General relativistic spectra of accretion discs around rapidly rotating neutron stars: effect of light bending

Bhattacharyya, Sudip and Bhattacharya, Dipankar and Thampan, Arun V (2001) General relativistic spectra of accretion discs around rapidly rotating neutron stars: effect of light bending. In: Monthly Notices of the Royal Astronomical Society, 325 (3). pp. 989-994.

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Abstract

We present computed spectra, as seen by a distant observer, from the accretion disc around a rapidly rotating neutron star. Our calculations are carried out in a fully general relativistic framework, with an exact treatment of rotation. We take into account the Doppler shift, gravitational redshift and light-bending effects in order to compute the observed spectrum. We find that light bending significantly modifies the high-energy part of the spectrum. Computed spectra for slowly rotating neutron stars are also presented. These results would be important for modelling the observed X-ray spectra of low- mass X-ray binaries containing fast-spinning neutron stars.

Item Type:	Journal Article
Publication:	Monthly Notices of the Royal Astronomical Society
Publisher:	Blackwell Publishing
Additional Information:	The copyright of this article belongs to Blackwell Publishing.
Keywords:	accretion;accretion discs;relativity stars;neutron stars;rotation X-rays;binaries
Department/Centre:	Division of Physical & Mathematical Sciences > Joint Astronomy Programme
Date Deposited:	21 Sep 2004
Last Modified:	19 Sep 2010 04:16
URI:	http://eprints.iisc.ac.in/id/eprint/1868

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