Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1093/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
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ISSN | 0035-8711 |
EISSN | 1365-2966 |
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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