Issue |
EAS Publications Series
Volume 64, 2013
Setting a New Standard in the Analysis of Binary Stars
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Page(s) | 253 - 256 | |
Section | Advances in Spectroscopic Methods | |
DOI | https://doi.org/10.1051/eas/1364035 | |
Published online | 25 February 2014 |
K. Pavlovski, A. Tkachenko and G. Torres (eds)
EAS Publications Series, 64 (2013) 253–256
Chemical abundances on the secondary star in the low-mass x-ray binary Cygnus X-2
1 Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain
2 Depto. Astrofísica, Universidad de La Laguna (ULL), 38206 La Laguna, Tenerife, Spain
3 Consejo Superior de Investigaciones Científicas, Spain
We present our first results in the analysis of the secondary star in the Low-Mass X-Ray binary (LMXB) Cygnus X-2, using a high resolution spectrum obtained with UES@WHT in ORM (La Palma, Tenerife). We have used a χ2 minimization procedure to create a grid of 1 500 000 LTE synthetic spectra that allow us to obtain a plausible range of values of the stellar parameters, taking into account any possible veiling from the accretion disk produced by the presence of a neutron star as the primary. We will study the chemical abundances of several elements and study their anomalies regarding Galactic trends.
© EAS, EDP Sciences, 2014