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Query : 2000MNRAS.315..689L |
2000MNRAS.315..689L - Mon. Not. R. Astron. Soc., 315, 689-702 (2000/July-2)
The entropy and energy of intergalactic gas in galaxy clusters.
LLOYD-DAVIES E.J., PONMAN T.J. and CANNON D.B.
Abstract (from CDS):
We determine the energy associated with this entropy floor, by studying the net reduction in binding energy of the gas in low-mass systems, and find that it corresponds to a pre-heating temperature of ∼0.3keV. Since the relationship between entropy and energy injection depends upon gas density, we are able to combine the excesses of 70-140keV.cm2 and 0.3keV to derive the typical electron density of the gas into which the energy was injected. The resulting value of {formmu2} implies that the heating must have happened prior to cluster collapse but after a redshift z∼7-10. The energy requirement is well matched to the energy from supernova explosions responsible for the metals which now pollute the intracluster gas.
Abstract Copyright: Blackwell Science Ltd
Journal keyword(s): galaxies: clusters: general - intergalactic medium - X-rays: general
Simbad objects: 22
Number of rows : 22 |
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 | NAME NGC 383 Group | GrG | 01 07 27.7 | +32 23 59 | 11.1 | 14.1 | ~ | 82 | 0 | |||
2 | ZwCl 0120+3300 | ClG | 01 23 36.9 | +33 15 03 | ~ | 78 | 0 | |||||
3 | NGC 507 | BiC | 01 23 39.950 | +33 15 22.22 | 13.0 | ~ | 440 | 3 | ||||
4 | ACO 262 | ClG | 01 52 50.4 | +36 08 46 | ~ | 699 | 1 | |||||
5 | 2A 0251+413 | ClG | 02 54 32.2 | +41 35 10 | ~ | 315 | 1 | |||||
6 | ACO 400 | ClG | 02 57 37.4 | +06 00 45 | ~ | 399 | 3 | |||||
7 | ACO 478 | ClG | 04 13 20.7 | +10 28 35 | ~ | 502 | 0 | |||||
8 | ACO 496 | ClG | 04 33 38.8 | -13 15 59 | ~ | 694 | 2 | |||||
9 | ACO 665 | ClG | 08 30 45.2 | +65 52 55 | ~ | 437 | 0 | |||||
10 | ACO 780 | ClG | 09 18 30 | -12 15.7 | ~ | 453 | 0 | |||||
11 | NAME Hydra I Cluster | ClG | 10 36 36.0 | -27 31 04 | ~ | 840 | 1 | |||||
12 | HCG 62 | CGG | 12 53 05.6 | -09 12 21 | ~ | 306 | 0 | |||||
13 | ACO 1689 | ClG | 13 11 29.5 | -01 20 28 | ~ | 1125 | 0 | |||||
14 | NAME NGC 5044 Group | GrG | 13 14 22.7 | -16 32 04 | ~ | 181 | 0 | |||||
15 | ACO 1795 | ClG | 13 48 50.48 | +26 35 07.4 | ~ | 1267 | 0 | |||||
16 | HCG 68 | CGG | 13 53 40.9 | +40 19 07 | 12.4 | ~ | 113 | 0 | ||||
17 | ACT-CL J1521.8+0742 | ClG | 15 21 55.14 | +07 41 27.2 | 15.13 | ~ | 311 | 0 | ||||
18 | ACO 2163 | ClG | 16 15 46.1 | -06 08 50 | ~ | 563 | 0 | |||||
19 | ACO 2199 | ClG | 16 28 43.31 | +39 34 07.6 | ~ | 1171 | 1 | |||||
20 | ACO 2218 | ClG | 16 35 54.0 | +66 13 00 | ~ | 809 | 1 | |||||
21 | HD 226868 | HXB | 19 58 21.6757355952 | +35 12 05.784512688 | 9.38 | 9.72 | 8.91 | 8.42 | O9.7Iabpvar | 4337 | 0 | |
22 | HCG 97 | CGG | 23 47 24.0 | -02 19 08 | ~ | 99 | 0 |
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