2000ApJ...530...62G

Query : 2000ApJ...530...62G

2000ApJ...530...62G - Astrophys. J., 530, 62-79 (2000/February-2)

Optical luminosities and mass-to-light ratios of nearby galaxy clusters.

GIRARDI M., BORGANI S., GIURICIN G., MARDIROSSIAN F. and MEZZETTI M.

Abstract (from CDS):

We analyze a sample of 105 clusters having virial mass homogeneously estimated and for which galaxy magnitudes are available with a well-defined high degree of completeness. In particular, we consider a subsample of 89 clusters with B_j-band galaxy magnitudes taken from the COSMOS/UKST Southern Sky Object Catalog. After suitable magnitude corrections and uniform conversions to B_j band, we compute cluster luminosities L_Bj within several clustercentric distances, 0.5, 1.0, 1.5 h^–1 Mpc and within the virialization radius R_vir. In particular, we use the luminosity function and background counts estimated by Lumsden et al. on the Edinburgh/Durham Southern Galaxy Catalog, which is the well-calibrated part of the COSMOS catalog. We analyze the effect of several uncertainties connected to photometric data, fore/background removal, and extrapolation below the completeness limit of the photometry, in order to assess the robustness of our cluster luminosity estimates. We draw our results on the relations between luminosity and dynamical quantities from the COSMOS sample by considering mass and luminosities determined within the virialization radius. We find a very good correlation between cluster luminosity, L_Bj, and galaxy velocity dispersion, σ_v, with L_Bj∝σ^2.1–2.3_v. Our estimate of the typical value for the mass-to-light ratio is M/L_Bj∼250 h M_☉/L_☉. We do not find any correlation of M/L_Bj with cluster morphologies, i.e., Rood-Sastry and Bautz-Morgan types, and only a weak significant correlation with cluster richness. We find that mass has a slight, but significant, tendency to increase faster than the luminosity does, M∝L^1.2–1.3_Bj. We verify the robustness of this relation against a number of possible systematics. We verify that this increasing trend of M/L with cluster mass cannot be entirely due to a higher spiral fraction in poorer clusters, thus suggesting that a similar result would also be found by using R-band galaxy magnitudes.

Abstract Copyright: ∼

Journal keyword(s): Cosmology: Observations - Galaxies: Clusters: General - Galaxies: Fundamental Parameters - Galaxies: Photometry

Simbad objects: 108

Full paper

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Number of rows : 108

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag V	Sp type	#ref 1850 - 2026	#notes
1	ACO 2717	ClG	00 03 12.9	-35 56 13		~	146	0
2	ACO 2715	ClG	00 03 20.67	-34 26 59.3		~	28	0
3	DRCG 0003-50	ClG	00 05 43.1	-50 06 53		~	27	1
4	ACO 2721	ClG	00 05 57.0	-34 43 09		~	99	0
5	ACO 2734	ClG	00 11 21.60	-28 51 16.6		~	156	0
6	ACO 2755	ClG	00 17 41.14	-35 12 01.0		~	42	1
7	ACO 2799	ClG	00 37 28.1	-39 08 59		~	40	0
8	ACO 2798	ClG	00 37 32.80	-28 32 00.5		~	30	0
9	ACO 2800	ClG	00 37 58	-25 05.5		~	41	0
10	ACO 85	ClG	00 41 36.21	-09 19 30.4		~	974	0
11	ACO S 84	ClG	00 49 23.2	-29 31 33		~	89	0
12	ACO 119	ClG	00 56 08.57	-01 12 00.8		~	577	2
13	ACO 2877	ClG	01 09 49.3	-45 54 02		~	160	2
14	ACO 194	ClG	01 26 01.3	-01 22 02		~	363	2
15	ACO 2911	ClG	01 26 12.9	-37 56 22		~	63	0
16	ACO 229	ClG	01 39 25	-03 37.8		~	25	0
17	ACO 256	ClG	01 47 37	-03 51.1		~	22	0
18	ACO 295	ClG	02 02 27	-01 04.6		~	67	0
19	2A 0251+413	ClG	02 54 26.6	+41 33 25		~	328	1
20	ACO 420	ClG	03 09 17	-11 31.6		~	25	0
21	ACO 3093	ClG	03 10 52.0	-47 23 43		~	34	0
22	ACO 3094	ClG	03 11 25.00	-26 55 52.2		~	64	0
23	ACO 3111	ClG	03 17 49.3	-45 42 24		~	38	0
24	ACO 426	ClG	03 19 47.6	+41 30 54		~	2508	1
25	ACO 3122	ClG	03 22 10.9	-41 20 15		~	62	0
26	ACO 3126	ClG	03 28 43.7	-55 42 44		~	64	0
27	ACO 3128	ClG	03 29 50.6	-52 34 48		~	183	3
28	ACO 3142	ClG	03 36 42	-39 48.2		~	42	0
29	ACO S 373	ClG	03 38 29.4	-35 27 08		~	2029	0
30	NAME Eridanus ClG	GrG	03 38 32.00	-22 18 51.0		~	200	0
31	ACO 3151	ClG	03 40 27.2	-28 40 20		~	45	0
32	ACO 3158	ClG	03 43 07.5	-53 38 09		~	327	0
33	ACO 458	ClG	03 45 50.6	-24 16 42		~	56	0
34	ACO 3194	ClG	03 59 12	-30 10.5		~	28	0
35	ACO 3223	ClG	04 08 34.5	-30 49 08		~	59	2
36	ACO S 463	ClG	04 29 13.4	-53 44 02		~	50	0
37	ACO 3266	ClG	04 31 26.4	-61 25 17		~	447	0
38	ACO 496	ClG	04 33 40.8	-13 14 34		~	728	2
39	ACO 514	ClG	04 48 18	-20 28.7		~	149	0
40	ACO 524	ClG	04 57.8	-19 43		~	25	0
41	ACO 539	ClG	05 16 35.1	+06 27 14		~	255	2
42	ACO 3334	ClG	05 17 58	-58 32.9		~	20	0
43	ACO 3354	ClG	05 34 39	-28 30.1		~	22	0
44	ACO 3360	ClG	05 40 18.8	-43 23 31		~	29	0
45	ACO 3376	ClG	06 01 25.000	-39 59 51.00		~	334	0
46	ACO 3381	ClG	06 09.9	-33 36		~	75	2
47	ACO 3391	ClG	06 26 15.4	-53 40 52		~	222	1
48	ACO 3395	ClG	06 27 31.1	-54 23 58		~	229	0
49	ACO 576	ClG	07 21 24.1	+55 44 20		~	312	1
50	ACO 754	ClG	09 09 14.8	-09 40 35		~	695	1
51	AWM 1	ClG	09 17 13.4	+20 02 44	14.02	~	32	0
52	NAME NGC 3090 Group	GrG	10 00 37.93	-02 57 45.3	13.88	~	46	0
53	ACO 978	ClG	10 20 26.66	-06 31 37.5		~	126	1
54	NAME Hydra I Cluster	ClG	10 36 36.0	-27 31 04		~	905	1
55	ACO 1069	ClG	10 39 54.3	-08 36 40		~	116	1
56	ACO 1146	ClG	11 01 20.6	-22 43 08		~	104	0
57	ACO 1314	ClG	11 34 53.0	+49 05 18		~	234	1
58	NAME NGC 4073 Group	GrG	12 04 44.08	+01 48 40.9	13.53	~	292	0
59	NAME Virgo Cluster	ClG	12 30 47.8	+12 23 07		~	7107	0
60	ACO 1631	ClG	12 52 50.6	-15 25 37		~	176	1
61	ACO 1644	ClG	12 57 11.6	-17 24 34		~	391	1
62	ACO 3532	ClG	12 57 19.2	-30 22 13		~	185	2
63	ACO 1656	ClG	12 59 44.40	+27 54 44.9		~	5141	2
64	ACO S 721	ClG	13 06 06	-37 35.0		~	16	0
65	ACO 3556	ClG	13 24 06.2	-31 39 38		~	159	0
66	ACO 3558	ClG	13 28 03.2	-31 31 35		~	476	2
67	ACO 3559	ClG	13 29 53.9	-29 31 29		~	74	0
68	BAX 202.9000-31.8128	ClG	13 31 28.8	-31 49 40		~	88	1
69	ACO 3562	ClG	13 33 31.8	-31 40 23		~	337	1
70	ACO 3571	ClG	13 47 32.4	-32 50 12		~	308	2
71	NAME IC 4329 Group	GrG	13 48 36.4	-30 30 13		~	147	2
72	ACO S 753	ClG	14 03 35.9	-33 59 16		~	91	1
73	NAME Ursa Major Cluster	ClG	15 08.8	+67 07		~	424	1
74	ACO 2040	ClG	15 12 44.00	+07 27 34.5		~	144	1
75	AWM 4	ClG	16 04 52.01	+23 56 26.9	14.38	~	141	0
76	ACO 2151	ClG	16 05 15.0	+17 44 55		~	594	3
77	ACO 2197	ClG	16 27 48.01	+40 58 04.5		~	290	0
78	ACO 2256	ClG	17 03 37.5	+78 37 23		~	928	1
79	ACO S 805	ClG	18 47 14.4	-63 19 45		~	137	3
80	ACO 3651	ClG	19 52 10.9	-55 05 16		~	74	0
81	ACO 3667	ClG	20 12 33.68	-56 50 26.3		~	676	1
82	ACO 3693	ClG	20 34 22.0	-34 29 40		~	46	0
83	ACO 3695	ClG	20 34 47.7	-35 49 39		~	96	2
84	ACO 3705	ClG	20 41 47.1	-35 10 30		~	47	0
85	ACO 3733	ClG	21 01 50.0	-28 06 54		~	64	3
86	ACO 3744	ClG	21 07 13.8	-25 28 54		~	80	1
87	ACO 2353	ClG	21 34 22.1	-01 34 33		~	27	0
88	ACO 2362	ClG	21 40 43	-14 16.3		~	37	0
89	ACO 3809	ClG	21 46 57.5	-43 54 06		~	99	0
90	ACO 3822	ClG	21 54 06.2	-57 50 49		~	98	0
91	ACO 3825	ClG	21 58 22.4	-60 23 39		~	66	0
92	ACO 2401	ClG	21 58 22.6	-20 06 13		~	71	0
93	ACO S 987	ClG	22 02 23.5	-22 30 15		~	27	0
94	ACO 2426	ClG	22 14 27.3	-10 22 05		~	91	0
95	ACO 3879	ClG	22 27.8	-69 02		~	29	0
96	ACO 3880	ClG	22 27 49.5	-30 34 40		~	104	2
97	ACO 3921	ClG	22 49 59.0	-64 25 48		~	165	1
98	ACO 2500	ClG	22 53 46.37	-25 30 00.0		~	24	0
99	ACO 2554	ClG	23 12 18.7	-21 30 54		~	100	1
100	ACO 2569	ClG	23 17 54	-12 51.6		~	31	0
101	ACO 2593	ClG	23 24 27.15	+14 33 40.2		~	231	0
102	ACO 4008	ClG	23 30 17	-39 19.4		~	26	0
103	ACO 4010	ClG	23 31 10.3	-36 30 26		~	63	0
104	ACO 2644	ClG	23 41 05	+00 05.3		~	41	0
105	ACO S 1157	ClG	23 51 33.684	-34 25 33.64		~	10	0
106	ACO 2670	ClG	23 54 10.51	-10 23 06.8		~	364	0
107	ACO 4053	ClG	23 54 45.43	-27 40 52.6		~	39	0
108	ACO 4067	ClG	23 58 49.9	-60 37 25		~	55	0

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