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27 April 2024 |
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Optical Follow-up of New SMC Wing Be/X-ray Binaries | | M.P.E. Schurch
; M.J. Coe
; K.E. McGowan
; V.A. McBride
; D.A. Buckley
; J.L. Galache
; R.H.D. Corbet
; | | Date: |
2 Aug 2007 | | Abstract: | We investigate the optical counterparts of recently discovered Be/X-ray
binaries in the Small Magellanic Cloud. In total four sources, SXP101, SXP700,
SXP348 and SXP65.8 were detected during the Chandra Survey of the Wing of the
SMC. SXP700 and SXP65.8 were previously unknown. Many optical ground based
telescopes have been utilised in the optical follow-up, providing coverage in
both the red and blue bands. This has led to the classification of all of the
counterparts as Be stars and confirms that three lie within the Galactic
spectral distribution of known Be/X-ray binaries. SXP101 lies outside this
distribution becoming the latest spectral type known. Monitoring of the Halpha
emission line suggests that all the sources bar SXP700 have highly variable
circumstellar disks, possibly a result of their comparatively short orbital
periods. Phase resolved X-ray spectroscopy has also been performed on SXP65.8,
revealing that the emission is indeed harder during the passage of the X-ray
beam through the line of sight. | | Source: | arXiv, 0708.0228 | | Services: | Forum | Review | PDF | Favorites | |
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