Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-10-11
Astron.Astrophys. 397 (2003) 249-256
Astronomy and Astrophysics
Astrophysics
9 pages, 3 figures, accepted for publication in A&A
Scientific paper
10.1051/0004-6361:20021477
4U 1543-624 is a relatively bright persistent low-mass X-ray binary. Analysis of archival data from ASCA, SAX and RXTE is presented. The X-ray continuum be can modeled with the standard low-mass X-ray binary spectrum, an isothermal blackbody and a Comptonized component. Variations in the luminosity and flux ratio of the continuum components are seen. An increase in luminosity is accompanied by a decrease in the blackbody luminosity and a hardening of the spectrum. Most low-mass X-ray binaries have softer spectra and higher blackbody luminosities in high luminosity states. The Fe K-alpha line is seen only in the high luminosity spectra. A narrow feature near 0.7 keV, previously detected in the ASCA data, is also seen in the SAX data. A qualitative model of the system is presented. The X-ray observations can be explained by a low inclination system (face-on disk) containing a slowly (P >> ms) rotating neutron star. A slowly rotating neutron star would imply either that the system is a young low-mass X-ray binary, or that the accretion rate is unusually low. The empirical relation between optical and X-ray luminosity and orbital period suggests a relatively short period.
No associations
LandOfFree
X-ray properties of 4U 1543-624 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with X-ray properties of 4U 1543-624, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and X-ray properties of 4U 1543-624 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-297837