2015MNRAS.449.2219M

Query : 2015MNRAS.449.2219M

2015MNRAS.449.2219M - Mon. Not. R. Astron. Soc., 449, 2219-2238 (2015/May-3)

Mass and galaxy distributions of four massive galaxy clusters from Dark Energy Survey Science Verification data.

MELCHIOR P., SUCHYTA E., HUFF E., HIRSCH M., KACPRZAK T., RYKOFF E., GRUEN D., ARMSTRONG R., BACON D., BECHTOL K., BERNSTEIN G.M., BRIDLE S., CLAMPITT J., HONSCHEID K., JAIN B., JOUVEL S., KRAUSE E., LIN H., MACCRANN N., PATTON K., PLAZAS A., ROWE B., VIKRAM V., WILCOX H., YOUNG J., ZUNTZ J., ABBOTT T., ABDALLA F.B., ALLAM S.S., BANERJI M., BERNSTEIN J.P., BERNSTEIN R.A., BERTIN E., BUCKLEY-GEER E., BURKE D.L., CASTANDER F.J., DA COSTA L.N., CUNHA C.E., DEPOY D.L., DESAI S., DIEHL H.T., DOEL P., ESTRADA J., EVRARD A.E., NETO A.F., FERNANDEZ E., FINLEY D.A., FLAUGHER B., FRIEMAN J.A., GAZTANAGA E., GERDES D., GRUENDL R.A., GUTIERREZ G.R., JARVIS M., KARLINER I., KENT S., KUEHN K., KUROPATKIN N., LAHAV O., MAIA M.A.G., MAKLER M., MARRINER J., MARSHALL J.L., MERRITT K.W., MILLER C.J., MIQUEL R., MOHR J., NEILSEN E., NICHOL R.C., NORD B.D., REIL K., ROE N.A., ROODMAN A., SAKO M., SANCHEZ E., SANTIAGO B.X., SCHINDLER R., SCHUBNELL M., SEVILLA-NOARBE I., SHELDON E., SMITH C., SOARES-SANTOS M., SWANSON M.E.C., SYPNIEWSKI A.J., TARLE G., THALER J., THOMAS D., TUCKER D.L., WALKER A., WECHSLER R., WELLER J. and WESTER W.

Abstract (from CDS):

We measure the weak lensing masses and galaxy distributions of four massive galaxy clusters observed during the Science Verification phase of the Dark Energy Survey (DES). This pathfinder study is meant to (1) validate the Dark Energy Camera (DECam) imager for the task of measuring weak lensing shapes, and (2) utilize DECam's large field of view to map out the clusters and their environments over 90 arcmin. We conduct a series of rigorous tests on astrometry, photometry, image quality, point spread function (PSF) modelling, and shear measurement accuracy to single out flaws in the data and also to identify the optimal data processing steps and parameters. We find Science Verification data from DECam to be suitable for the lensing analysis described in this paper. The PSF is generally well behaved, but the modelling is rendered difficult by a flux-dependent PSF width and ellipticity. We employ photometric redshifts to distinguish between foreground and background galaxies, and a red-sequence cluster finder to provide cluster richness estimates and cluster-galaxy distributions. By fitting Navarro-Frenk-White profiles to the clusters in this study, we determine weak lensing masses that are in agreement with previous work. For Abell 3261, we provide the first estimates of redshift, weak lensing mass, and richness. In addition, the cluster-galaxy distributions indicate the presence of filamentary structures attached to 1E 0657-56 and RXC J2248.7-4431, stretching out as far as 1°(approximately 20 Mpc), showcasing the potential of DECam and DES for detailed studies of degree-scale features on the sky.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): gravitational lensing: weak - galaxies: clusters: individual: RXC J2248.7-4431 - galaxies: clusters: individual: 1E 0657-56 - galaxies: clusters: individual: SCSO J233227-535827 - galaxies: clusters: individual: Abell 3261 - cosmology: observations

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ACT-CL J0102-4915 ClG 01 02 52.50 -49 14 58.0           ~ 296 0
2 ACO 3261 ClG 04 29 15.30 -60 19 32.0           ~ 3 0
3 ClG 0657-56 ClG 06 58 26.9 -55 58 21           ~ 1077 1
4 ACO S 1063 ClG 22 48 45.4 -44 31 42           ~ 395 0
5 ACT-CL J2332.4-5358 ClG 23 32 26.70 -53 58 20.4           ~ 52 0

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