engleski

Abundances from disentangled component spectra: the eclipsing binary V578 Mon

Chemical abundances of the early-B type components of the binary V578 Mon are derived from disentangled component spectra. This is a pilote study showing that, even with moderately high line-broadening, metal abundances can be derived from disentangled spectra with a precision 0.1 dex, relative to sharp-lined single stars of the same spectral type. This binary is well-suited for such an assessment because of its youth as a member of the Rosette Nebula cluster NGC 2244, strengthening the expectation of an unevolved ZAMS chemical composition. The method is of interest to study rotationally driven mixing in main-sequence stars, with fundamental stellar parameters known with higher accuracy in (eclisping) binaries. The paper also includes an evaluation of the bias that might be present in disentangled spectra.

close binaries; stars; spectroscopy; abundances

nije evidentirano