2010ApJ...723.1736H

Query : 2010ApJ...723.1736H

2010ApJ...723.1736H - Astrophys. J., 723, 1736-1747 (2010/November-2)

Optical redshift and richness estimates for galaxy clusters selected with the Sunyaev-Zel'dovich effect from 2008 south pole telescope observations.

HIGH F.W., STALDER B., SONG J., ADE P.A.R., AIRD K.A., ALLAM S.S., ARMSTRONG R., BARKHOUSE W.A., BENSON B.A., BERTIN E., BHATTACHARYA S., BLEEM L.E., BRODWIN M., BUCKLEY-GEER E.J., CARLSTROM J.E., CHALLIS P., CHANG C.L., CRAWFORD T.M., CRITES A.T., DE HAAN T., DESAI S., DOBBS M.A., DUDLEY J.P., FOLEY R.J., GEORGE E.M., GLADDERS M., HALVERSON N.W., HAMUY M., HANSEN S.M., HOLDER G.P., HOLZAPFEL W.L., HRUBES J.D., JOY M., KEISLER R., LEE A.T., LEITCH E.M., LIN H., LIN Y.-T., LOEHR A., LUEKER M., MARRONE D., McMAHON J.J., MEHL J., MEYER S.S., MOHR J.J., MONTROY T.E., MORELL N., NGEOW C.-C., PADIN S., PLAGGE T., PRYKE C., REICHARDT C.L., REST A., RUEL J., RUHL J.E., SCHAFFER K.K., SHAW L., SHIROKOFF E., SMITH R.C., SPIELER H.G., STANISZEWSKI Z., STARK A.A., STUBBS C.W., TUCKER D.L., VANDERLINDE K., VIEIRA J.D., WILLIAMSON R., WOOD-VASEY W.M., YANG Y., ZAHN O. and ZENTENO A.

Abstract (from CDS):

We present redshifts and optical richness properties of 21 galaxy clusters uniformly selected by their Sunyaev-Zel'dovich (SZ) signature. These clusters, plus an additional, unconfirmed candidate, were detected in a 178 deg2 area surveyed by the South Pole Telescope (SPT) in 2008. Using griz imaging from the Blanco Cosmology Survey and from pointed Magellan telescope observations, as well as spectroscopy using Magellan facilities, we confirm the existence of clustered red-sequence galaxies, report red-sequence photometric redshifts, present spectroscopic redshifts for a subsample, and derive R200radii and M200 masses from optical richness. The clusters span redshifts from 0.15 to greater than 1, with a median redshift of 0.74; three clusters are estimated to be at z>1. Redshifts inferred from mean red-sequence colors exhibit 2% rms scatter in σz/(1 + z) with respect to the spectroscopic subsample for z < 1. We show that the M200 cluster masses derived from optical richness correlate with masses derived from SPT data and agree with previously derived scaling relations to within the uncertainties. Optical and infrared imaging is an efficient means of cluster identification and redshift estimation in large SZ surveys, and exploiting the same data for richness measurements, as we have done, will be useful for constraining cluster masses and radii for large samples in cosmological analysis.

Abstract Copyright: ∼

Journal keyword(s): cosmology: observations - galaxies: clusters: general

Simbad objects: 27

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Number of rows : 27
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 J0000.9-5748 ClG 00 01 00 -57 48.5           ~ 57 0
2 ACT-CL J0509.3-5342 ClG 05 09 21.40 -53 42 12.3           ~ 62 0
3 ACT-CL J0511.6-5154 ClG 05 11 41.31 -51 54 20.8           ~ 22 0
4 ACO S 520 ClG 05 16 37.40 -54 30 01.5           ~ 114 0
5 SPT-CL J0517-5430 ClG 05 17.0 -54 30           ~ 7 0
6 ACT-CL J0521.2-5104 ClG 05 21 12.6431 -51 04 18.700           ~ 21 0
7 ACT-CL J0528-5259 ClG 05 28 05.30 -52 59 52.8           ~ 52 0
8 SPT-CL J0533-5005 ClG 05 33 37 -50 05.8           ~ 37 0
9 ACT-CL J0539.9-5744 ClG 05 39 59.538 -57 44 37.28           ~ 20 0
10 ACT-CL J0546.6-5345 ClG 05 46 37.6557 -53 45 33.242           ~ 98 0
11 ACO S 552 ClG 05 51 08 -57 06.3           ~ 6 0
12 ACT-CL J0551.6-5709 ClG 05 51 36.000 -57 09 22.00           ~ 37 0
13 ACT-CL J0559.7-5249 ClG 05 59 43.20 -52 49 27.1           ~ 63 0
14 ACO 3950 ClG 23 00 01.104 -56 17 05.64           ~ 21 0
15 6dFGS gJ230001.1-561706 G 23 00 01.1192284032 -56 17 05.758388520   17.80   16.17   ~ 3 0
16 SUMSS J230039-533116 Bla 23 00 39.7245361488 -53 31 11.890928136           ~ 18 0
17 ACO S 1079 ClG 23 00 41.8 -53 31 28           ~ 21 0
18 SPT-CL J2301-5546 ClG 23 01 53 -55 46.6           ~ 16 0
19 PSZSPT J2331-5052 ClG 23 31 51 -50 51.9           ~ 53 0
20 SPT-CL J2332-5521 ClG 23 32.0 -55 21           ~ 1 0
21 ACT-CL J2332.4-5358 ClG 23 32 26.70 -53 58 20.4           ~ 52 0
22 ACT-CL J2337.4-5942 ClG 23 37 24.2 -59 42 17           ~ 52 0
23 ACT-CL J2341.2-5119 ClG 23 41 12.3 -51 19 43           ~ 52 0
24 ACT-CL J2342.7-5411 ClG 23 42 45.6153 -54 11 11.527           ~ 44 0
25 SPT-CL J2343-5521 ClG 23 43 02 -55 21.8           ~ 7 0
26 ACT-CL J2355.7-5055 ClG 23 55 49.000 -50 56 13.00           ~ 37 0
27 ACT-CL J2359.7-5010 ClG 23 59 44 -50 10.2           ~ 38 0

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