ASCA and XMM-Newton observations of A2029
Abstract
The restored ASCA image data of A2029 show that the radial distribution of hadness ratio is almost flat, except for the central region, corresponding to a nearly constant intracluster gas temperature of 7.7 keV. At the central region, the hardness ratio is very high and the X-ray spectrum is well fitted to the sum of a thermal bremsstrahlung and a power-law. The large values of photon index and hydrogen column density assigned to the power-law component suggest that an obscured BL Lac object is embedded in the central cD galaxy. The baryonic mass fraction of this cluster is consistent with that for the whole universe provided by WMAP. These results are compared with those obtained from XMM-Newton, and then the detailed physical and geometrical structures of this cluster are derived from them. The cosmological meanings of these results are also discussed.
- Publication:
-
35th COSPAR Scientific Assembly
- Pub Date:
- 2004
- Bibcode:
- 2004cosp...35.2317M