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Implications of a high angular resolution image of the Sunyaev-Zel'dovich Effect in RXJ1347-1145

Mason, B. S., Dicker, S. R., Korngut, P. M., Devlin, M. J., Cotton, W. D., Koch, P. M., Molnar, S. M., Sievers, J., Aguirre, J. E., Benford, D., Staguhn, J. G., Moseley, H., Irwin, K. D. and Ade, Peter A. R. 2010. Implications of a high angular resolution image of the Sunyaev-Zel'dovich Effect in RXJ1347-1145. The Astrophysical Journal 716 (1) , p. 739. 10.1088/0004-637X/716/1/739

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Abstract

The most X-ray luminous cluster known, RXJ1347–1145 (z = 0.45), has been the object of extensive study across the electromagnetic spectrum. We have imaged the Sunyaev-Zel'dovich effect (SZE) at 90 GHz (λ = 3.3 mm) in RXJ1347–1145 at 10'' resolution with the 64 pixel MUSTANG bolometer array on the Green Bank Telescope, confirming a previously reported strong, localized enhancement of the SZE 20'' to the southeast of the center of X-ray emission. This enhancement of the SZE has been interpreted as shock-heated (>20 keV) gas caused by an ongoing major (low mass ratio) merger event. Our data support this interpretation. We also detect a pronounced asymmetry in the projected cluster pressure profile, with the pressure just east of the cluster core ~1.6× higher than just to the west. This is the highest resolution image of the SZE made to date.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: cosmic background radiation; cosmology: observations; galaxies: clusters: individual (RXJ1347–1145)
Publisher: IOPScience
ISSN: 0004-637X
Last Modified: 04 Jun 2017 04:09
URI: http://orca.cf.ac.uk/id/eprint/33702

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