| Link | http://arxiv.org/abs/astro-ph/0209014 |
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| Author | Search for: Shkolnik, Evgenya; Search for: Walker, Gordon A. H.; Search for: Bohlender, David A.1 |
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| Affiliation | - National Research Council of Canada. NRC Herzberg Institute of Astrophysics
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| Format | Text, Article |
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| Abstract | We have detected modulation of the Ca II H&K reversal structure in four out of five 51 Peg-type stars whose planets have orbital periods between 3 and 4 days. We observe two effects in the K-core: (1) a broad 3-A variation at ~1% level and (2) changes on a scale of 0.5 A (~1-3%) in each of the three reversal features. The nightly variations are coherent in both H and K. From differential radial velocities measured to better than 20 m/s, up-to-date phases were extracted. The enhancements in the reversals tend to be greatest at the sub-planetary points which may imply that there is a magnetic interaction between the star's outer layers and the magnetosphere of the planet. These high-S/N (500 per pixel in the continuum) and high-resolution (R = 110,000) data are too few to confirm orbital synchronization. |
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| Publication date | 2003 |
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| In | |
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| NPARC number | 9722502 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | cc3cf6cc-c591-4dca-b17f-3635b4bcfd09 |
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| Record created | 2009-07-17 |
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| Record modified | 2020-04-02 |
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