干旱区生态环境知识资源中心(Arid): A compact multi-planet system around a bright nearby star from the Dispersed Matter Planet Project

Arid

DOI	10.1038/s41550-019-0974-x
	A compact multi-planet system around a bright nearby star from the Dispersed Matter Planet Project
	Staab, D.1,2; Haswell, C. A.1; Barnes, J. R.1; Anglada-Escude, G.3; Fossati, L.4; Doherty, J. P. J.1; Cooper, J.1; Jenkins, J. S.5; Diaz, M. R.5; Soto, M. G.3,5
通讯作者	Haswell, C. A.
来源期刊	NATURE ASTRONOMY
ISSN	2397-3366
出版年	2020
卷号	4 期号:4 页码:399-407
英文摘要	Star DMPP-1 hosts a compact, four-planet system comprising three irradiated super-Earth-mass planets and one Neptune-mass planet, discovered through radial velocity measurements and the star's anomalously low chromospheric emission. To put the Solar System's terrestrial planets in context, the detection and characterization of low-mass exoplanets is important but challenging. The Dispersed Matter Planet Project targets stars with anomalously low Ca ii H and K chromospheric emission, indicative of circumstellar absorbing gas. Here we report high-precision, high-cadence radial-velocity measurements of the F8V star DMPP-1 (HD 38677). These were motivated by depressed Ca ii H and K line cores indicative of short-period, ablating planets producing circumstellar gas. We find a compact planetary system with orbital periods of about 2.9-19 days, comprising three super-Earth-mass planets (about 3-10 M-circle plus) and one Neptune-mass planet (about 24 M-circle plus). The irradiated super-Earths may be remnant cores of giant planets after mass loss while crossing the Neptune desert. A priori inferences about the presence of short-period planets enabled the efficient discovery of the DMPP-1 planets. We anticipate informative follow-up characterization studies.
类型	Article
语种	英语
国家	England ; Austria ; Chile
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000508042900002
WOS关键词	EXTRASOLAR PLANET ; SEARCH
WOS类目	Astronomy & Astrophysics
WOS研究方向	Astronomy & Astrophysics
EI主题词	2019-12-23
来源机构	University of London
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/311914
作者单位	1.Open Univ, Sch Phys Sci, Walton Hall, Milton Keynes, Bucks, England; 2.Rutherford Appleton Lab, AVS, Oxford, England; 3.Queen Mary Univ London, Sch Phys & Astron, London, England; 4.Austrian Acad Sci, Space Res Inst, Graz, Austria; 5.Univ Chile, Dept Astron, Camino Observatorio, Santiago, Chile
推荐引用方式 GB/T 7714	Staab, D.,Haswell, C. A.,Barnes, J. R.,et al. A compact multi-planet system around a bright nearby star from the Dispersed Matter Planet Project[J]. University of London,2020,4(4):399-407.
APA	Staab, D..,Haswell, C. A..,Barnes, J. R..,Anglada-Escude, G..,Fossati, L..,...&Soto, M. G..(2020).A compact multi-planet system around a bright nearby star from the Dispersed Matter Planet Project.NATURE ASTRONOMY,4(4),399-407.
MLA	Staab, D.,et al."A compact multi-planet system around a bright nearby star from the Dispersed Matter Planet Project".NATURE ASTRONOMY 4.4(2020):399-407.