Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ssrv...40..513d&link_type=abstract
(ESA, ESLAB Symposium on X-Ray Astronomy in the EXOSAT Era, 18th, The Hague, Netherlands, Nov. 5-9, 1984) Space Science Reviews
Astronomy and Astrophysics
Astronomy
1
Spaceborne Astronomy, Stellar Evolution, Supernova Remnants, X Ray Spectra, Emission Spectra, Exosat Satellite, Line Spectra, Spectrum Analysis, Stellar Luminosity, Stellar Spectrophotometry
Scientific paper
The Exosat medium energy observations of 3C58 and G21.5-0.9 are presented. The data for these objects is considered in conjunction with the data available from Exosat for the Crab-like SNRs Crab and Vela X. The objects have single power law spectra with a range of spectral indices of 0.6 to 1.5; 3C58 and Vela X being similar to the Crab, while G21.5-0.9 and the source associated with the Vela pulsar have significantly flatter spectra. The derived column density for G21.5-0.9 is consistent with a distance of approximately 5 kpc. The X-ray luminosities and overall electromagnetic spectra of these objects are investigated as age indicators, and compared to current model predictions.
Davelaar Jacob
Smith Aaron
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