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WASP-32b : a transiting hot jupiter planet orbiting a lithium-poor, solar-type star
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Maxted, P. F. L., Anderson, D. R., Collier Cameron, A., Gillon, M., Hellier, C., Queloz, D., Smalley, B., Triaud, A. H. M. J., West, Richard G., Enoch, R., Lister, T. A., Pepe, F., Pollacco, Don, Ségransan, D., Skillen, I. and Udry, S. (2010) WASP-32b : a transiting hot jupiter planet orbiting a lithium-poor, solar-type star. Publications of the Astronomical Society of the Pacific, Volume 122 (Number 898). pp. 1465-1470. doi:10.1086/657658
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Official URL: http://dx.doi.org/10.1086/657658
Abstract
We report the discovery of a transiting planet orbiting the star TYC 2-1155-1. The star, WASP-32, is a moderately bright ( V = 11.3 ) solar-type star ( T eff = 6100 ± 100 K , [ Fe / H ] = - 0.13 ± 0.10 ). The light curve of the star obtained with the WASP-South and WASP-North instruments shows periodic transitlike features with a depth of about 1% and a duration of 0.10 day every 2.72 days. The presence of a transitlike feature in the light curve is confirmed using z -band photometry obtained with Faulkes Telescope North. High-resolution spectroscopy obtained with the Coralie spectrograph confirms the presence of a planetary mass companion. From a combined analysis of the spectroscopic and photometric data, assuming that the star is a typical main-sequence star, we estimate that the planet has a mass M p of 3.60 ± 0.07 M Jup and a radius R p = 1.19 ± 0.06 R Jup . WASP-32 is one of a small group of hot Jupiters with masses greater than 3 M Jup . We find that some stars with hot Jupiter companions and with masses M ⋆ ≈ 1.2 M ⊙ , including WASP-32, are depleted in lithium and that the majority of these stars have lithium abundances similar to field 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: | 2010 | ||||
| Dates: |
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| Volume: | Volume 122 | ||||
| Number: | Number 898 | ||||
| Page Range: | pp. 1465-1470 | ||||
| DOI: | 10.1086/657658 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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