SIMBAD references

2005A&A...429..631F - Astronomy and Astrophysics, volume 429, 631-643 (2005/1-2)

The β Cephei variable in the eclipsing binary HD 92024. I. Determination of the orbit.

FREYHAMMER L.M., HENSBERGE H., STERKEN C., PAVLOVSKI K., SMETTE A. and ILIJIC S.

Abstract (from CDS):

object{HD 92024} is a member of the open cluster NGC 3293; it is the only eclipsing binary system with a β Cephei component known in the southern hemisphere. This paper presents the first spectroscopic analysis of the single-lined binary and provides an orbital analysis based on recent high-resolution spectroscopy and photometry. A procedure to derive orbital elements with minimal influence of the pulsational line-profile variations on the radial velocities is applied, and we find the stellar masses to be 15.0+3.0–4.0M and 3.0±0.5M respectively, and radii of 8.4±0.8R, 2.1±0.4R. The temperatures are 25500±500K and 12500±1000K. The surface gravity values of logg= 3.77±0.08 and 4.27±0.18 indicate that the binary consists of an evolved early B-type primary and a late-B main sequence companion. The resulting distance 2.8±0.3kpc and systemic velocity -16km/s confirm cluster membership. Theoretical stellar models indicate an age of 10-13Myr, somewhat higher than the literature value for the brightest members of NGC 3293.

Abstract Copyright:

Journal keyword(s): stars: binaries: eclipsing - stars: binaries: spectroscopic - stars: early-type - techniques: spectroscopic

CDS comments: Table 1: ID C1 to C3 for comparison stars is not used in SIMBAD, Tthe 3 stars have an other ID.

Simbad objects: 6

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2019.12.14-10:01:31

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