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, Peter A. R. ORCID: https://orcid.org/0000-0002-5127-0401, 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. 2010. SPT-CL J0546-5345: A massive z>1 Galaxy Cluster selected via the Sunyaev-Zel'dovich effect with the South Pole Telescope. Astrophysical Journal 721 (1) , pp. 90-97. 10.1088/0004-637X/721/1/90

Full text not available from this repository.

Abstract

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(–1), 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 M (200) = 1.0(+0.6) (–0.4) × 10(15) M ☉, in agreement with the X-ray and SZE mass measurements. Combining masses from several independent measures leads to a best-estimate mass of M (200) = (7.95 ± 0.92) × 10(14 )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.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Uncontrolled Keywords:	galaxies: clusters: individual (SPT-CL J0546-5345); galaxies: distances and redshifts; galaxies: evolution
Publisher:	IOPScience
ISSN:	0004-637X
Last Modified:	20 Oct 2022 09:58
URI:	https://orca.cardiff.ac.uk/id/eprint/33741

Citation Data

Cited 95 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item