Skip to main content

The Atacama Cosmology Telescope: The Two-season ACTPol Sunyaev-Zel’dovich Effect Selected Cluster Catalog

Author(s): Hilton, Matt; Hasselfield, Matthew; Sifon, Cristobal; Battaglia, Nicholas; Aiola, Simone; et al

To refer to this page use:
Abstract: We present a catalog of 182 galaxy clusters detected through the Sunyaev-Zel’dovich (SZ) effect by the Atacama Cosmology Telescope in a contiguous 987.5 deg(2) field. The clusters were detected as SZ decrements by applying a matched filter to 148 GHz maps that combine the original ACT equatorial survey with data from the first two observing seasons using the ACTPol receiver. Optical/IR confirmation and redshift measurements come from a combination of large public surveys and our own follow-up observations. Where necessary, we measured photometric redshifts for clusters using a pipeline that achieves accuracy Delta z/(1 + z) = 0.015 when tested on Sloan Digital Sky Survey data. Under the assumption that clusters can be described by the so-called universal pressure profile (UPP) and its associated mass scaling law, the full signal-to-noise ratio > 4 sample spans the mass range 1.6 < M-500c(UPP)/10(14) M-circle dot < 9.1, with median M-500c(UPP) = 3.1 x 10(14) M-circle dot. The sample covers the redshift range 0.1 < z < 1.4 (median z = 0.49), and 28 clusters are new discoveries (median z = 0.80). We compare our catalog with other overlapping cluster samples selected using the SZ, optical, and X-ray wavelengths. We find that the ratio of the UPP-based SZ mass to richness-based weak-lensing mass is < M-500c(UPP)>/< M-500c(lambda WL)> = 0.68 +/- 0.11. After applying this calibration, the mass distribution for clusters with M-500c > 4 x 10(14) M-circle dot is consistent with the number of such clusters found in the South Pole Telescope SZ survey.
Publication Date: Mar-2018
Electronic Publication Date: 8-Mar-2018
Citation: Hilton, Matt, Hasselfield, Matthew, Sifon, Cristobal, Battaglia, Nicholas, Aiola, Simone, Bharadwaj, V, Bond, J Richard, Choi, Steve K, Crichton, Devin, Datta, Rahul, Devlin, Mark J, Dunkley, Joanna, Dunner, Rolando, Gallardo, Patricio A, Gralla, Megan, Hincks, Adam D, Ho, Shuay-Pwu P, Hubmayr, Johannes, Huffenberger, Kevin M, Hughes, John P, Koopman, Brian J, Kosowsky, Arthur, Louis, Thibaut, Madhavacheril, Mathew S, Marriage, Tobias A, Maurin, Loic, McMahon, Jeff, Miyatake, Hironao, Moodley, Kavilan, Naess, Sigurd, Nati, Federico, Newburgh, Laura, Niemack, Michael D, Oguri, Masamune, Page, Lyman A, Partridge, Bruce, Schmitt, Benjamin L, Sievers, Jon, Spergel, David N, Staggs, Suzanne T, Trac, Hy, van Engelen, Alexander, Vavagiakis, Eve M, Wollack, Edward J. (2018). The Atacama Cosmology Telescope: The Two-season ACTPol Sunyaev-Zel’dovich Effect Selected Cluster Catalog. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 235 (10.3847/1538-4365/aaa6cb
DOI: doi:10.3847/1538-4365/aaa6cb
ISSN: 0067-0049
EISSN: 1538-4365
Related Item:;jsessionid=pcxKjd0AFe1EstttZeCSofiV
Type of Material: Journal Article
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

Items in OAR@Princeton are protected by copyright, with all rights reserved, unless otherwise indicated.