GINGA observation of SS Cygni

Details GINGA observation of SS Cygni GINGA observation of SS Cygni

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pasj...44..537y&link_type=abstract

PASJ: Publications of the Astronomical Society of Japan (ISSN 0004-6264), vol. 44, no. 5, p. 537-542.

Astronomy and Astrophysics

Astronomy

18

Ginga Satellite, High Temperature Plasmas, Light Curve, Satellite Observation, White Dwarf Stars, X Ray Binaries, Accretion Disks, Bremsstrahlung

Scientific paper

Results are presented of the Ginga X-ray observations of a U Gem-type dwarf nova, SS Cygni, which were made at the time when there were no outbursts. The X-ray luminosity of SS Cygni was estimated to be 1.5 x 10 exp 32 erg/s in the 1-37 keV band. The observed energy spectrum is well reproduced by a thermal bremsstrahlung spectrum including an iron emission line. However, the line center energy of SS Cygni, 6.68 +/- 0.12 keV, is inconsistent with the plasma temperature of about 17.7 keV. Possible explanations for this inconsistency are examined, and a two-temperature model for the hot plasma is proposed.

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