Abstract

We present photometric and spectroscopic data on the early-type binary MP Centauri. The photometric data are analysed simultaneously with radial velocities to derive preliminary absolute dimensions for the binary components. Analysis of the spectra shows that the stars rotate synchronously and that the line of sight to the system crosses two kinematically sharp and well-separated interstellar reddening sources. It is shown that MP Cen consists of a B3 primary with M1 = 11.4 ± 0.4M⊙, R1 = 7.7 ± 0.1 R⊙ and a lobe-filling B6-B7 secondary with M2 = 4.4 ± 0.2 M⊙, R2 = 6.6 ± 0.1 R⊙.

Department(s)

Physics, Astronomy, and Materials Science

Document Type

Article

DOI

https://doi.org/10.1111/j.1365-2966.2005.09046.x

Rights Information

This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. © 2005 Royal Astronomical Society. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

Keywords

Binaries: eclipsing, Binaries: spectroscopic, Stars: early-type, Stars: evolution, Stars: individual: MP Cen

Publication Date

6-21-2005

Journal Title

Monthly Notices of the Royal Astronomical Society

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