Published June 1990
| Version v1
Journal article
The Extended Medium Sensitivity Survey distant cluster sample - X-ray cosmological evolution
Creators
- 1. Colorado Univ., Boulder (USA)
- 2. Mount Wilson and Las Campanas Observatories, Pasadena, CA (USA)
- 3. Osservatorio Astronomico, Bologna (Italy)
- 4. Hawaii Univ., Honolulu (USA)
- 5. CNR, Istituto di Radioastronomia, Bologna (Italy)
- 6. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (USA)
Description
The X-ray luminosity function of clusters of galaxies is determined at different cosmic epochs using data from the Einstein Observatory Extended Medium Sensitivity Survey. The sample consists of 67 X-ray-selected clusters that have been grouped in three redshift shells. Evolution is detected in the X-ray properties of clusters. The present volume density of high-luminosity clusters is found to be greater than it was in the past. Given the still limited data set, this result should be regarded as preliminary. It can be interpreted as the consequence of either luminosity evolution or modest density evolution. 22 refs
Additional details
Publishing Information
- Journal Title
- Astrophysical Journal
- Journal Volume
- 356
- Series
- Astrophys. J.
- Journal Page Range
- L35-L38
- ISSN
- 0004-637X
- CODEN
- ASJOA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 21085279
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- ASTROPHYSICS; COSMOLOGY; DENSITY; GALACTIC EVOLUTION; GALAXY CLUSTERS; LUMINOSITY; RED SHIFT; X RADIATION
- Descriptors DEC
- ELECTROMAGNETIC RADIATION; IONIZING RADIATIONS; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; RADIATIONS