2003MNRAS.340..989S

Query : 2003MNRAS.340..989S

2003MNRAS.340..989S - Mon. Not. R. Astron. Soc., 340, 989-1010 (2003/April-2)

The Birmingham-CfA cluster scaling project - I. Gas fraction and the M -T Xrelation.

SANDERSON A.J.R., PONMAN T.J., FINOGUENOV A., LLOYD-DAVIES E.J. and MARKEVITCH M.

Abstract (from CDS):

We have assembled a large sample of virialized systems, comprising 66 galaxy clusters, groups and elliptical galaxies with high-quality X-ray data. To each system we have fitted analytical profiles describing the gas density and temperature variation with radius, corrected for the effects of central gas cooling. We present an analysis of the scaling properties of these systems and focus in this paper on the gas distribution and M -T Xrelation. In addition to clusters and groups, our sample includes two early-type galaxies, carefully selected to avoid contamination from group or cluster X-ray emission. We compare the properties of these objects with those of more massive systems and find evidence for a systematic difference between galaxy-sized haloes and groups of a similar temperature.

We derive a mean logarithmic slope of the M -TX relation within R200of 1.84±0.06, although there is some evidence of a gradual steepening in the M -TXrelation, with decreasing mass. We recover a similar slope using two additional methods of calculating the mean temperature. Repeating the analysis with the assumption of isothermality, we find the slope changes only slightly, to 1.89±0.04, but the normalization is increased by 30 per cent. Correspondingly, the mean gas fraction within R200 changes from (0.13±0.01)h–3/270^ to (0.11±0.01)h–3/270^, for the isothermal case, with the smaller fractional change reflecting different behaviour between hot and cool systems. There is a strong correlation between the gas fraction within 0.3R200 and temperature. This reflects the strong (5.8σ) trend between the gas density slope parameter, β, and temperature, which has been found in previous work.

These findings are interpreted as evidence for self-similarity breaking from galaxy feedback processes, active galactic nuclei heating or possibly gas cooling. We discuss the implications of our results in the context of a hierarchical structure formation scenario.


Abstract Copyright: 2003 RAS

Journal keyword(s): galaxies: clusters: general - galaxies: haloes - intergalactic medium - X-rays: galaxies - X-rays: galaxies: clusters

Simbad objects: 71

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Number of rows : 71
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 ACO 85 ClG 00 41 36.21 -09 19 30.4           ~ 909 0
2 ACO 119 ClG 00 56 08.57 -01 12 00.8           ~ 555 2
3 NAME NGC 383 Group GrG 01 07 27.7 +32 23 59   11.1 14.1     ~ 82 0
4 ZwCl 0120+3300 ClG 01 23 36.9 +33 15 03           ~ 78 0
5 NGC 507 BiC 01 23 39.950 +33 15 22.22   13.0       ~ 440 3
6 ACO 194 ClG 01 26 01.3 -01 22 02           ~ 350 2
7 ACO 262 ClG 01 52 50.4 +36 08 46           ~ 698 1
8 2A 0251+413 ClG 02 54 32.2 +41 35 10           ~ 315 1
9 ACO 399 ClG 02 57 56.4 +13 00 59           ~ 396 0
10 ACO 401 ClG 02 58 56.9 +13 34 56           ~ 566 0
11 ACO 3112 ClG 03 17 52.4 -44 14 35           ~ 311 1
12 NGC 1395 SyG 03 38 29.789 -23 01 39.69   10.71   8.99   ~ 279 0
13 ZwCl 0335+0956 ClG 03 38 35.3 +09 57 54           ~ 383 1
14 NGC 1459 EmG 03 46 57.9324314496 -25 31 18.301566252   13.62   12.54 13.3 ~ 52 0
15 ACO 478 ClG 04 13 20.7 +10 28 35           ~ 502 0
16 NGC 1553 GiP 04 16 10.4697802536 -55 46 48.072797400 10.76 10.10 9.40 8.74   ~ 377 2
17 ACO 3266 ClG 04 31 11.9 -61 24 23           ~ 410 0
18 ACO 496 ClG 04 33 38.8 -13 15 59           ~ 694 2
19 ACO 539 ClG 05 16 35.1 +06 27 14           ~ 249 2
20 ACO 3391 ClG 06 26 15.4 -53 40 52           ~ 202 1
21 ACO 644 ClG 08 17 24.5 -07 30 46           ~ 225 0
22 NGC 2563 GiG 08 20 35.6870161656 +21 04 04.111020012   13.7 12.39     ~ 154 1
23 ACO 665 ClG 08 30 45.2 +65 52 55           ~ 437 0
24 ACO 780 ClG 09 18 30 -12 15.7           ~ 453 0
25 ACO 779 ClG 09 20 02.70 +33 45 29.7           ~ 253 0
26 NGC 3258 EmG 10 28 53.588 -35 36 19.98   12.50 11.72 10.86   ~ 187 0
27 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 839 1
28 HCG 51 CGG 11 22 21.6 +24 19 41   14.9       ~ 83 0
29 NAME NGC 4073 Group GrG 12 04 44.08 +01 48 40.9     13.53     ~ 280 0
30 NAME NGC 4104 Group GrG 12 06 19.75 +28 07 08.3           ~ 46 0
31 NGC 4325 BiC 12 23 06.662 +10 37 16.45   15.0       ~ 128 1
32 BAX 185.7731+10.6201 ClG 12 23 06.7 +10 37 15           ~ 47 0
33 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7190 3
34 HCG 62 CGG 12 53 05.6 -09 12 21           ~ 306 0
35 ACO 1650 ClG 12 58 42.0 -01 45 45           ~ 304 0
36 ACO 1651 ClG 12 59 22.43 -04 11 47.1           ~ 290 0
37 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1125 0
38 NGC 5044 BiC 13 15 23.9607836592 -16 23 07.547751744   11.9   10.74   ~ 501 0
39 NGC 5129 LIN 13 24 10.0256041224 +13 58 35.575742748   13.3       ~ 127 1
40 BAX 201.0418+13.9765 ClG 13 24 11.9 +13 58 45           ~ 85 0
41 ACO 3558 ClG 13 27 54.8 -31 29 32           ~ 442 2
42 IC 4296 AGN 13 36 39.03253319 -33 57 57.0730368   11.52 12.99 10.00 10.79 ~ 494 2
43 ACO 3571 ClG 13 47 28.9 -32 51 57           ~ 284 2
44 ACO 1795 ClG 13 48 50.48 +26 35 07.4           ~ 1267 0
45 HCG 68 CGG 13 53 40.9 +40 19 07     12.4     ~ 113 0
46 3C 295 Sy2 14 11 20.6 +52 12 09   22.34 20.80 18.54   ~ 979 5
47 NGC 5846 BiC 15 06 29.253 +01 36 20.29   11.9   9.74   ~ 849 1
48 ACO 2029 ClG 15 10 56.2 +05 44 42           ~ 943 0
49 ACO 2052 ClG 15 16 41.64 +07 01 45.5           ~ 730 1
50 ACT-CL J1521.8+0742 ClG 15 21 55.14 +07 41 27.2     15.13     ~ 311 0
51 ACO 2063 ClG 15 23 01.8 +08 38 22           ~ 397 2
52 BAX 233.1222+04.6817 ClG 15 32 32.02 +04 40 51.6     15.13     ~ 61 0
53 ACO 2142 ClG 15 58 14.38 +27 12 57.8           ~ 768 0
54 AWM 4 ClG 16 04 52.01 +23 56 26.9     14.38     ~ 130 0
55 ACO 2163 ClG 16 15 46.1 -06 08 50           ~ 562 0
56 ACO 2199 ClG 16 28 43.31 +39 34 07.6           ~ 1171 1
57 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 809 1
58 BAX 249.5848-64.5165 ClG 16 38 16.1 -64 20 50           ~ 115 0
59 ACO 2256 ClG 17 03 09.4 +78 39 36           ~ 885 1
60 NGC 6329 GiG 17 14 15.0278110392 +43 41 04.900781508   14.3       ~ 39 1
61 NGC 6338 Bla 17 15 22.9752 +57 24 40.312   14.2   8   ~ 184 2
62 NGC 6482 GiG 17 51 48.8339247888 +23 04 18.889271112 12.71 12.35 11.45     ~ 208 1
63 ACO 2319 ClG 19 20 45.3 +43 57 43           ~ 461 1
64 BAX 349.3187+18.7197 ClG 23 17 11.184 +18 41 48.87           ~ 91 0
65 ACO 2597 ClG 23 25 19.70 -12 07 27.7           ~ 539 0
66 ACO 2634 ClG 23 38 18.4 +27 01 37           ~ 503 2
67 ACO 2657 ClG 23 44 51.0 +09 08 40           ~ 269 3
68 HCG 97 CGG 23 47 24.0 -02 19 08           ~ 99 0
69 ACO 4038 ClG 23 47 31.1 -28 12 10           ~ 335 3
70 ACO 2670 ClG 23 54 10.51 -10 23 06.8           ~ 352 0
71 ACO 4059 ClG 23 57 02.2 -34 45 58           ~ 380 1

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