| Issue |
A&A
Volume 383, Number 2, FebruaryIV 2002
|
|
|---|---|---|
| Page(s) | 524 - 532 | |
| Section | Interstellar and circumstellar matter | |
| DOI | https://doi.org/10.1051/0004-6361:20011758 | |
| Published online | 15 February 2002 | |
A study of accretion discs around rapidly rotating neutron stars in general relativity and its applications to four low mass X–ray binaries
Joint Astronomy Program, Indian Institute of Science, Bangalore 560012, India Indian Institute of Astrophysics, Bangalore 560034, India
Corresponding author: sudip@physics.iisc.ernet.in
Received:
9
July
2001
Accepted:
28
November
2001
We calculate the accretion disc temperature profiles, disc luminosities and boundary layer luminosities for rapidly rotating neutron stars considering the full effect of general relativity. We compare the theoretical values of these quantities with their values inferred from EXOSAT data for four low mass X–ray binary sources: XB 1820-30, GX 17+2, GX 9+1 and GX 349+2 and constrain the values of several properties of these sources. According to our calculations, the neutron stars in GX 9+1 and GX 349+2 are rapidly rotating and stiffer equations of state are unfavoured.
Key words: accretion, accretion discs / relativity / stars: neutron / stars: rotation / X–rays: binaries
© ESO, 2002
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