Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....92..231d&link_type=abstract
Astronomy and Astrophysics, vol. 92, no. 3, Dec. 1980, p. 231-237.
Astronomy and Astrophysics
Astronomy
41
Interstellar Matter, Supernova Remnants, X Ray Astronomy, Luminous Intensity, Radiant Cooling, Radiative Heat Transfer
Scientific paper
The rocket soft X-ray observations of the North Polar Spur (Loop I) using a resolution of 15 arcmin in one direction and energy response down to 60 eV indicated that the X-ray ridge relative to the radio ridge shows a supernova remnant in the adiabatic phase of its evolution. The remnant age is 750,000 yr and it has exploded in a very low gas density of 0.01/cu cm. It is suggested that the explosion occurred in a local hot region of the size smaller than that proposed by Hayakawa et al. (1979); it represents an old supernova remnant which has already entered the radiative cooling phase.
Bleeker Johan A. M.
Davelaar Jacob
Deerenberg J. M. A.
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