IMPLICATIONS OF A HIGH ANGULAR RESOLUTION IMAGE OF THE SUNYAEV-ZEL'DOVICH EFFECT IN RXJ1347-1145

Journal Article · Thu Jun 10 04:00:00 EDT 2010 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/716/1/739· OSTI ID:21451104

Mason, B S; Cotton, W D ^[1]; Dicker, S R; Korngut, P M; Devlin, M J; Aguirre, J E ^[2]; Koch, P M; Molnar, S M ^[3]; Sievers, J ^[4]; Benford, D; Staguhn, J G; Moseley, H ^[5]; Irwin, K D ^[6]; Ade, P ^[7]

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1. National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903 (United States)
2. University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104 (United States)
3. Institute of Astronomy and Astrophysics, Academia Sinica, P.O. Box 23-141, Taipei 10617, Taiwan (China)
4. The Canadian Institute of Theoretical Astrophysics, 60 St. George Street, Toronto, Ontario M5S 3H8 (Canada)
5. NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States)
6. National Institute of Standards and Technology, 325 Broadway, Boulder, CO 80303 (United States)
7. School of Physics and Astronomy, Cardiff University, 5 The Parade, Cardiff CF24 3AA (United Kingdom)

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 ({lambda} = 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 {approx}1.6x higher than just to the west. This is the highest resolution image of the SZE made to date.

• OSTI ID: 21451104
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 716; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ASYMMETRY
BACKGROUND RADIATION
BOLOMETERS
COSMOLOGY
ELECTROMAGNETIC RADIATION
GALAXY CLUSTERS
IONIZING RADIATIONS
MEASURING INSTRUMENTS
RADIATIONS
TELESCOPES
X RADIATION