GINGA observation of distant galaxy clusters : temperature and iron abundance of A 2507 and A 483.
Abstract
We observed with the GINGA LAC experiment 3 distant clusters of galaxies: A33 (z=0.28), A483 (z=0.28) and A2507 (z=0.196). No significant flux is observed in the direction of A33. We measured the X-ray spectra of A483 and A2507 in the energy range 1-17 keV and deduced their temperature and iron abundance: kT~8.4 keV and 9.5 keV for A483 and A2507 respectively; [Fe]~0.3 the solar value. A2507 and A483 are thus the most distant clusters for which such measurements exist. We compared these data to the data already available on less distant clusters within the same range of luminosity. No evolutionary effect is observed.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- March 1991
- Bibcode:
- 1991A&A...243...56A
- Keywords:
-
- Galactic Clusters;
- Galactic Evolution;
- Ginga Satellite;
- Intergalactic Media;
- Iron;
- Metallicity;
- Satellite Observation;
- Abundance;
- Interstellar Gas;
- Japanese Space Program;
- X Ray Sources;
- X Ray Spectroscopy;
- Astrophysics