2010ApJ...721...90B

Query : 2010ApJ...721...90B

2010ApJ...721...90B - Astrophys. J., 721, 90-97 (2010/September-3)

SPT-CL J0546-5345: a massive z>1 galaxy cluster selected via the Sunyaev-Zel'dovich effect with the south pole telescope.

BRODWIN M., RUEL J., ADE P.A.R., AIRD K.A., ANDERSSON K., ASHBY M.L.N., BAUTZ M., BAZIN G., BENSON B.A., BLEEM L.E., CARLSTROM J.E., CHANG C.L., CRAWFORD T.M., CRITES A.T., DE HAAN T., DESAI S., DOBBS M.A., DUDLEY J.P., FAZIO G.G., FOLEY R.J., FORMAN W.R., GARMIRE G., GEORGE E.M., GLADDERS M.D., GONZALEZ A.H., HALVERSON N.W., HIGH F.W., HOLDER G.P., HOLZAPFEL W.L., HRUBES J.D., JONES C., JOY M., KEISLER R., KNOX L., LEE A.T., LEITCH E.M., LUEKER M., MARRONE D.P., McMAHON J.J., MEHL J., MEYER S.S., MOHR J.J., MONTROY T.E., MURRAY S.S., PADIN S., PLAGGE T., PRYKE C., REICHARDT C.L., REST A., RUHL J.E., SCHAFFER K.K., SHAW L., SHIROKOFF E., SONG J., SPIELER H.G., STALDER B., STANFORD S.A., STANISZEWSKI Z., STARK A.A., STUBBS C.W., VANDERLINDE K., VIEIRA J.D., VIKHLININ A., WILLIAMSON R., YANG Y., ZAHN O. and ZENTENO A.

Abstract (from CDS):

We report the spectroscopic confirmation of SPT-CL J0546-5345 at 〈z〉 = 1.067. To date this is the most distant cluster to be spectroscopically confirmed from the 2008 South Pole Telescope (SPT) catalog, and indeed the first z>1 cluster discovered by the Sunyaev-Zel'dovich Effect (SZE). We identify 21 secure spectroscopic members within 0.9 Mpc of the SPT cluster position, 18 of which are quiescent, early-type galaxies. From these quiescent galaxies we obtain a velocity dispersion of 1179⁺²³²_–167 km/s, ranking SPT-CL J0546-5345 as the most dynamically massive cluster yet discovered at z>1. Assuming that SPT-CL J0546-5345 is virialized, this implies a dynamical mass of M₂₀₀= 1.0^+0.6_–0.4x10¹⁵ M_☉, in agreement with the X-ray and SZE mass measurements. Combining masses from several independent measures leads to a best-estimate mass of M₂₀₀= (7.95±0.92)x10¹⁴ M_☉. The spectroscopic confirmation of SPT-CL J0546-5345, discovered in the wide-angle, mass-selected SPT cluster survey, marks the onset of the high-redshift SZE-selected galaxy cluster era.

Abstract Copyright: ∼

Journal keyword(s): galaxies: clusters: individual: SPT-CL J0546-5345 - galaxies: distances and redshifts - galaxies: evolution

Nomenclature: Fig. 1, Table 1: [BRA2010] JHHMMSS.s+DDMMSS N=21.

Simbad objects: 23

Full paper

View the references in ADS

Number of rows : 23

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag I	Sp type	#ref 1850 - 2026	#notes
1	SMH J054630.3-534425.4	G	05 46 30.37	-53 44 25.3		~	4	0
2	SMH J054633.6-534540.6	G	05 46 33.67	-53 45 40.5	22.23	~	6	0
3	SMH J054633.8-534409.2	G	05 46 33.86	-53 44 09.3		~	4	0
4	SMH J054634.8-534555.4	G	05 46 34.81	-53 45 55.6	22.62	~	5	0
5	SMH J054634.9-534437.3	G	05 46 34.92	-53 44 37.5		~	4	0
6	SMH J054635.1-534501.8	G	05 46 35.14	-53 45 02.0	22.75	~	5	0
7	SMH J054635.8-534542.1	G	05 46 35.82	-53 45 42.0	23.09	~	5	0
8	SMH J054636.2-534413.2	G	05 46 36.22	-53 44 13.4		~	4	0
9	SMH J054636.4-534619.5	G	05 46 36.43	-53 46 19.5		~	4	0
10	SMH J054637.2-534525.5	G	05 46 37.23	-53 45 25.6	22.97	~	5	0
11	ACT-CL J0546.6-5345	ClG	05 46 37.6557	-53 45 33.242		~	98	0
12	SMH J054638.6-534513.6	G	05 46 38.68	-53 45 13.7		~	4	0
13	SMH J054638.8-534620.2	G	05 46 38.80	-53 46 20.2		~	4	0
14	SMH J054638.9-534355.9	G	05 46 38.90	-53 43 56.2		~	4	0
15	SMH J054641.8-534613.4	G	05 46 41.84	-53 46 13.5		~	4	0
16	SMH J054642.0-534543.9	G	05 46 42.08	-53 45 43.9		~	5	0
17	SMH J054642.3-534554.3	G	05 46 42.36	-53 45 54.5		~	4	0
18	SMH J054644.3-534538.1	G	05 46 44.36	-53 45 38.4		~	4	0
19	SMH J054644.4-534502.5	G	05 46 44.42	-53 45 02.7		~	4	0
20	SMH J054645.0-534626.0	G	05 46 45.04	-53 46 25.9		~	4	0
21	SMH J054646.8-534557.2	G	05 46 46.87	-53 45 57.6		~	4	0
22	SMH J054646.8-534610.9	G	05 46 46.89	-53 46 10.9		~	4	0
23	ACO 1656	ClG	12 59 44.40	+27 54 44.9		~	5141	2

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