Einstein IPC imaging and spectral observations of the supernova remnant HB 9

Details Einstein IPC imaging and spectral observations of the supernova remnant HB 9 Einstein IPC imaging and spectral observations of the supernova remnant HB 9

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...322..917l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 322, Nov. 15, 1987, p. 917-921. NSERC-supported research.

Astronomy and Astrophysics

Astronomy

9

Heao 3, Image Analysis, Proportional Counters, Spaceborne Astronomy, Spectrum Analysis, Supernova Remnants, Radio Spectra, Satellite-Borne Instruments, X Ray Sources

Scientific paper

In radio wavelengths, HB 9 is a large supernova remnant. The central area of HB 9 has been observed with fairly complete coverage by four Einstein IPC fields. A soft X-ray image and results from analysis of X-ray spectra from the IPC observations are presented. HB 9 has spatial variations in X-ray temperature from 0.4 to 1.2 keV, with the temperature decreasing from center to edge. For a distance of 1.1 kpc, the 0.2-4 keV luminosity is 5 x 10 to the 34th ergs/s. A Sedov supernova remnant model does not fit HB 9's properties. Supernova remnant models for expansion into a three-component ISM give a satisfactory fit and yield an age of 14,000 yr.

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