Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pasj...45..545y&link_type=abstract
PASJ: Publications of the Astronomical Society of Japan (ISSN 0004-6264), vol. 45, no. 4, p. 545-550
Astronomy and Astrophysics
Astronomy
1
Emission Spectra, Radio Galaxies, Spectrum Analysis, Supernova Remnants, X Ray Astronomy, X Rays, Astronomical Models, Bremsstrahlung, Ginga Satellite, Intergalactic Media, Thermal Emission, X Ray Spectroscopy
Scientific paper
X-rays with energies greater than 1.5 keV near to the region of the supernova remnant HB 9 and the radio galaxy 4C 46.09 were observed with the X-ray satellite Ginga. The X-ray spectrum is represented by two-component models: a thin thermal emission at a low-energy band and a thermal emission or power-law model at a high-energy band. No significant emission line at 6.7 keV larger than 150 eV (90% upper-limit) of the equivalent width from highly ionized iron was detected. The best-fit thin thermal model has a temperature of 0.4-0.7 keV, which is attributable to the hot gas of HB 9. The hard component was found to have a temperature of 6.6 keV, or a photon index of 2.35. The NH-corrected flux in the 2-10 keV band is approximately 7 x 10-12 erg 1s/sq cm. The origin of this component has remained unsolved. Serveral possibilities, such as the AGN activity from 4C 46.09, intracluster gas and the hard tail of HB 9 are discussed.
Koyama Katsuji
Yamauchi Shigeo
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