Spectroscopic parameters for solar-type stars with moderate-to-high rotation New parameters for ten planet hosts

• Type: Article in International Scientific Journal
• Date: 2014

Authors

Tsantaki, M (Author) Other; Sousa, SG (Author) FCUP; N.C. Santos (Author) FCUP; Montalto, M (Author) Other; Delgado Mena, E (Author) FCUP; Mortier, A (Author) Other; Adibekyan, V (Author) Other; Israelian, G (Author) Other

Journal

Title: Astronomy and Astrophysics

Vol. 570

Final page: A80

ISSN: 0004-6361

Publisher: EDP Sciences

Indexing

ISI Web of Knowledge - 23 Citations

Scopus - 26 Citations

Other information

Authenticus ID: P-009-YJD

DOI: 10.1051/0004-6361/201424257

Abstract (EN): Context. Planetary studies demand precise and accurate stellar parameters as input for inferring the planetary properties. Different methods often provide different results that could lead to biases in the planetary parameters. Aims. In this work, we present a refinement of the spectral synthesis technique designed to treat fast rotating stars better. This method is used to derive precise stellar parameters, namely effective temperature, surface gravity, metallicity, and rotational velocity. The procedure is tested for FGK stars with low and moderate-to-high rotation rates. Methods. The spectroscopic analysis is based on the spectral synthesis package Spectroscopy Made Easy (SME), which assumes Kurucz model atmospheres in LTE. The line list where the synthesis is conducted is comprised of iron lines, and the atomic data are derived after solar calibration. Results. The comparison of our stellar parameters shows good agreement with literature values, both for slowly and for fast rotating stars. In addition, our results are on the same scale as the parameters derived from the iron ionization and excitation method presented in our previous works. We present new atmospheric parameters for 10 transiting planet hosts as an update to the SWEET-Cat catalog. We also re-analyze their transit light curves to derive new updated planetary properties.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 14