Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.194..569p&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 194, Feb. 1981, p. 569-582. Research supported by the Science Research
Astronomy and Astrophysics
Astronomy
83
Astronomical Maps, Supernova Remnants, X Ray Imagery, X Ray Sources, X Ray Spectra, Astronomical Observatories, Brightness, Emission Spectra, Image Resolution, Proportional Counters, Space Plasmas, Three Dimensional Models
Scientific paper
An X-ray map of the SN 1006 supernova remnant acquired by the imaging proportional counter of the Einstein Observatory in the energy range 0.1-4 keV is presented. The image obtained from the imaging proportional counter shows a limb-brightened nebula, almost circular in outline with enhanced emission in two quadrants. The hardness ratio map reveals a large range of temperatures over the object, with the highest values near the limbs of the enhanced emission regions. Consideration of a three-dimensional model of the object indicates the presence of a shell of electron temperature varying between 10 to the 6th and 10 to the 7th K and density varying between 0.3 and 6/cu cm surrounding a fairly uniform interior, of electron temperature 1.5 x 10 to the 6th K and density 1.0/cu cm. The optical filaments are observed to lie parallel with the faintest edge of the X-ray shell, about 1 arcmin from the peak of X-ray emission. Mass visible in the X-ray image of 5-15 solar masses suggests that the supernova may have been of type II. No evidence is obtained for a hot stellar remnant.
Pounds Kenneth A.
Pye John P.
Rolf D. P.
Seward Frederick D.
Smith Aaron
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