Flight Ctr, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA; 4.NASA, Goddard Space Flight Ctr, GSFC Sellers Exoplanet Environm Collaborat, Greenbelt, MD 20771 USA; 5.Univ Lisbon, Fac Ciencias, CENTRA, Ed C8, P-1749016 Lisbon, Portugal
推荐引用方式 GB/T 7714	Fontanive, C.,Rice, K.,Bonavita, M.,et al. A high binary fraction for the most massive close-in giant planets and brown dwarf desert members[J],2019,485(4):4967-4996.
APA	Fontanive, C.,Rice, K.,Bonavita, M.,Lopez, E.,Muzic, K.,&Biller, B..(2019).A high binary fraction for the most massive close-in giant planets and brown dwarf desert members.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,485(4),4967-4996.
MLA	Fontanive, C.,et al."A high binary fraction for the most massive close-in giant planets and brown dwarf desert members".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 485.4(2019):4967-4996.