| Issue |
A&A
Volume 600, April 2017
|
|
|---|---|---|
| Article Number | A69 | |
| Number of page(s) | 12 | |
| Section | Numerical methods and codes | |
| DOI | https://doi.org/10.1051/0004-6361/201629967 | |
| Published online | 03 April 2017 | |
SWEET-Cat update and FASMA
A new minimization procedure for stellar parameters using high-quality spectra⋆,⋆⋆
1 Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, Portugal
e-mail: daniel.andreasen@astro.up.pt
2 Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Rua Campo Alegre, 4169-007 Porto, Portugal
3 Instituto de Radioastronomía y Astrofísica, IRyA, UNAM, Campus Morelia, A.P. 3-72, 58089 Michoacán, Mexico
4 Centre for Exoplanet Science, SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews KY16 9SS, UKSUPA, School of Physics and Astronomy, University of St Andrews, St Andrews KY16 9SS, UK
5 Depto. Astrofísica, Universidad de La Laguna (ULL), 38206 La Laguna, Tenerife, Spain
6 Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain
Received: 27 October 2016
Accepted: 17 January 2017
Context. Thanks to the importance that the star-planet relation has to our understanding of the planet formation process, the precise determination of stellar parameters for the ever increasing number of discovered extrasolar planets is of great relevance. Furthermore, precise stellar parameters are needed to fully characterize the planet properties. It is thus important to continue the efforts to determine, in the most uniform way possible, the parameters for stars with planets as new discoveries are announced.
Aims. In this paper we present new precise atmospheric parameters for a sample of 50 stars with planets. The results are presented in the catalogue: SWEET-Cat.
Methods. Stellar atmospheric parameters and masses for the 50 stars were derived assuming local thermodynamic equilibrium and using high-resolution and high signal-to-noise spectra. The methodology used is based on the measurement of equivalent widths with ARES2 for a list of iron lines. The line abundances were derived using MOOG. We then used the curve of growth analysis to determine the parameters. We implemented a new minimization procedure which significantly improves the computational time.
Results. The stellar parameters for the 50 stars are presented and compared with previously determined literature values. For SWEET-Cat, we compile values for the effective temperature, surface gravity, metallicity, and stellar mass for almost all the planet host stars listed in the Extrasolar Planets Encyclopaedia. This data will be updated on a continuous basis. The data can be used for statistical studies of the star-planet correlation, and for the derivation of consistent properties for known planets.
Key words: techniques: spectroscopic / stars: atmospheres / planets and satellites: fundamental parameters
Based on observations collected at the La Silla Observatory, ESO (Chile), with FEROS/2.2 m (run 2014B/020), with UVES/VLT at the Cerro Paranal Observatory (runs ID 092.C-0695, 093.C-0219, 094.C-0367, 095.C-0324, and 096.C-0092), and with FIES/NOT at Roque de los Muchachos (Spain; runs ID 14AF14 and 53-202).
The compiled SWEET-Cat is available online, https://www.astro.up.pt/resources/sweet-cat/
© ESO, 2017
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