Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...230..103b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 230, no. 1, April 1990, p. 103-119. Research supported by the Della Riccia Fou
Astronomy and Astrophysics
Astronomy
100
Pulsars, Stellar Spectra, Variable Stars, X Ray Binaries, Black Holes (Astronomy), Color-Color Diagram, Power Spectra
Scientific paper
From Exosat archive data of 14 X-ray binaries (12 high mass X-ray binaries and 2 low mass X-ray binaries), broad band power spectra and color-color diagrams are produced. The aperiodic (noise) variability of the sources is studied. All the X-ray pulsars present in the sample show strong noise components in the emission, with a fractional variability between 20 and 30 percent. The shape of these noise components is quite complex and cannot be fitted to a simple analytical law as in the case of low mass sources. The black hole candidate Cyg X-1 is the only nonpulsing source in the sample showing a high rms (35 percent) noise. The shape of the power spectrum of Cyg X-1 appears to be more complex than a simple shot noise model. Some of the sources are also observed in a low noise state (rms about 10-15 percent). The correlations between these variations and other characteristics of the sources are analyzed. The possible connections between these properties and those observed in LMXB are discussed.
Belloni Tomaso
Hasinger Guenter
No associations
LandOfFree
An atlas of aperiodic variability in HMXB 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 An atlas of aperiodic variability in HMXB, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An atlas of aperiodic variability in HMXB will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1379260