Arid
DOI10.1093/mnras/sts709
Finding exoplanets orbiting young active stars - I. Technique
Moulds, V. E.1; Watson, C. A.1; Bonfils, X.2; Littlefair, S. P.3; Simpson, E. K.1
通讯作者Moulds, V. E.
来源期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
EISSN1365-2966
出版年2013
卷号430期号:3页码:1709-1721
英文摘要

Stellar activity, such as starspots, can induce radial velocity (RV) variations that can mask or even mimic the RV signature of orbiting exoplanets. For this reason RV exoplanet surveys have been unsuccessful when searching for planets around young, active stars and are therefore failing to explore an important regime which can help to reveal how planets form and migrate. This paper describes a new technique to remove spot signatures from the stellar line-profiles of moderately rotating, active stars (v sin i ranging from 10 to 50 km s(-1)). By doing so it allows planetary RV signals to be uncovered. We used simulated models of a G5V type star with differing dark spots on its surface along with archive data of the known active star HD 49933 to validate our method. The results showed that starspots could be effectively cleaned from the line-profiles so that the stellar RV jitter was reduced by more than 80 per cent. Applying this procedure to the same models and HD 49933 data, but with fake planets injected, enabled the effective removal of starspots so that Jupiter mass planets on short orbital periods were successfully recovered. These results show that this approach can be useful in the search for hot-Jupiter planets that orbit around young, active stars with a v sin i of similar to 10-50 km s(-1).


英文关键词line: profiles methods: data analysis planets and satellites: detection planets and satellites: general stars: activity starspots
类型Article
语种英语
国家North Ireland ; France ; England
收录类别SCI-E
WOS记录号WOS:000319260500015
WOS关键词BROWN DWARF DESERT ; STELLAR ACTIVITY ; MASSIVE PLANET ; HOT-JUPITER ; COOL STARS ; BD+20 1790 ; SUN ; SPOTS ; VARIABILITY ; PARAMETERS
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/2XILL650/178946
作者单位1.Queens Univ Belfast, Dept Phys & Astron, Belfast BT7 1NN, Antrim, North Ireland;
2.Univ Grenoble 1, CNRS, UMR 5274, INSU,IPAG, F-38041 Grenoble, France;
3.Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England
推荐引用方式
GB/T 7714
Moulds, V. E.,Watson, C. A.,Bonfils, X.,et al. Finding exoplanets orbiting young active stars - I. Technique[J],2013,430(3):1709-1721.
APA Moulds, V. E.,Watson, C. A.,Bonfils, X.,Littlefair, S. P.,&Simpson, E. K..(2013).Finding exoplanets orbiting young active stars - I. Technique.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,430(3),1709-1721.
MLA Moulds, V. E.,et al."Finding exoplanets orbiting young active stars - I. Technique".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 430.3(2013):1709-1721.
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