干旱区生态环境知识资源中心(Arid): On the origin of wide-orbit ALMA planets: giant protoplanets disrupted by their cores

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DOI	10.1093/mnras/stz2497
	On the origin of wide-orbit ALMA planets: giant protoplanets disrupted by their cores
	Humphries, J.; Nayakshin, S.
通讯作者	Humphries, J.
来源期刊	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN	0035-8711
EISSN	1365-2966
出版年	2019
卷号	489 期号:4 页码:5187-5201
英文摘要	Recent ALMA observations may indicate a surprising abundance of sub-Jovian planets on very wide orbits in protoplanetary discs that are only a few million years old. These planets are too young and distant to have been formed via the core accretion (CA) scenario, and are much less massive than the gas clumps born in the classical gravitational instability (GI) theory. It was recently suggested that such planets may form by the partial destruction of GI protoplanets: energy output due to the growth of a massive core may unbind all or most of the surrounding pre-collapse protoplanet. Here we present the first 3D global disc simulations that simultaneously resolve grain dynamics in the disc and within the protoplanet. We confirm that massive GI protoplanets may self-destruct at arbitrarily large separations from the host star provided that solid cores of mass similar to 10-20 M-circle dot. are able to grow inside them during their pre-collapse phase. In addition, we find that the heating force recently analysed by Masset & VelascoRomero (2017) perturbs these cores away from the centre of their gaseous protoplanets. This leads to very complicated dust dynamics in the protoplanet centre, potentially resulting in the formation of multiple cores, planetary satellites, and other debris such as planetesimals within the same protoplanet. A unique prediction of this planet formation scenario is the presence of sub-Jovian planets at wide orbits in Class 0/I protoplanetary discs.
英文关键词	planets and satellites: composition planets and satellites: formation planet-disc interactions protoplanetary discs brown dwarfs
类型	Article
语种	英语
国家	England
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000489302400058
WOS关键词	GRAVITATIONAL-INSTABILITY ; GRAIN SEDIMENTATION ; ACCRETION ; FEEDBACK ; MODEL ; FRAGMENTATION ; METALLICITY ; EVOLUTION ; ROTATION ; DESERT
WOS类目	Astronomy & Astrophysics
WOS研究方向	Astronomy & Astrophysics
EI主题词	2019-11-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310409
作者单位	Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England
推荐引用方式 GB/T 7714	Humphries, J.,Nayakshin, S.. On the origin of wide-orbit ALMA planets: giant protoplanets disrupted by their cores[J],2019,489(4):5187-5201.
APA	Humphries, J.,&Nayakshin, S..(2019).On the origin of wide-orbit ALMA planets: giant protoplanets disrupted by their cores.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,489(4),5187-5201.
MLA	Humphries, J.,et al."On the origin of wide-orbit ALMA planets: giant protoplanets disrupted by their cores".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 489.4(2019):5187-5201.