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2016ApJ...833..194W - Astrophys. J., 833, 194-194 (2016/December-3)

A spectroscopic survey of the fields of 28 strong gravitational lenses: the group catalog.

WILSON M.L., ZABLUDOFF A.I., AMMONS S.M., MOMCHEVA I.G., WILLIAMS K.A. and KEETON C.R.

Abstract (from CDS):

With a large, unique spectroscopic survey in the fields of 28 galaxy-scale strong gravitational lenses, we identify groups of galaxies in the 26 adequately sampled fields. Using a group-finding algorithm, we find 210 groups with at least 5 member galaxies; the median number of members is 8. Our sample spans redshifts of 0.04 <= zgrp <= 0.76 with a median of 0.31, including 174 groups with 0.1 < zgrp < 0.6. The groups have radial velocity dispersions of 60 <= σgrp <= 1200 km s–1 with a median of 350 km s–1. We also discover a supergroup in field B0712+472 at z = 0.29 that consists of three main groups. We recover groups similar to ∼85% of those previously reported in these fields within our redshift range of sensitivity and find 187 new groups with at least five members. The properties of our group catalog, specifically, (1) the distribution of σgrp, (2) the fraction of all sample galaxies that are group members, and (3) the fraction of groups with significant substructure, are consistent with those for other catalogs. The distribution of group virial masses agrees well with theoretical expectations. Of the lens galaxies, 12 of 26 (46%) (B1422+231, B1600+434, B2114+022, FBQS J0951+2635, HE0435-1223, HST J14113+5211, MG0751+2716, MGJ1654+1346, PG 1115+080, Q ER 0047-2808, RXJ1131-1231, and WFI J2033-4723) are members of groups with at least five galaxies, and one more (B0712+472) belongs to an additional, visually identified group candidate. There are groups not associated with the lens that still are likely to affect the lens model; in six of 25 (24%) fields (excluding the supergroup), there is at least one massive (σgrp >= 500 km s–1) group or group candidate projected within 2' of the lens.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): catalogs - galaxies: groups: general - gravitational lensing: strong - gravitational lensing: strong

VizieR on-line data: <Available at CDS (J/ApJ/833/194): table[1-7].dat>

Nomenclature: Tables 1-2: [WZA2016] bHHMM NN N=48, [WZA2016] briHHMM NN N=5, [WZA2016] fbqHHMM NN> N=26, [WZA2016] h1413 N (Nos 0-4), [WZA2016] h12531 N (Nos 0-8), [WZA2016] heHHMM NN N=28, [WZA2016] hst14113 NN (Nos 0-15), [WZA2016] lbq1333 N (Nos 0-9), [WZA2016] mgHHMM NN N=35, [WZA2016] pg1115 NN (Nos 0-11), [WZA2016] qHHMM NN N=39, [WZA2016] rxj1131 NN (Nos 0-12), [WZA2016] sbs1520 N (Nos 0-8), [WZA2016] wfi2033 N (Nos 0-6). Tables 5-6: [WZA2016] bHHMM NN DDD.ddddd+DD.ddddd, [WZA2016] briHHMM NN DDD.ddddd+DD.ddddd, [WZA2016] fbqHHMM NN DDD.ddddd+DD.ddddd>, [WZA2016] h1413 N DDD.ddddd+DD.ddddd, [WZA2016] h12531 N DDD.ddddd+DD.ddddd>, [WZA2016] heHHMM NN DDD.ddddd+DD.ddddd, [WZA2016] hst14113 NN DDD.ddddd+DD.ddddd, [WZA2016] lbq1333 N DDD.ddddd+DD.ddddd, [WZA2016] mgHHMM NN DDD.ddddd+DD.ddddd, [WZA2016] pg1115 NN DDD.ddddd+DD.ddddd, [WZA2016] qHHMM NN DDD.ddddd+DD.ddddd, [WZA2016] rxj1131 NN DDD.ddddd+DD.ddddd, [WZA2016] sbs1520 N DDD.ddddd+DD.ddddd, [WZA2016] wfi2033 N DDD.ddddd+DD.ddddd N=3059. Table 7: [WZA2016] bHHMM R DDD.ddddd+DD.ddddd N=47, [WZA2016] briHHMM R DDD.ddddd+DD.ddddd> N=19, [WZA2016] h12531 R DDD.ddddd+DD.ddddd N=7, [WZA2016] heHHMM R DDD.ddddd+DD.ddddd N=31, [WZA2016] hst14113 R DDD.ddddd+DD.ddddd N=48, [WZA2016] mg1131 R DDD.ddddd+DD.ddddd N=7, [WZA2016] qHHMM R DDD.ddddd+DD.ddddd N=24, [WZA2016] rxj1131 R DDD.ddddd+DD.ddddd N=17, [WZA2016] wfi2033 R DDD.ddddd+DD.ddddd N=25.

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2019.12.06-04:43:24

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