Scaling relations and X-ray properties of moderate-luminosity galaxy clusters from 0.3 < z < 0.6 with XMM-Newton

Journal Article · Fri Oct 10 04:00:00 EDT 2014 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/794/1/48· OSTI ID:22370484

Connor, Thomas; Donahue, Megan ^[1]; Sun, Ming ^[2]; Hoekstra, Henk ^[3]; Mahdavi, Andisheh ^[4]; Conselice, Christopher J. ^[5]; McNamara, Brian ^[6]

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1. Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48823 (United States)
2. Department of Physics, University of Alabama in Huntsville, Huntsville, AL 35899 (United States)
3. Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA, Leiden (Netherlands)
4. Department of Physics and Astronomy, San Francisco State University, San Francisco, CA 94131 (United States)
5. University of Nottingham, School of Physics and Astronomy, Nottingham NG7 2RD (United Kingdom)
6. Department of Physics and Astronomy, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 5M3 (Canada)

We present new X-ray temperatures and improved X-ray luminosity estimates for 15 new and archival XMM-Newton observations of galaxy clusters at intermediate redshift with mass and luminosities near the galaxy group/cluster division (M{sub 2500}<2.4×10{sup 14} h{sub 70}{sup −1} M{sub ⊙}, L < 2 × 10{sup 44} erg s{sup –1}, 0.3 < z < 0.6). These clusters have weak-lensing mass measurements based on Hubble Space Telescope observations of clusters representative of an X-ray-selected sample (the ROSAT 160SD survey). The angular resolution of XMM-Newton allows us to disentangle the emission of these galaxy clusters from nearby point sources, which significantly contaminated previous X-ray luminosity estimates for 6 of the 15 clusters. We extend cluster scaling relations between X-ray luminosity, temperature, and weak-lensing mass for low-mass, X-ray-selected clusters out to redshift ∼0.45. These relations are important for cosmology and the astrophysics of feedback in galaxy groups and clusters. Our joint analysis with a sample of 50 clusters in a similar redshift range but with larger masses (M {sub 500} < 21.9 × 10{sup 14} M {sub ☉}, 0.15 ≤ z ≤ 0.55) from the Canadian Cluster Comparison Project finds that within r {sub 2500}, M∝L {sup 0.44±0.05}, T∝L {sup 0.23±0.02}, and M∝T {sup 1.9±0.2}. The estimated intrinsic scatter in the M-L relation for the combined sample is reduced to σ{sub log(M|L)} = 0.10, from σ{sub log} {sub (M|L)} = 0.26 with the original ROSAT measurements. We also find an intrinsic scatter for the T-L relation, σ{sub log} {sub (T|L)} = 0.07 ± 0.01.

• OSTI ID: 22370484
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 794; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ASTROPHYSICS
COSMOLOGY
EMISSION
FEEDBACK
GALAXY CLUSTERS
GRAVITATIONAL LENSES
LUMINOSITY
MASS
POINT SOURCES
RED SHIFT
RESOLUTION
SPACE
TELESCOPES
X RADIATION
X-RAY GALAXIES