A Sunyaev-Zeldovich Map of the Massive Core in the Luminous X-Ray Cluster RX J1347-1145
Abstract
We have mapped the Sunyaev-Zeldovich (SZ) decrement in the direction of the most luminous X-ray cluster known to date, RX J1347-1145, at z=0.451. This has been achieved with an angular resolution of about 23" using the Diabolo photometer running on the IRAM 30 m radio telescope. We present here a map of the cluster central region at 2.1 mm. The Comptonization parameter toward the cluster center, yc=(12.7+2.9-3.1)×10-4, corresponds to the deepest SZ decrement ever observed. Using the gas density distribution derived from X-ray data, this measurement implies a gas temperature of Te=16.2+/-3.8 keV. The resulting total mass of the cluster is, under hydrostatic equilibrium, M(r<1 Mpc)=(1.0+/-0.3)×1015 Msolar for a corresponding gas fraction fgas(r<1 Mpc)=19.5%+/-5.8%.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 1999
- DOI:
- 10.1086/312117
- Bibcode:
- 1999ApJ...519L.115P
- Keywords:
-
- COSMOLOGY: COSMIC MICROWAVE BACKGROUND;
- COSMOLOGY: OBSERVATIONS;
- GALAXIES: CLUSTERS: INDIVIDUAL: ALPHANUMERIC: RX J1347-1145;
- GALAXIES: INTERGALACTIC MEDIUM;
- Cosmology: Cosmic Microwave Background;
- Cosmology: Observations;
- Galaxies: Clusters: Individual: Alphanumeric: RX J1347-1145;
- Galaxies: Intergalactic Medium