Article (Scientific journals)
Accurate spectroscopic parameters of WASP planet host stars
Doyle, Amanda P.; Smalley, B.; Maxted, P. F. L. et al.
2013In Monthly Notices of the Royal Astronomical Society, 428 (4), p. 3164-3172
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Keywords :
Astrophysics - Solar and Stellar Astrophysics; Astrophysics - Earth and Planetary Astrophysics
Abstract :
[en] We have made a detailed spectral analysis of eleven Wide Angle Search for Planets (WASP) planet host stars using high signal-to-noise (S/N) HARPS spectra. Our line list was carefully selected from the spectra of the Sun and Procyon, and we made a critical evaluation of the atomic data. The spectral lines were measured using equivalent widths. The procedures were tested on the Sun and Procyon prior to be being used on the WASP stars. The effective temperature, surface gravity, microturbulent velocity and metallicity were determined for all the stars. We show that abundances derived from high S/N spectra are likely to be higher than those obtained from low S/N spectra, as noise can cause the equivalent width to be underestimated. We also show that there is a limit to the accuracy of stellar parameters that can be achieved, despite using high S/N spectra, and the average uncertainty in effective temperature, surface gravity, microturbulent velocity and metallicity is 83 K, 0.11 dex, 0.11 km/s and 0.10 dex respectively.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Doyle, Amanda P.
Smalley, B.
Maxted, P. F. L.
Anderson, D. R.
Collier Cameron, A.
Gillon, Michaël  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image
Hellier, C.
Pollacco, D.
Queloz, D.
Triaud, A. H. M. J.
West, R. G.
Language :
English
Title :
Accurate spectroscopic parameters of WASP planet host stars
Publication date :
01 February 2013
Journal title :
Monthly Notices of the Royal Astronomical Society
ISSN :
0035-8711
eISSN :
1365-2966
Publisher :
Blackwell Publishing, Oxford, United Kingdom
Volume :
428
Issue :
4
Pages :
3164-3172
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
9 pages, 5 figures, in MNRAS
Available on ORBi :
since 27 November 2012

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