The distribution and morphology of X-ray emitting gas in the core of the Perseus cluster.
Abstract
An unresolved source has been found coincident with the nucleus of NGC 1275 in a high-resolution X-ray image of the core of the Perseus cluster. Absorption in the optical features at high velocity with respect to NGC 1275, which are thought to be associated with a foreground galaxy, does not produce any detectable X-ray absorption. The emission tends to become asymmetric in the presence of the lower-velocity filaments, but no obvious, detailed correlation is found between X-ray enhancements and individual filaments. Deprojection of surface brightness to yield temperature and density profiles of the intracluster gas shows results consistent with a quasi-hydrostatic radiative accretion flow onto NGC 1275, and the pressure-driven mass inflow onto the central galaxy is then 200-400 solar masses/yr. The possibility of a problem in the relation of line-of-sight velocity dispersion to cluster gravitational mass is confirmed.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 1981
- DOI:
- 10.1086/159128
- Bibcode:
- 1981ApJ...248...47F
- Keywords:
-
- Galactic Clusters;
- Galactic Structure;
- Intergalactic Media;
- Interstellar Gas;
- Mass Distribution;
- X Ray Sources;
- Brightness Distribution;
- Gas Density;
- Gas Temperature;
- Heao 2;
- Spatial Distribution;
- Temperature Profiles;
- Astrophysics