2012/02/07 by Krishnan Mody, Amir Hajian · 1 citation
Physics and Astronomy · #Astronomy #Astrophysics #CMB cold spot #Cluster (spacecraft) #Computer science #Cosmic microwave background #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy cluster #Physics #Planck #ROSAT #Sky #Sunyaev–Zel'dovich effect #astro-ph.CO #gr-qc
paper · pdf · doi:10.1088/0004-637x/758/1/4
published as The Astrophysical Journal, Volume 758, Issue 1, article id. 4 (2012) · 6 pages, 3 figures
arxiv created 2012/02/07 · openalex publication_date 2012/09/18 · arxiv updated 2012/11/14 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present our measurement of the "bulk flow" using the kinetic Sunyaev–Zel'dovich (kSZ) effect in the Wilkinson Microwave Anisotropy Probe ( WMAP ) seven-year data. As the tracer of peculiar velocities, we use Planck Early Sunyaev–Zel'dovich Detected Cluster Catalog and a compilation of X-ray-detected galaxy cluster catalogs based on ROSAT All-Sky Survey. We build a full-sky kSZ template and fit it to the WMAP data in W band. Using a Wiener filter we maximize the signal-to-noise ratio of the kSZ cluster signal in the data. We find no significant detection of the bulk flow, and our results are consistent with the ΛCDM prediction.