| Lien | http://arxiv.org/abs/astro-ph/0209014 |
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| Auteur | Rechercher : Shkolnik, Evgenya; Rechercher : Walker, Gordon A. H.; Rechercher : Bohlender, David A.1 |
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| Affiliation | - Conseil national de recherches du Canada. Institut Herzberg d'astrophysique du CNRC
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| Format | Texte, Article |
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| Résumé | 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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| Date de publication | 2003 |
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| Dans | |
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| Numéro NPARC | 9722502 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | cc3cf6cc-c591-4dca-b17f-3635b4bcfd09 |
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| Enregistrement créé | 2009-07-17 |
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| Enregistrement modifié | 2020-04-02 |
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