Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...208....1w&link_type=abstract
Astrophysical Journal, vol. 208, Aug. 15, 1976, pt. 1, p. 1-12.
Astronomy and Astrophysics
Astronomy
31
Galactic Clusters, Oao 3, X Ray Sources, Astronomical Models, Brightness, Emission Spectra, Radio Sources (Astronomy), Spatial Distribution, X Ray Spectra
Scientific paper
The X-ray source in the Perseus cluster has been studied both by the Copernicus satellite and by sounding-rocket instruments flown by Columbia University. The spatial and spectral data from these observations are examined. A surface brightness distribution is obtained which shows that the source consists of a compact core associated with NGC 1275 and a more extended emission volume. The structure of the central core region has been examined by means of an image reconstruction technique, revealing a steeply declining luminosity function and north-south elongation. The spectrum of the emission of the core region is distinguished from that of the surrounding area and found to be consistent with a hydrogen column density of 2.5 x 10 to the 21th/sq cm. A comparison between the isothermal and adiabatic gas sphere models is presented which shows the need for at least two components to provide the X-ray emission.
Charles Phil A.
Culhane Leonard J.
Mitchell Jay R.
Wolff Richard S.
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