X-Ray Studies of Galactic and Intergalactic Gas in the Pegasus I Cluster
Abstract
Observations of Pegasus I with the Einstein Observatory IPC reveal hot gas in a low-density intergalactic medium and in a galactic medium within each of the dominant elliptical galaxies NGC 7619 and NGC 7626. The galaxies have X-ray luminosities of 8 and 3×1041ergs s-1 respectively, temperatures of ≡107K, mean gas densities of ≡10-3cm-3 and gas masses of ≡1010M_sun;. The intergalactic gas has a luminosity of 1×1042ergs s-1, a density of ≡2×10-4cm-3, a mass of ≡4×1011M_sun;, and a temperature of ≡107K.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- May 1986
- DOI:
- Bibcode:
- 1986ApJ...304..312C
- Keywords:
-
- Galactic Clusters;
- Heao 2;
- Intergalactic Media;
- X Ray Astronomy;
- X Ray Sources;
- Cooling Flows (Astrophysics);
- Elliptical Galaxies;
- Luminosity;
- Astrophysics;
- GALAXIES: CLUSTERING;
- GALAXIES: INTERGALACTIC MEDIUM;
- GALAXIES: X-RAYS;
- X-RAYS: SOURCES