The population of massive x-ray binaries
The population of massive x-ray binaries
We present high resolution blue spectroscopy of an almost complete sample of optical counterparts to massive X-ray binaries in the Large Magellanic Cloud (LMC) and derive their spectral classification. We find an spectral type B0II for the optical counterpart to, confirming it as the first wind-fed massive X-ray binary in the LMC. We also confirm the Be nature of the proposed counterpart to RX J0535.0-6700. The proposed optical counterpart to RX J0531.5-6518 is a B2V star with signs of emission in the Balmer lines. In total, we give accurate spectral types for 14 counterparts. We find that the overall observed population of massive X-ray binaries in the LMC has a distribution not very different from the observed Galactic population and we discuss different selection effects affecting our knowledge of this population. The spectral distribution of the binary population is also rather similar to the Galactic one. This distribution implies that Be/X-ray binaries must have preferentially formed from moderately massive binaries undergoing semi-conservative evolution. The observation of several Be/X-ray binaries with large eccentricities implies then the existence of supernova kicks.
stars: binaries: close - X-rays: binaries - stars: early-type - stars: emission line, Be - galaxies: Magellanic Clouds
517-532
Negueruela, I.
9d1fc407-8ec5-43db-a49f-ce5b2c05e9b7
Coe, M.J.
04dfb23b-1456-46a3-9242-5cee983471d5
April 2002
Negueruela, I.
9d1fc407-8ec5-43db-a49f-ce5b2c05e9b7
Coe, M.J.
04dfb23b-1456-46a3-9242-5cee983471d5
Negueruela, I. and Coe, M.J.
(2002)
The population of massive x-ray binaries.
Astronomy & Astrophysics, 385 (2002), .
(doi:10.1051/0004-6361:20020139).
Abstract
We present high resolution blue spectroscopy of an almost complete sample of optical counterparts to massive X-ray binaries in the Large Magellanic Cloud (LMC) and derive their spectral classification. We find an spectral type B0II for the optical counterpart to, confirming it as the first wind-fed massive X-ray binary in the LMC. We also confirm the Be nature of the proposed counterpart to RX J0535.0-6700. The proposed optical counterpart to RX J0531.5-6518 is a B2V star with signs of emission in the Balmer lines. In total, we give accurate spectral types for 14 counterparts. We find that the overall observed population of massive X-ray binaries in the LMC has a distribution not very different from the observed Galactic population and we discuss different selection effects affecting our knowledge of this population. The spectral distribution of the binary population is also rather similar to the Galactic one. This distribution implies that Be/X-ray binaries must have preferentially formed from moderately massive binaries undergoing semi-conservative evolution. The observation of several Be/X-ray binaries with large eccentricities implies then the existence of supernova kicks.
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Submitted date: 19 November 2001
Published date: April 2002
Keywords:
stars: binaries: close - X-rays: binaries - stars: early-type - stars: emission line, Be - galaxies: Magellanic Clouds
Identifiers
Local EPrints ID: 44835
URI: http://eprints.soton.ac.uk/id/eprint/44835
ISSN: 0004-6361
PURE UUID: 49a6c073-23d3-461e-8a93-c186792809bf
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Date deposited: 16 Mar 2007
Last modified: 16 Mar 2024 02:35
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Author:
I. Negueruela
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