Spectral investigations of CM Draconis - new results

Details Spectral investigations of CM Draconis - new results Spectral investigations of CM Draconis - new results

Mar 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aasp....2...15k&link_type=abstract

Advances in Astronomy and Space Physics, Vol. 2, p.15-16

Physics

Space Physics

Stars: Fundamental Parameters, Binaries: Eclipsing, Spectroscopic

Scientific paper

CM Draconis is spectroscopic and eclipsing binary system that consists of two nearly identical M dwarfs. The masses and radii for the components are known with high accuracy. The period of the system is P = 1.268 day. In the course of this work we used 29 medium resolution (R=47,000) echelle spectra of CM Dra which were obtained at several different orbital phases at the 4.2-m William Herschel Telescope. We calculated synthetic spectra for a region of Na I 8185 Å, Na I 8197 Å and Rb I 7818 Å lines and fitted the spectra for all of the orbital phases. We refined the effective temperature and metallicity of the system components, using similarity function (S function) of the observed and synthetic spectra for different phases.

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