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Title: Velocity dispersion and dynamical mass for 270 galaxy clusters in the Planck PSZ1 catalogue

Journal Article · · Astronomy and Astrophysics
ORCiD logo [1];  [2];  [2];  [2];  [3];  [4];  [2];  [5];  [6]
  1. Institute of Astrophysics of the Canary Islands (Spain); Univ. of La Laguna (Spain); Sapienza University of Rome (Italy)
  2. Institute of Astrophysics of the Canary Islands (Spain); Univ. of La Laguna (Spain)
  3. Institute of Astrophysics of the Canary Islands (Spain); Univ. of La Laguna (Spain); Gran Telescopio Canarias (Spain)
  4. Purple Mountain Observatory, Nanjing (China); Institute of Astrophysics of the Canary Islands (Spain); Univ. of La Laguna (Spain)
  5. Univ. Andres Bello, Santiago (Chile); Max-Planck Institute for Astronomy (Germany)
  6. University of Tartu (Estonia)
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Here, we present the velocity dispersion and dynamical mass estimates for 270 galaxy clusters included in the first Planck Sunyaev-Zeldovich (SZ) source catalogue, the PSZ1. Part of the results presented here were achieved during a two-year observational program, the ITP, developed at the Roque de los Muchachos Observatory (La Palma, Spain). In the ITP we carried out a systematic optical follow-up campaign of all the 212 unidentified PSZ1 sources in the northern sky that have a declination above –15° and are without known counterparts at the time of the publication of the catalogue. We present for the first time the velocity dispersion and dynamical mass of 58 of these ITP PSZ1 clusters, plus 35 newly discovered clusters that are not associated with the PSZ1 catalogue. Using Sloan Digital Sky Survey archival data, we extend this sample, including 212 already confirmed PSZ1 clusters in the northern sky. Using a subset of 207 of these galaxy clusters, we constrained the MSZ–Mdyn scaling relation, finding a mass bias of (1 – B) = 0.83 ± 0.07(stat) ± 0.02(sys). We show that this value is consistent with other results in the literature that were obtained with different methods (X-ray, dynamical masses, or weak-lensing mass proxies). This result cannot dissolve the tension between primordial cosmic microwave background anisotropies and cluster number counts in the ΩM–σ8 plane.

Research Organization:
US Department of Energy (USDOE), Washington, DC (United States). Office of Science, Sloan Digital Sky Survey (SDSS)
Sponsoring Organization:
USDOE; Alfred P. Sloan Foundation; National Aeronautics and Space Administration (NASA); National Science Foundation (NSF)
OSTI ID:
1982275
Journal Information:
Astronomy and Astrophysics, Vol. 655; ISSN 0004-6361
Publisher:
EDP SciencesCopyright Statement
Country of Publication:
United States
Language:
English

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79 ASTRONOMY AND ASTROPHYSICS
large-scale structure of the universe
galaxy cluster