Abstract
We report on the X-ray properties of the exceptional X-ray cluster RXJ1347.5-1145 at z=0.451. We confirm that it is with a luminosity LX(bol) = 2 × 1046 erg/s the most luminous X-ray cluster discovered to date. The mass of the cluster within 1.7 Mpc is 9.8 × 1014 script M sign⊙. A comparison of the central X-ray mass and the mass determined from a simple gravitational lens model shows a discrepancy of a factor of 2-3 with the X-ray mass being smaller. The temperature of the cluster is 9.3+1.1-1.0 keV. We detect a strong FeK line corresponding to a metallicity of 0.33±0.10 in solar units, which is an unexpectedly high value for a distant and hot cluster. There are several hints that the cluster contains an extremely strong cooling flow. With the usual assumptions we derive formally a mass accretion rate of more than 3000 script M sign⊙/yr indicating that this may be the largest cooling flow detected so far. To find these extreme properties in this distant cluster which can be taken as an indication of a well relaxed and old system is of high importance for the theory of formation and evolution of clusters.
| Original language | English |
|---|---|
| Pages (from-to) | 646-655 |
| Number of pages | 10 |
| Journal | Astronomy and Astrophysics |
| Volume | 317 |
| Issue number | 3 |
| Publication status | Published - 1997 Jan 20 |
Keywords
- Cooling flows
- Cosmology: observations
- Dark matter
- Galaxies: clusters: individual: Rxj1347.5-1145
- Inter galactic medium
- X-rays: galaxies