New Results from the Atacama Cosmology Telescope: Physical Properties of SZE Galaxy Clusters on the Celestial Equator
Abstract
We present the optical and X-ray properties of galaxy clusters selected via the Sunyaev-Zel'dovich Effect (SZE) by the Atacama Cosmology Telescope (ACT) observing at a frequency of 148 GHz. The sample includes 49 clusters confirmed using Sloan Digital Sky Survey (SDSS) deep multi-band optical imaging over Stripe 82 as well as additional near-infrared pointed observations with the Apache Point Observatory. An additional 19 clusters lying beyond the footprint of Stripe 82 are confirmed using regular-depth SDSS imaging. The sample properties we present are optical richness, separation between the SZE position and the brightest cluster galaxy, and X-ray fluxes and luminosities from the ROSAT All Sky Survey. As time permits, we will highlight some of the most exceptional individual clusters in the ACT equatorial sample. We gratefully acknowledge support from NASA (Chandra grants numbered GO1-12008X and GO1-13156X and ADAP grant NNX11AJ48G).
- Publication:
-
American Astronomical Society Meeting Abstracts #221
- Pub Date:
- January 2013
- Bibcode:
- 2013AAS...22112406H