2005A&A...429..631F


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.08CET02:43:17

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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Number of rows : 6

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 HD 91477 * 10 32 21.0814334068 -58 32 45.054696776   7.24 7.35     B5III 23 0
2 NGC 3293 OpC 10 35 49 -58 13.8   4.84 4.7     ~ 285 0
3 CPD-57 3523 * 10 35 57.7158544924 -58 13 20.813210350 7.19 8.05 8.03 7.92 7.85 B1III 39 0
4 HD 92024 Pu* 10 36 08.3334290886 -58 13 04.351273002 8.11 8.90 9.00 9.63 8.94 B1III 61 0
5 HD 92072 * 10 36 32.7815245890 -59 11 25.199110896   6.92 7.04     B6(IV) 25 0
6 * sig Sco bC* 16 21 11.3157134 -25 35 34.051476 2.32 3.02 2.89 1.69 1.58 O9.5(V)+B7(V) 832 0

    Equat.    Gal    SGal    Ecl

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2021.03.08-02:43:17

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