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Hubble Space Telescope observations of the black hole X-ray transient GRO J0422+32 near quiescence

Hynes, R.I. and Haswell, C. A. (1999). Hubble Space Telescope observations of the black hole X-ray transient GRO J0422+32 near quiescence. Monthly Notices of the Royal Astronomical Society, 303(1) pp. 101–106.

DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1046/j.1365-8711.1999.02227.x
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Abstract

We present HST/FOS ultraviolet and optical spectroscopy of the black hole X-ray transient GRO J0422+32 shortly before the system reached quiescence. We find that the accretion spectrum from 2500 to 9000 Å can be very well fitted by a self-absorbed synchrotron model, with superposed H I and Mg II emission lines. The explanations that we suggest for this spectrum are either that it is due to active coronal regions above a geometrically thin accretion disc, or that the disc is evaporated into an advective flow.

Item Type: Journal Article
ISSN: 1365-2966
Keywords: accretion, accretion discs – binaries: close – stars: individual: GRO 0422+32 – ultraviolet: stars.
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 11139
Depositing User: Astrid Peterkin
Date Deposited: 25 Jul 2008 11:18
Last Modified: 11 Jul 2013 15:25
URI: http://oro.open.ac.uk/id/eprint/11139
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