Spectral study of GX 339-4 in the low-intensity state observed with GINGA

Details Spectral study of GX 339-4 in the low-intensity state observed with GINGA Spectral study of GX 339-4 in the low-intensity state observed with GINGA

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994pasj...46..107u&link_type=abstract

PASJ: Publications of the Astronomical Society of Japan (ISSN 0004-6264), vol. 46, no. 1, p. 107-115

Astronomy and Astrophysics

Astronomy

52

Astronomical Models, Black Holes (Astronomy), Energy Spectra, Iron, Spectral Line Width, X Ray Astronomy, X Ray Binaries, X Ray Spectra, Compton Effect, Counters, Fluorescence, Ginga Satellite, Ionization, K Lines, Reflection

Scientific paper

The energy spectra of the black-hole candidate GX 339-4 in the low-intensity state were observed on four occasions through 1989 to 1991 with the Large Area Counter on board the Ginga satellite. The spectra showed significant deviations from a power-law, with an iron Kalpha emission line at approximetaly 6.4 keV and a broad iron K-edge structure above approximately 7 keV. The enrgy spectra above approximately 4 keV were successfully explained with a reflection model, in which part of the incident X-rays with a power-law spectrum is Compton reflected by optically thick matter, resulting in a harder continuum component with iron K-edge absorption and an iron flourescent line. The line equivalent width with respect to the reflection component decreases as the source flux increases. This is consistent with an increase in the ionization state of the material, so that resonant absorption followed by Auger ionization depletes the line. The photon-index of the power-law component was clearly variable, and it correlated with the relative amount of the reflection component. Such a correlation may be explained in the context of the anisotropic Comptonization models of Haardt et al. (1993), or by a variation of the relative geometry of the source and disk.

Affiliated with

Also associated with

No associations

Rating

Spectral study of GX 339-4 in the low-intensity state observed with GINGA 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 Spectral study of GX 339-4 in the low-intensity state observed with GINGA, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectral study of GX 339-4 in the low-intensity state observed with GINGA will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1018820