1994A&A...284L..31S

Query : 1994A&A...284L..31S

1994A&A...284L..31S - Astronomy and Astrophysics, volume 284L31-34 (1994/4-3)

A Faber-Jackson relation for clusters of galaxies: implications for modified dynamics.

SANDERS R.H.

Abstract (from CDS):

In a sample of 20 rich clusters of galaxies, the mass of the hot X-ray emitting gas is correlated with the square of the gas temperature. Because the hot intra-cluster gas comprises most of the baryonic mass in rich clusters, this correlation implies a mass-velocity dispersion relation of the form seen in elliptical galaxies- the Faber-Jackson relation. Indeed, within the errors and uncertainty in the Hubble parameter, clusters appear to lie on the high mass extention of the Faber-Jackson relation for ellipticals. Although this result is difficult to understand in terms of conventional scenarios for structure formation, it is a direct consequence of Milgrom's modified dynamics (MOND). Applying Milgrom's mass-temperature relation for isothermal spheres to this sample of clusters, one finds agreement between the predicted and observed gas masses to within a factor of two.

Abstract Copyright: ∼

Journal keyword(s): galaxies: clustering - X-rays: clusters of galaxies - dark matter

Simbad objects: 20

goto View the references in ADS

Number of rows : 20
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ACO 85 ClG 00 41 36.21 -09 19 30.4           ~ 974 0
2 ACO 168 ClG 01 15 07.58 +00 19 10.8           ~ 379 2
3 ACO 194 ClG 01 26 01.3 -01 22 02           ~ 363 2
4 ACO 262 ClG 01 52 50.4 +36 08 46           ~ 727 1
5 ACO 400 ClG 02 57 37.4 +06 00 45           ~ 408 3
6 ACO 399 ClG 02 57 56.4 +13 00 59           ~ 420 0
7 ACO 426 ClG 03 19 47.6 +41 30 54           ~ 2508 1
8 ACO 576 ClG 07 21 24.1 +55 44 20           ~ 312 1
9 MCG-02-24-007 LIN 09 18 05.66848602 -12 05 43.8060823   14.38 14.8     ~ 1077 1
10 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 905 1
11 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 1127 1
12 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
13 ACO 1795 ClG 13 48 47.4 +26 34 55           ~ 1330 0
14 ACO 2029 ClG 15 10 54.2 +05 44 23           ~ 1020 0
15 ACO 2063 ClG 15 23 01.8 +08 38 22           ~ 414 2
16 ACO 2199 ClG 16 28 34.5 +39 32 26           ~ 1206 1
17 ACO 2256 ClG 17 03 37.5 +78 37 23           ~ 928 1
18 ACO 2319 ClG 19 21 14.0 +43 56 57           ~ 495 1
19 ACO 2634 ClG 23 38 18.4 +27 01 37           ~ 515 2
20 ACO 2657 ClG 23 44 51.0 +09 08 40           ~ 280 3

To bookmark this query, right click on this link: simbad:objects in 1994A&A...284L..31S and select 'bookmark this link' or equivalent in the popup menu