干旱区生态环境知识资源中心(Arid): Dispersed Matter Planet Project discoveries of ablating planets orbiting nearby bright stars

Arid

DOI	10.1038/s41550-019-0973-y
	Dispersed Matter Planet Project discoveries of ablating planets orbiting nearby bright stars
	Haswell, Carole A.1; Staab, Daniel 1,2; Barnes, John R.1; Anglada-Escude, Guillem 3; Fossati, Luca 1,4; Jenkins, James S.5; Norton, Andrew J.1; Doherty, James P. J.1; Cooper, Joseph 1
通讯作者	Haswell, Carole A.
来源期刊	NATURE ASTRONOMY
ISSN	2397-3366
出版年	2020
卷号	4 期号:4 页码:408-418
英文摘要	Some highly irradiated close-in exoplanets orbit stars showing anomalously low stellar chromospheric emission. We attribute this deficit to absorption by circumstellar gas replenished by mass loss from ablating planets. Here we report statistics validating this hypothesis. Among similar to 3,000 nearby, bright, main-sequence stars, similar to 40 show depressed chromospheric emission indicative of undiscovered mass-losing planets. The Dispersed Matter Planet Project uses high-precision, high-cadence radial velocity (RV) measurements to detect these planets. We summarize results for two planetary systems (DMPP-1 and DMPP-3) and fully present observations revealing an M-p sin i = 0.469 M-J planet in a 5.207 d orbit around the gamma Doradus pulsator HD 11231 (DMPP-2). We have detected short-period planets wherever we have made more than 60 RV measurements, demonstrating that we have originated a very efficient method for detecting nearby compact planetary systems. These shrouded, ablating planetary systems may be a short-lived phase related to the Neptunian desert, that is, the dearth of intermediate-mass planets at short orbital periods. The circumstellar gas facilitates compositional analysis, allowing empirical exogeology in the cases of sublimating rocky planets. Dispersed Matter Planet Project discoveries will be important for establishing the empirical mass-radius-composition relationship(s) for low-mass planets.
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:000508042900001
WOS关键词	GAMMA-DORADUS ; MODE-IDENTIFICATION ; EXTRASOLAR PLANETS ; DELTA-SCUTI ; PERIOD ; CANDIDATE ; FREQUENCY ; DWARFS
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/2XILL650/311916
作者单位	1.Open Univ, Sch Phys Sci, Milton Keynes, Bucks, England; 2.Rutherford Appleton Lab, AVS, Harwell, Berks, 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, Santiago, Chile
推荐引用方式 GB/T 7714	Haswell, Carole A.,Staab, Daniel,Barnes, John R.,et al. Dispersed Matter Planet Project discoveries of ablating planets orbiting nearby bright stars[J]. University of London,2020,4(4):408-418.
APA	Haswell, Carole A..,Staab, Daniel.,Barnes, John R..,Anglada-Escude, Guillem.,Fossati, Luca.,...&Cooper, Joseph.(2020).Dispersed Matter Planet Project discoveries of ablating planets orbiting nearby bright stars.NATURE ASTRONOMY,4(4),408-418.
MLA	Haswell, Carole A.,et al."Dispersed Matter Planet Project discoveries of ablating planets orbiting nearby bright stars".NATURE ASTRONOMY 4.4(2020):408-418.