Peculiar velocity constraints from five-band SZ effect measurements toward RX J1347.5−1145 with music and Bolocam from the CSO

Journal Article · Fri Apr 01 04:00:00 EDT 2016 · Astrophysical Journal

DOI:https://doi.org/10.3847/0004-637X/820/2/101· OSTI ID:22890104

Sayers, Jack; Golwala, Sunil R.; Siegel, Seth R.; Hollister, Matthew I.; Lam, Albert; Miller, David A. ^[1]; Zemcov, Michael ^[2]; Glenn, Jason; Maloney, Philip R.; Wheeler, Jordan; Brugger, Spencer ^[3]; Bockstiegel, Clint; Mazin, Benjamin A.; McHugh, Sean G. ^[4]; Czakon, Nicole G. ^[5]; Day, Peter K.; LeDuc, Henry G. ^[6]; Downes, Thomas P. ^[7]; Duan, Ran P. ^[8]; Gao, Jiansong ^[9] ; others, and

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1. Division of Physics, Math, and Astronomy, California Institute of Technology, Pasadena, CA 91125 (United States)
2. Rochester Institute of Technology, Rochester, NY 14623 (United States)
3. Department of Astrophysical and Planetary Science, University of Colorado, Boulder, CO 80309 (United States)
4. Department of Physics, University of California, Santa Barbara, CA 93106 (United States)
5. Institute of Astronomy and Astrophysics, Academia Sinica, Taipei, Taiwan (China)
6. Jet Propulsion Laboratory, Pasadena, CA 91109 (United States)
7. Department of Physics, University of Wisconsin, Milwaukee, WI 53201 (United States)
8. National Astronomical Observatories, Chinese Academy of Sciences, Chaoyang District, Beijing (China)
9. National Institute of Standards and Technology, Boulder, CO 80305 (United States)

We present Sunyaev-Zel’dovich (SZ) effect measurements from wide-field images toward the galaxy cluster RX J1347.5−1145 obtained from the Caltech Submillimeter Observatory with the Multiwavelength Submillimeter Inductance Camera at 147, 213, 281, and 337 GHz and with Bolocam at 140 GHz. As part of our analysis, we have used higher frequency data from Herschel–SPIRE and previously published lower frequency radio data to subtract the signal from the brightest dusty star-forming galaxies behind RX J1347.5−1145 and from the AGN in RX J1347.5−1145’s BCG. Using these five-band SZ effect images, combined with X-ray spectroscopic measurements of the temperature of the intra-cluster medium (ICM) from Chandra, we constrain the ICM optical depth to be τ{sub e}=7.33{sub −0.97}{sup +0.96}×10{sup −3} and the ICM line of sight peculiar velocity to be v{sub pec}=−1040{sub −840}{sup +870} km s{sup −1}. The errors for both quantities are limited by measurement noise rather than calibration uncertainties or astrophysical contamination, and significant improvements are possible with deeper observations. Our best-fit velocity is in good agreement with one previously published SZ effect analysis and in mild tension with the other, although some or all of that tension may be because that measurement samples a much smaller cluster volume. Furthermore, our best-fit optical depth implies a gas mass slightly larger than the Chandra-derived value, implying the cluster is elongated along the line of sight.

• OSTI ID: 22890104
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 2 Vol. 820; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United Kingdom
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ASTROPHYSICS
CALIBRATION
GALAXIES
GALAXY CLUSTERS
GHZ RANGE 100-1000
MASS
STARS
VELOCITY
X RADIATION