SPT-CL J0546-5345
_(weic2418d).jpg)
| Right ascension | 05h 46m 37s[1] |
|---|---|
| Declination | −53° 45′ 39.6″[1] |
| Redshift | 1.067[2] |
| Mass | 4.85 x 1014[3][4] |
SPT-CL J0546-5345 is a massive galaxy cluster discovered at the South Pole Telescope in 2008 and was the first galaxy cluster discovered at > 1 using the Sunyaev–Zeldovich effect.[2][5][6][7] It is thought to be 7 billion light years away and has a redshift of z=1.067.[2]
The cluster hosts 49 galaxy members and has an estimated total mass of 4.85 x 1014 based on the Sunyaev-Zel'dovich-effect.[3][4] The cluster field has a galaxy density of approximately galaxies per arcminute, according to ACS data.[3][4]
After its discovery and until 2011 with the discovery of SPT-CL J2106-5844, this cluster was the most massive known galaxy cluster at z>1.[8] Chandra observations measured the cluster's X-ray temperature as .[1] Follow-up observations using the Spitzer, Chandra, and other optical telescopes have allowed for identification and redshift measurements of cluster members within the galaxy.
SPT-CL J0546-5345 formed early through major galaxy mergers and later experienced adiabatic expansion driven by AGN winds causing mass loss.[3]
a total of 21 cluster members were identified, with 18 out of 21 exhibiting spectral features of Ca H & K lines while 3 displayed singly ionized oxygen (O) lines. The cluster was also found to have a velocity dispersion of km s. At the time of its discovery, SPT-CL J0546-5345 was the most dynamically massive cluster identified at > 1.[2]
See also
References
Template:S-start Template:S-bef Template:S-ttl Template:S-aft Template:S-end