SIMBAD references

2016MNRAS.461..248S - Mon. Not. R. Astron. Soc., 461, 248-270 (2016/September-1)

The Atacama Cosmology Telescope: dynamical masses for 44 SZ-selected galaxy clusters over 755 square degrees.

SIFON C., BATTAGLIA N., HASSELFIELD M., MENANTEAU F., BARRIENTOS L.F., BOND J.R., CRICHTON D., DEVLIN M.J., DUNNER R., HILTON M., HINCKS A.D., HLOZEK R., HUFFENBERGER K.M., HUGHES J.P., INFANTE L., KOSOWSKY A., MARSDEN D., MARRIAGE T.A., MOODLEY K., NIEMACK M.D., PAGE L.A., SPERGEL D.N., STAGGS S.T., TRAC H. and WOLLACK E.J.

Abstract (from CDS):

We present galaxy velocity dispersions and dynamical mass estimates for 44 galaxy clusters selected via the Sunyaev-Zel'dovich (SZ) effect by the Atacama Cosmology Telescope. Dynamical masses for 18 clusters are reported here for the first time. Using N-body simulations, we model the different observing strategies used to measure the velocity dispersions and account for systematic effects resulting from these strategies. We find that the galaxy velocity distributions may be treated as isotropic, and that an aperture correction of up to 7 per cent in the velocity dispersion is required if the spectroscopic galaxy sample is sufficiently concentrated towards the cluster centre. Accounting for the radial profile of the velocity dispersion in simulations enables consistent dynamical mass estimates regardless of the observing strategy. Cluster masses M_200 are in the range (1-15) x 10^14 M_☉. Comparing with masses estimated from the SZ distortion assuming a gas pressure profile derived from X-ray observations gives a mean SZ-to-dynamical mass ratio of 1.10±0.13, but there is an additional 0.14 systematic uncertainty due to the unknown velocity bias; the statistical uncertainty is dominated by the scatter in the mass-velocity dispersion scaling relation. This ratio is consistent with previous determinations at these mass scales.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: clusters: general - Galaxies: distances and redshifts - cosmology: observations - large-scale structure of Universe - large-scale structure of Universe

VizieR on-line data: <Available at CDS (J/MNRAS/461/248): tableb1.dat>

Nomenclature: Table B1: [SBH2016] JHHMMSS.ss+DDMMSS.s N=1239.

Status at CDS:   being processed
// All or part of tables of objects will be ingested in SIMBAD with priority 1.

Simbad objects: 47

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2016MNRAS.461..248S and select 'bookmark this link' or equivalent in the popup menu


2020.03.31-19:34:15

© Université de Strasbourg/CNRS

    • Contact