2006AJ....132..514C

Query : 2006AJ....132..514C

2006AJ....132..514C - Astron. J., 132, 514-520 (2006/August-0)

Velocity dispersion, mass, and the luminosity function of the fossil cluster RX J1416.4+2315.

CYPRIANO E.S., MENDES DE OLIVEIRA C.L. and SODRE L.Jr

Abstract (from CDS):

We study the properties of the fossil cluster RX J1416.4+2315 through g'- and i'-band imaging and spectroscopy of 25 member galaxies. The system is at a mean redshift of 0.137 and has a velocity dispersion of 584 km.s–1. Superposed onto one quadrant of the cluster field is a group of five galaxies at a mean redshift of 0.131, which, if included as part of the cluster, increases the velocity dispersion to 846 km.s–1. The central object of RX J1416.4+2315 is a normal elliptical galaxy with no cD envelope. The luminosity function of the system, estimated by the number counts and statistical background correction in the range -22.6<Mg'←16.6, is well fitted by a Schechter function with M*g'=-21.2±0.8 and α=-1.2±0.2 (H0=70 km.s–1.Mpc–1, ΩM=0.3, ΩΛ=0.7). The luminosity function obtained from the spectroscopically confirmed members in both the g' and i' bands agrees with the photometric results. The mass of the system, M∼1.9x1014 h–170M☉, its M/L of 445 h70M☉L–1B☉, and LXof 11x1043 h–270 ergs.s–1 (bolometric) suggest that this system is the second example of a known fossil cluster, after RX J1552.2+2013, confirmed in the literature.

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Journal keyword(s): Cosmology: Observations - galaxies: clusters: individual (RX J1416.4+2315) - Galaxies: Elliptical and Lenticular, cD - Galaxies: Evolution - Galaxies: Kinematics and Dynamics - Galaxies: Luminosity Function, Mass Function

VizieR on-line data: <Available at CDS (J/AJ/132/514): table1.dat>

Nomenclature: Table 1: [CMS2006] GSS.s+MMSS N=54.

Simbad objects: 60

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Number of rows : 60
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 BAX 043.2159-01.2747 ClG 02 52 49.4 -01 16 27           ~ 104 0
2 NGC 1132 EmG 02 52 51.82 -01 16 29.0   13.9   12.16   ~ 180 0
3 PG 1323-086 HS* 13 25 39.4669501176 -08 49 19.067387484 12.660 13.341 13.481 13.529 13.608 sdB3IHe8 144 1
4 BAX 205.1392+40.2967 ClG 13 40 33.4 +40 17 48           ~ 45 1
5 [CMS2006] G17.0+1547 G 14 16 17.0 +23 15 47           ~ 1 0
6 [CMS2006] G17.2+1455 G 14 16 17.2 +23 14 55           ~ 1 0
7 [CMS2006] G17.9+1340 G 14 16 17.9 +23 13 40           ~ 1 0
8 [CMS2006] G17.9+1624 G 14 16 17.9 +23 16 24           ~ 1 0
9 [CMS2006] G18.5+1251 G 14 16 18.5 +23 12 51           ~ 1 0
10 [CMS2006] G20.6+1517 G 14 16 20.6 +23 15 17           ~ 1 0
11 [CMS2006] G20.9+1605 G 14 16 20.9 +23 16 05           ~ 1 0
12 [CMS2006] G21.0+1711 G 14 16 21.0 +23 17 11           ~ 1 0
13 [CMS2006] G21.2+1722 G 14 16 21.2 +23 17 22           ~ 1 0
14 [CMS2006] G21.3+1724 G 14 16 21.3 +23 17 24           ~ 1 0
15 [CMS2006] G21.4+1625 G 14 16 21.4 +23 16 25           ~ 1 0
16 [CMS2006] G21.7+1407 G 14 16 21.7 +23 14 07           ~ 1 0
17 [CMS2006] G22.1+1452 G 14 16 22.1 +23 14 52           ~ 1 0
18 [CMS2006] G22.3+1729 G 14 16 22.3 +23 17 29           ~ 1 0
19 [CMS2006] G22.7+1321 G 14 16 22.7 +23 13 21           ~ 1 0
20 [CMS2006] G23.9+1512 G 14 16 23.9 +23 15 12           ~ 1 0
21 [CMS2006] G24.0+1332 G 14 16 24.0 +23 13 32           ~ 1 0
22 [CMS2006] G24.0+1519 G 14 16 24.0 +23 15 19           ~ 1 0
23 [CMS2006] G24.1+1413 G 14 16 24.1 +23 14 13           ~ 1 0
24 [CMS2006] G24.5+1303 G 14 16 24.5 +23 13 03           ~ 1 0
25 [CMS2006] G24.8+1319 G 14 16 24.8 +23 13 19           ~ 1 0
26 [CMS2006] G25.2+1541 G 14 16 25.2 +23 15 41           ~ 1 0
27 [CMS2006] G26.2+1608 G 14 16 26.2 +23 16 08           ~ 1 0
28 [CMS2006] G26.4+1410 G 14 16 26.4 +23 14 10           ~ 1 0
29 [CMS2006] G16.5+1601 G 14 16 26.5 +23 16 01           ~ 1 0
30 [CMS2006] G26.9+1524 G 14 16 26.9 +23 15 24           ~ 1 0
31 [CMS2006] G27.0+1758 G 14 16 27.0 +23 17 58           ~ 1 0
32 [CMS2006] G27.3+1618 G 14 16 27.3 +23 16 18           ~ 1 0
33 [CMS2006] G27.5+1548 G 14 16 27.5 +23 15 48           ~ 1 0
34 [CMS2006] G27.6+1607 G 14 16 27.6 +23 16 07           ~ 1 0
35 BAX 214.1083+23.2564 GrG 14 16 27.70 +23 15 25.9           ~ 65 0
36 [CMS2006] G28.7+1705 G 14 16 28.7 +23 17 05           ~ 1 0
37 [CMS2006] G28.8+1612 G 14 16 28.8 +23 16 12           ~ 1 0
38 [CMS2006] G28.8+1752 G 14 16 28.8 +23 17 52           ~ 1 0
39 [CMS2006] G28.9+1241 G 14 16 28.9 +23 12 41           ~ 1 0
40 [CMS2006] G28.9+1448 G 14 16 28.9 +23 14 48           ~ 1 0
41 [CMS2006] G29.1+1544 G 14 16 29.1 +23 15 44           ~ 1 0
42 [CMS2006] G30.4+1518 G 14 16 30.4 +23 15 18           ~ 1 0
43 [CMS2006] G30.9+1749 G 14 16 30.9 +23 17 49           ~ 1 0
44 [CMS2006] G31.2+1415 G 14 16 31.2 +23 14 15           ~ 1 0
45 [CMS2006] G33.6+1505 G 14 16 33.6 +23 15 05           ~ 1 0
46 [CMS2006] G33.7+1733 G 14 16 33.7 +23 17 33           ~ 1 0
47 [CMS2006] G34.0+1359 G 14 16 34.0 +23 13 59           ~ 1 0
48 [CMS2006] G34.0+1737 G 14 16 34.0 +23 17 37           ~ 1 0
49 [CMS2006] G34.6+1543 G 14 16 34.6 +23 15 43           ~ 1 0
50 [CMS2006] G35.1+1442 G 14 16 35.1 +23 14 42           ~ 1 0
51 [CMS2006] G35.5+1353 G 14 16 35.5 +23 13 53           ~ 1 0
52 [CMS2006] G36.1+1624 G 14 16 36.1 +23 16 24           ~ 1 0
53 [CMS2006] G36.6+1506 G 14 16 36.6 +23 15 06           ~ 1 0
54 [CMS2006] G36.9+1357 G 14 16 36.9 +23 13 57           ~ 1 0
55 [CMS2006] G37.7+1454 G 14 16 37.7 +23 14 54           ~ 1 0
56 [CMS2006] G37.7+1657 G 14 16 37.7 +23 16 57           ~ 1 0
57 [CMS2006] G37.9+1712 G 14 16 37.9 +23 17 12           ~ 1 0
58 [CMS2006] G38.1+1528 G 14 16 38.1 +23 15 28           ~ 1 0
59 [CMS2006] G38.3+1308 G 14 16 38.3 +23 13 08           ~ 1 0
60 BAX 238.0513+20.2292 ClG 15 52 12.3 +20 13 42           ~ 48 0

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