Einstein X-ray observations of the supernova remnant HB21

Details Einstein X-ray observations of the supernova remnant HB21 Einstein X-ray observations of the supernova remnant HB21

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.228..907l&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 228, Oct. 15, 1987, p. 907-913. NSERC-supported researc

Astronomy and Astrophysics

Astronomy

20

Astronomical Models, Supernova Remnants, X Ray Astronomy, Spectrum Analysis, Stellar Luminosity, Stellar Temperature

Scientific paper

In radio, HB21 is a large (≡2°diameter) supernova remnant. It has been observed with incomplete coverage by five Einstein IPC fields. Here is reported the first detection of X-ray emission from HB21. The 0.2 - 4 keV X-ray image of HB21 does not correlate well with radio maps. HB21 has an X-ray temperature of 7(+6, -2)×106K and a luminosity of 1.9(+7.6, -1.2)×1034erg s-1. A Sedov model applied to HB21 gives too large a temperature and shock velocity. Supernova remnant models for expansion into a 3-component ISM can fit HB21, from which an age of 8000 - 15000 yr is inferred.

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