Paper: astro-ph/0601024
Date: Mon, 2 Jan 2006 11:30:14 GMT (59kb)

Title: High resolution spectroscopy of stars with transiting planets. The cases
of OGLE-TR-10, 56, 111, 113, and TrES-1

Authors: N.C Santos, F. Pont, C. Melo, G. Israelian, F. Bouchy, M. Mayor, C.
Moutou, D. Queloz, S. Udry, T. Guillot

Comments: Accepted for Publication in Astronomy & Astrophysics
\\
Context: During the past years photometric surveys, later complemented by
follow-up radial-velocity measurements, have revealed the presence of several
new extra-solar transiting planets, in very short period orbits. Many of the
host stars are extremely faint (V$\sim$16), making high-precision spectroscopic
measurements challenging. Aims: We have used the UVES spectrograph (VLT-UT2
telescope) to obtain high resolution spectra of 5 stars hosting transiting
planets, namely for OGLE-TR-10, 56, 111, 113 and TrES-1. The immediate
objective is to derive accurate stellar parameters and chemical abundances.
Methods: The stellar parameters were derived from an LTE analysis of a set of
FeI and FeII lines. Results: Complementing the spectroscopic information with
photometric transit curves and radial-velocity data from the literature, we
have then refined the stellar and planetary radii and masses. The obtained data
were also used to study and discuss the relation between the stellar
metallicity and orbital period of the planets.

\\ ( http://arXiv.org/abs/astro-ph/0601024 , 59kb)