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WASP-41b : a transiting hot Jupiter planet orbiting a magnetically active G8V star
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Maxted, P. F. L., Anderson, D. R., Collier Cameron, A., Hellier, C., Queloz, D., Smalley, B., Street, R. A., Triaud, A. H. M. J., West, Richard G., Gillon, M., Lister, T. A., Pepe, F., Pollacco, Don, Ségransan, D., Smith, A. M. S. and Udry, S. (2011) WASP-41b : a transiting hot Jupiter planet orbiting a magnetically active G8V star. Publications of the Astronomical Society of the Pacific, Volume 123 (Number 903). pp. 547-554. doi:10.1086/660007
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Official URL: http://dx.doi.org/10.1086/660007
Abstract
We report the discovery of a transiting planet with an orbital period of 3.05 days orbiting the star TYC 7247-587-1. The star, WASP-41, is a moderately bright G8 V star (V=11.6) with a metallicity close to solar ([Fe/H]=-0.08±0.09). The star shows evidence of moderate chromospheric activity, both from emission in the cores of the Ca ii H and K ines and photometric variability with a period of 18.4 days and an amplitude of about 1%. We use a new method to show quantitatively that this periodic signal has a low false-alarm probability. The rotation period of the star implies a gyrochronological age for WASP-41 of 1.8 Gyr with an error of about 15%. We have used a combined analysis of the available photometric and spectroscopic data to derive the mass and radius of the planet (0.92±0.06 MJup, 1.20±0.06 RJup). Further observations of WASP-41 can be used to explore the connections between the properties of hot Jupiter planets and the level of chromospheric activity in their host stars.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science > Physics | ||||
| Journal or Publication Title: | Publications of the Astronomical Society of the Pacific | ||||
| Publisher: | University of Chicago Press | ||||
| ISSN: | 0004-6280 | ||||
| Official Date: | 2011 | ||||
| Dates: |
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| Volume: | Volume 123 | ||||
| Number: | Number 903 | ||||
| Page Range: | pp. 547-554 | ||||
| DOI: | 10.1086/660007 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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