other query modes : |
Identifier query |
Coordinate query |
Criteria query |
Reference query |
Basic query |
Script submission |
TAP |
Output options |
Object types |
Help |
Query : 1999MNRAS.305..834E |
1999MNRAS.305..834E - Mon. Not. R. Astron. Soc., 305, 834-848 (1999/June-1)
ROSAT PSPC observations of 36 high-luminosity clusters of galaxies: constraints on the gas fraction.
ETTORI S. and FABIAN A.C.
Abstract (from CDS):
Applying robust estimators, we find that the gas fraction within r500 of the clusters in our sample has a distribution centred on fgas(r500)=0.168 h50–1.5. The gas fraction ranges from 0.101 to 0.245 at the 95 per cent confidence level. The values of fgas show highly significant variations between individual clusters, which may be explained if the dark matter has a significant baryonic component. Within a cluster, the average radial dependence of the gas mass fraction increases outward as rs, with s∼0.20. Combining these results with those of primordial nucleosynthesis calculations and the current estimate of H0, the above central location implies Ω0,m0.56 at the 95 per cent confidence level. This upper limit decreases to 0.34 if we take the highest significant estimates for fgas.
A significant decrease in cluster gas fraction with redshift from the local value, fgas,0, of 0.21, found assuming Ω0,m=1, is also reduced if Ω0,m is low.
Abstract Copyright: 1999, Royal Astronomical Society
Journal keyword(s): galaxies: clusters: general - galaxies: fundamental parameters - intergalactic medium - cosmology: observations - dark matter - X-rays: galaxies
CDS comments: IRAS 09104 = ClG 0910.4+4109
Simbad objects: 43
Number of rows : 43 |
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 2744 | ClG | 00 14 20.03 | -30 23 17.8 | ~ | 813 | 0 | |||||
2 | 2A 0251+413 | ClG | 02 54 32.2 | +41 35 10 | ~ | 315 | 1 | |||||
3 | ACO 401 | ClG | 02 58 56.9 | +13 34 56 | ~ | 566 | 0 | |||||
4 | ACO 3112 | ClG | 03 17 52.4 | -44 14 35 | ~ | 311 | 1 | |||||
5 | ACO 478 | ClG | 04 13 20.7 | +10 28 35 | ~ | 502 | 0 | |||||
6 | ACO 483 | ClG | 04 16 03 | -11 31.6 | ~ | 22 | 0 | |||||
7 | ACO 3266 | ClG | 04 31 11.9 | -61 24 23 | ~ | 410 | 0 | |||||
8 | ACO 520 | ClG | 04 54 10.1 | +02 55 38 | ~ | 436 | 0 | |||||
9 | ACO 545 | ClG | 05 32 24.4152 | -11 32 35.080 | ~ | 97 | 0 | |||||
10 | ACO 586 | ClG | 07 32 20.3 | +31 37 58 | ~ | 180 | 0 | |||||
11 | ClG 0745-19 | ClG | 07 47 31.3 | -19 17 40 | ~ | 372 | 0 | |||||
12 | 2MASX J07473129-1917403 | BiC | 07 47 31.3247085936 | -19 17 40.013334276 | 19.60 | ~ | 409 | 1 | ||||
13 | ACO 644 | ClG | 08 17 24.5 | -07 30 46 | ~ | 225 | 0 | |||||
14 | ACO 665 | ClG | 08 30 45.2 | +65 52 55 | ~ | 437 | 0 | |||||
15 | ACO 754 | ClG | 09 09 08.4 | -09 39 58 | ~ | 666 | 1 | |||||
16 | ClG 0910.4+4109 | ClG | 09 13 46.0 | +40 56 20 | ~ | 65 | 2 | |||||
17 | ZwCl 1021+0426 | ClG | 10 23 39.0 | +04 11 14 | 15.6 | 17.95 | ~ | 283 | 0 | |||
18 | NAME Hydra I Cluster | ClG | 10 36 36.0 | -27 31 04 | ~ | 840 | 1 | |||||
19 | ACO 1068 | ClG | 10 40 47.1 | +39 57 19 | ~ | 214 | 0 | |||||
20 | ACO 1413 | ClG | 11 55 12.87 | +23 23 46.9 | ~ | 430 | 0 | |||||
21 | ACO 1651 | ClG | 12 59 22.43 | -04 11 47.1 | ~ | 290 | 0 | |||||
22 | ACO 1656 | ClG | 12 59 44.40 | +27 54 44.9 | ~ | 4803 | 2 | |||||
23 | ACO 1689 | ClG | 13 11 29.5 | -01 20 28 | ~ | 1125 | 0 | |||||
24 | ACO 1763 | ClG | 13 35 20.1 | +41 00 04 | ~ | 312 | 0 | |||||
25 | ACO 1795 | ClG | 13 48 50.48 | +26 35 07.4 | ~ | 1267 | 0 | |||||
26 | ZwCl 1358+6245 | ClG | 13 59 54.3 | +62 30 36 | 18.5 | ~ | 361 | 0 | ||||
27 | ACO 1835 | ClG | 14 01 02.07 | +02 52 43.2 | ~ | 689 | 1 | |||||
28 | ACO 2029 | ClG | 15 10 56.2 | +05 44 42 | ~ | 943 | 0 | |||||
29 | ACO 2142 | ClG | 15 58 14.38 | +27 12 57.8 | ~ | 768 | 0 | |||||
30 | ACO 2163 | ClG | 16 15 46.1 | -06 08 50 | ~ | 563 | 0 | |||||
31 | ACO 2204 | ClG | 16 32 45.7 | +05 34 43 | ~ | 436 | 0 | |||||
32 | ACO 2218 | ClG | 16 35 54.0 | +66 13 00 | ~ | 809 | 1 | |||||
33 | BAX 249.5848-64.5165 | ClG | 16 38 16.1 | -64 20 50 | ~ | 115 | 0 | |||||
34 | ACO 2219 | ClG | 16 40 22.1 | +46 42 20 | ~ | 359 | 0 | |||||
35 | ACO 2244 | ClG | 17 02 40.33 | +34 02 58.7 | ~ | 281 | 0 | |||||
36 | ACO 2256 | ClG | 17 03 09.4 | +78 39 36 | ~ | 885 | 1 | |||||
37 | ACO 2255 | ClG | 17 12 50.04 | +64 03 10.6 | ~ | 568 | 0 | |||||
38 | ACO 2319 | ClG | 19 20 45.3 | +43 57 43 | ~ | 461 | 1 | |||||
39 | NAME Cyg A | Sy2 | 19 59 28.35656837 | +40 44 02.0972325 | 16.22 | 15.10 | ~ | 2368 | 2 | |||
40 | ACO 3667 | ClG | 20 12 33.68 | -56 50 26.3 | ~ | 627 | 1 | |||||
41 | ClG 2137-2353 | ClG | 21 40 12.8 | -23 39 27 | 18.5 | ~ | 378 | 0 | ||||
42 | ACO 2390 | ClG | 21 53 37.4 | +17 41 46 | ~ | 688 | 2 | |||||
43 | ACO 2507 | ClG | 22 57 06.1 | +05 33 49 | ~ | 37 | 0 |
To bookmark this query, right click on this link: simbad:objects in 1999MNRAS.305..834E and select 'bookmark this link' or equivalent in the popup menu