Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pasj...45..567h&link_type=abstract
PASJ: Publications of the Astronomical Society of Japan (ISSN 0004-6264), vol. 45, no. 4, p. 567-572
Astronomy and Astrophysics
Astronomy
6
Accretion Disks, Neutron Stars, Spectral Correlation, X Ray Astronomy, X Ray Binaries, X Ray Spectra, Astronomical Models, Black Body Radiation, Color-Color Diagram, Ginga Satellite
Scientific paper
GX 17+2, a bright low-mass X-ray binary, was observed with the X-ray satellite Ginga in 1989. Remarkable correlation curves of this source in both the X-ray color-color and color-intensity diagrams determine the physical parameters in model spectra comprising a hard blackbody component and a multicolor disk component. Fittings of the model spectra with observations in the color-color and color-intensity diagrams reveal that the effective temperatures and the innermost radius of the accretion disk remain stable, whereas the emission area and the effective temperature of the hard blackbody component, presumably emitted from the neutron-star surface, are variable.
Asaoka Ikuko
Hōshi Reiun
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