Detection of X-ray emission from the remnant of the supernova 1006 A.D.
Abstract
Results are reported for OSO-7 observations which positively identify the supernova remnant SN 1006 as a weak source of X-ray emission. Acceptable fits to the spectrum are obtained for both a power law with an energy index of about -2.3 and for thermal bremsstrahlung at a temperature corresponding to about 4 keV. The X-ray intensity over the range from 1 to 10 keV is found to be about 9 by 10 to the -11th power erg/sq cm per sec, and it is assumed that the X-rays originate in a plasma shell 4.4 pc in radius and heated by an expanding blast wave. The distance of SN 1006 is estimated as 1.2 kpc, its X-ray luminosity (1-10 keV) as about 1.6 by 10 to the 34th power erg/sec, and its initial kinetic energy as of the order of 10 to the 50th power ergs. It is noted that the reverse-shock model of X-ray production is also consistent with the data and that SN 1006 is the only supernova remnant for which both X-ray and radio emission have been detected, but no optical filaments have been observed.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- March 1976
- DOI:
- 10.1086/182066
- Bibcode:
- 1976ApJ...204L.111W
- Keywords:
-
- Nebulae;
- Satellite Observation;
- Supernova Remnants;
- X Ray Sources;
- Emission Spectra;
- Luminous Intensity;
- Oso-7;
- Radio Emission;
- Spaceborne Astronomy;
- X Ray Spectra;
- Astrophysics