Temperature and elemental abundances in the Abell cluster A 576 derived from X-ray observations.
Abstract
Results of the Einstein Solid State Spectrometer (SSS) observations of the central region of Abell 576 combined with HEAO 1 spectra of the total cluster are reported. Line emission due to Fe, Si, and S from a hot plasma in the central region of the object are detected. Abundances roughly one-half of the solar value are derived for these elements. The total cluster spectrum is well fitted by a thermal bremsstrahlung model with a temperature of 4 +3.5 or -1.4 x 10 to the 7th K. This temperature is in conflict with the SSS temperature determination for the center of the cluster. This difference can be explained if cooling takes place in the central part of the cluster, or if the X-ray emission in the center is dominated by the emission of a single galaxy.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- April 1984
- DOI:
- 10.1086/161864
- Bibcode:
- 1984ApJ...279...53R
- Keywords:
-
- Abundance;
- Astronomical Spectroscopy;
- Galactic Clusters;
- Plasma Temperature;
- X Ray Sources;
- Emission Spectra;
- Heao 1;
- High Temperature Plasmas;
- Line Spectra;
- Spaceborne Astronomy;
- Temperature Measurement;
- Astrophysics