2004A&A...416..441P

Query : 2004A&A...416..441P

2004A&A...416..441P - Astronomy and Astrophysics, volume 416441-446 (2004/3-3)

On the Lx-σv relation of groups of galaxies.

PLIONIS M. and TOVMASSIAN H.M.

Abstract (from CDS):

We analyse the Lx-σv relation for the new Mulchaey et al. group Atlas. We find that once we take into account the possible statistical bias introduced by the cutoff in luminosity, we recover a relation that is consistent with that of clusters, i.e., Lx ∝σ4.1. The larger scatter of this relation for groups of galaxies could be attributed to an orientation effect, due to which the radial velocity dispersion of groups oriented close to orthogonal to the line of sight, would be underestimated. This effect could also contribute to flattening the slope of the group Lx-σv relation.

Abstract Copyright: ∼

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

Simbad objects: 44

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Number of rows : 44
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 NAME NGC 326 Group GrG 00 58 22.3 +26 52 04           ~ 6 0
2 NAME PSC CL ClG 00 58 25.0 +30 39 11           ~ 131 1
3 NAME NGC 524 Group GrG 01 24 01.6 +09 27 37   11.2       ~ 34 0
4 HCG 12 CGG 01 27 33.7 -04 40 14           ~ 40 0
5 NAME NGC 720 Group GrG 01 52 57.5 -13 30 20           ~ 15 0
6 HCG 15 CGG 02 07 39.0 +02 08 18           ~ 75 0
7 NAME UGC 1651 Group GrG 02 09 38.2 +35 47 50           ~ 2 0
8 HCG 16 CGG 02 09 40.82 -10 11 02.0           ~ 175 0
9 NAME NGC 1044 Group GrG 02 41 06.3 +08 44 18           ~ 3 0
10 NAME IC 1880 Group ClG 03 06 28.4 -09 43 42           ~ 5 0
11 NAME UGC 2775 Group GrG 03 23 00 +41 20.4           ~ 2 0
12 NAME NGC 1400 Group GrG 03 32 16.00 -18 33 54.0           ~ 75 0
13 NAME NGC 1587 Group GrG 04 30 46.1 +00 24 25   12.1       ~ 21 0
14 NAME NGC 2300 Group GrG 07 32 22.84 +85 42 26.3           ~ 59 0
15 NGC 2484 Sy2 07 58 28.10812817 +37 47 11.8076475   14.15 14.9     ~ 284 1
16 HCG 37 CGG 09 13 35.6 +30 00 51           ~ 65 0
17 HCG 48 CGG 10 37 45.6 -27 04 50           ~ 58 0
18 ZwCl 154-41 ClG 10 43 18.7 +31 31 07           ~ 2 2
19 NAME NGC 3607 Group GrG 11 17 55.9 +18 07 35   9.9       ~ 57 0
20 MCXC J1121.7+0249 ClG 11 21 45.90 +02 50 00.7           ~ 21 0
21 NAME NGC 3665 Group GrG 11 23 30.6 +38 43 31   11.2       ~ 26 1
22 HCG 57 CGG 11 37 50.5 +21 59 06     15.4     ~ 87 1
23 NAME NGC 3923 Group GrG 11 51 01.6 -28 48 20           ~ 15 0
24 NAME NGC 4065 Group GrG 12 04 04.94 +20 14 48.4   12.2       ~ 29 0
25 NAME NGC 4104 Group GrG 12 06 19.75 +28 07 08.3           ~ 52 0
26 NAME NGC 4125 GrG GrG 12 08 06.6 +65 10 29           ~ 15 0
27 Shk 202 GrG 12 19.6 +28 23           ~ 13 0
28 NAME NGC 4261 Group GrG 12 20 02.3 +05 20 24     12.9     ~ 43 0
29 NAME NGC 4636 Group GrG 12 42 49.5 +02 41 08           ~ 570 0
30 NAME NGC 5044 Group GrG 13 14 22.7 -16 32 04           ~ 186 0
31 NAME NGC 5171 Group GrG 13 29 05.10 +11 45 04.8     4.7     ~ 78 0
32 NAME NGC 5322 Group GrG 13 46 42.25 +60 21 53.2   10.3       ~ 29 0
33 HCG 67 CGG 13 49 03.5 -07 12 20           ~ 53 0
34 HCG 68 CGG 13 53 40.9 +40 19 07     12.4     ~ 114 0
35 NAME Arp 330 Group GrG 16 49 11.8 +53 25 12           ~ 9 0
36 NAME NGC 6338 Group GrG 17 15 32.47 +57 25 19.0           ~ 95 0
37 HCG 90 CGG 22 02 06.3 -31 55 48           ~ 133 0
38 NAME UGC 12064 Group GrG 22 31 30.76 +39 21 03.5           ~ 11 0
39 NAME Stephan's Quintet CGG 22 35 57.5 +33 57 36           ~ 480 1
40 NAME IC 1459 Group GrG 22 57 16 -36 25.4           ~ 37 0
41 NAME NGC 7619 Group GrG 23 20 32.1 +08 22 26           ~ 48 0
42 HCG 97 CGG 23 47 24.0 -02 19 08           ~ 102 0
43 NAME NGC 7777 Group GrG 23 53 33.0 +28 34 42           ~ 12 0
44 NAME NGC 4291 Group GrG ~ ~           ~ 2 0

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