2014ApJ...794...67M


C.D.S. - SIMBAD4 rel 1.7 - 2020.06.02CEST11:22:31

2014ApJ...794...67M - Astrophys. J., 794, 67 (2014/October-2)

The redshift evolution of the mean temperature, pressure, and entropy profiles in 80 SPT-selected galaxy clusters.

McDONALD M., BENSON B.A., VIKHLININ A., AIRD K.A., ALLEN S.W., BAUTZ M., BAYLISS M., BLEEM L.E., BOCQUET S., BRODWIN M., CARLSTROM J.E., CHANG C.L., CHO H.M., CLOCCHIATTI A., CRAWFORD T.M., CRITES A.T., DE HAAN T., DOBBS M.A., FOLEY R.J., FORMAN W.R., GEORGE E.M., GLADDERS M.D., GONZALEZ A.H., HALVERSON N.W., HLAVACEK-LARRONDO J., HOLDER G.P., HOLZAPFEL W.L., HRUBES J.D., JONES C., KEISLER R., KNOX L., LEE A.T., LEITCH E.M., LIU J., LUEKER M., LUONG-VAN D., MANTZ A., MARRONE D.P., McMAHON J.J., MEYER S.S., MILLER E.D., MOCANU L., MOHR J.J., MURRAY S.S., PADIN S., PRYKE C., REICHARDT C.L., REST A., RUHL J.E., SALIWANCHIK B.R., SARO A., SAYRE J.T., SCHAFFER K.K., SHIROKOFF E., SPIELER H.G., STALDER B., STANFORD S.A., STANISZEWSKI Z., STARK A.A., STORY K.T., STUBBS C.W., VANDERLINDE K., VIEIRA J.D., WILLIAMSON R., ZAHN O. and ZENTENO A.

Abstract (from CDS):

We present the results of an X-ray analysis of 80 galaxy clusters selected in the 2500 deg2 South Pole Telescope survey and observed with the Chandra X-ray Observatory. We divide the full sample into subsamples of ∼20 clusters based on redshift and central density, performing a joint X-ray spectral fit to all clusters in a subsample simultaneously, assuming self-similarity of the temperature profile. This approach allows us to constrain the shape of the temperature profile over 0 < r < 1.5R500, which would be impossible on a per-cluster basis, since the observations of individual clusters have, on average, 2000 X-ray counts. The results presented here represent the first constraints on the evolution of the average temperature profile from z = 0 to z = 1.2. We find that high-z (0.6 < z < 1.2) clusters are slightly (∼30%) cooler both in the inner (r < 0.1R500) and outer (r > R500) regions than their low-z (0.3 < z < 0.6) counterparts. Combining the average temperature profile with measured gas density profiles from our earlier work, we infer the average pressure and entropy profiles for each subsample. Confirming earlier results from this data set, we find an absence of strong cool cores at high z, manifested in this analysis as a significantly lower observed pressure in the central 0.1R500 of the high-z cool-core subset of clusters compared to the low-z cool-core subset. Overall, our observed pressure profiles agree well with earlier lower-redshift measurements, suggesting minimal redshift evolution in the pressure profile outside of the core. We find no measurable redshift evolution in the entropy profile at r ≲ 0.7R500–this may reflect a long-standing balance between cooling and feedback over long timescales and large physical scales. We observe a slight flattening of the entropy profile at r ≳ R500in our high-z subsample. This flattening is consistent with a temperature bias due to the enhanced (∼3x) rate at which group-mass (∼2 keV) halos, which would go undetected at our survey depth, are accreting onto the cluster at z ∼ 1. This work demonstrates a powerful method for inferring spatially resolved cluster properties in the case where individual cluster signal-to-noise is low, but the number of observed clusters is high.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: general - galaxies: clusters: intracluster medium - early universe - X-rays: galaxies: clusters

Status at CDS:  

Simbad objects: 12

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Number of rows : 12

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 SPT-CL J0014-4952 ClG 00 14 46 -49 52.9           ~ 16 0
2 SPT-CL J0037-5047 ClG 00 37 47 -50 47.3           ~ 14 0
3 ACT-CL J0102-4915 ClG 01 02 52.50 -49 14 58.0           ~ 150 0
4 2MAXI J0231-440 ClG 02 32 18.69 -44 20 41.5           ~ 79 0
5 ACT-CL J0237-4939 ClG 02 37 01.70 -49 38 10.0           ~ 18 0
6 RXC J0330.8-5228 ClG 03 30 38.9166 -52 30 08.784           ~ 34 0
7 SPT-CL J0522-5818 ClG 05 22.0 -58 18           ~ 1 0
8 SPT-CL J0551-5709 ClG 05 51 36.000 -57 09 22.00           ~ 29 0
9 ClG 0657-56 ClG 06 58 29.6 -55 56 39           ~ 795 1
10 MCXC J2011.3-5725 ClG 20 11 26.8 -57 25 09           ~ 32 0
11 ACO S 1063 ClG 22 48 54.3 -44 31 07           ~ 201 0
12 SPT-CL J2332-5053 ClG 23 32.0 -50 53           ~ 6 0

    Equat.    Gal    SGal    Ecl

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2020.06.02-11:22:31

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