2010ApJ...725.2333K

Query : 2010ApJ...725.2333K

2010ApJ...725.2333K - Astrophys. J., 725, 2333-2343 (2010/December-3)

Clouds toward the Virgo cluster periphery: gas-rich optically inert galaxies.

KENT B.R.

Abstract (from CDS):

Aperture synthesis observations of two H I cloud complexes located in the periphery of the Virgo galaxy cluster are presented. These low H I-mass clouds (M_ H I_< 109 M☉) are seen projected on the M region of the western Virgo cluster, where the galaxy population is thought to lie behind the main A cluster surrounding M87. The kinematic measurements of both unresolved Arecibo and resolved Very Large Array (VLA)-C observations are in good agreement. The H I detections cannot be identified with any optical, IR, or UV emission from available archival imaging. They are inert at these wavelengths. The H I masses of the individual VLA detections range from 7.28 ≤ log(M_ H I/M☉_) ≤ 7.85. The total dynamical mass estimates are several times their H I content, ranging from 7.00 ≤ log(Mdyn/M☉) ≤ 9.07, with the assumption that the clouds are self-gravitating and in dynamical equilibrium. We report the observed parameters derived from the VLA observations. One of these H I clouds appears to be the most isolated optically inert detection observed in the outer reaches of Virgo.

Abstract Copyright: ∼

Journal keyword(s): galaxies: clusters: individual: Virgo - galaxies: clusters: intracluster medium - galaxies: halos - intergalactic medium - radio lines: galaxies

Nomenclature: Figs 4-5, Table 4: [K2010] Cloud N North (Nos 1-2), [K2010] Cloud N South (Nos 1-2), [K2010] Cloud 2 West N=1.

Simbad objects: 79

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Number of rows : 79
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 LEDA 3547872 AG? 12 05 27.059 +12 32 43.25           ~ 8 0
2 LEDA 1402698 AG? 12 06 40.688 +12 02 04.34           ~ 11 0
3 SDSS J120820.68+123003.9 AG? 12 08 20.689 +12 30 03.94           ~ 10 0
4 AGC 225880 G 12 08 45.6 +11 55 34           ~ 8 0
5 [K2010] Cloud 1 South HI 12 08 47.4 +11 54 48           ~ 4 0
6 [K2010] Cloud 1 North HI 12 08 47.6 +11 55 57           ~ 4 0
7 SDSS J120859.92+115631.2 G 12 08 59.923 +11 56 31.16           ~ 1 0
8 LEDA 38666 LSB 12 09 45.824 +13 33 06.72   22       ~ 8 0
9 IC 3021 GiG 12 09 54.572 +13 02 59.92   15.4       ~ 78 0
10 LEDA 1397674 AG? 12 10 03.269 +11 42 48.84           ~ 17 0
11 LEDA 38722 G 12 10 18.7 +12 19 48           ~ 6 0
12 2MASX J12102434+1310144 GiC 12 10 24.342 +13 10 14.49           ~ 44 0
13 LEDA 38729 BiC 12 10 24.960 +13 21 57.75           ~ 9 0
14 IC 3028 GiG 12 10 35.7587243880 +11 45 38.948516172   14.9       ~ 73 0
15 LEDA 4001997 EmG 12 10 38.1242819088 +13 01 23.984986584           ~ 18 0
16 IC 767 GiG 12 11 02.7290142024 +12 06 14.382907236   14.6       ~ 64 0
17 LEDA 38816 G 12 11 19.500 +11 54 36.42           ~ 8 0
18 LEDA 38828 LSB 12 11 28.224 +13 35 01.50           ~ 7 0
19 SDSS J121140.31+125824.5 AG? 12 11 40.315 +12 58 24.60           ~ 8 0
20 LEDA 4002031 AG? 12 11 41.870 +13 11 46.78   17.35       ~ 10 0
21 LEDA 38844 AG? 12 11 45.717 +13 01 27.17   20       ~ 14 0
22 SDSS J121145.94+131707.9 AG? 12 11 45.9420903000 +13 17 07.795353300           ~ 9 0
23 LEDA 1410554 AG? 12 11 46.777 +12 29 38.28           ~ 8 0
24 LEDA 1441122 AG? 12 11 53.850 +13 48 30.25   17.12       ~ 13 0
25 NAME NGC 4168 Group GrG 12 12.0 +13 24           ~ 69 0
26 LEDA 38872 LSB 12 12 04.2 +12 44 25   19       ~ 17 0
27 LEDA 38883 LSB 12 12 11.119 +12 53 34.98   18       ~ 22 0
28 NGC 4165 GiP 12 12 11.8004144880 +13 14 47.411409372 14.59 14.38 13.54     ~ 136 2
29 IC 3036 GiG 12 12 15.066 +12 29 17.11   15.3       ~ 47 0
30 NGC 4168 Sy2 12 12 17.2692381408 +13 12 18.688208724 12.58 12.11 11.18     ~ 393 1
31 SDSS J121226.80+131646.5 LSB 12 12 26.807 +13 16 46.50           ~ 8 0
32 IC 769 GiG 12 12 32.3204996040 +12 07 25.674097152   14.1       ~ 153 0
33 IC 3041 AG? 12 12 42.661 +12 45 46.23           ~ 20 0
34 LEDA 38941 G 12 12 42.978 +12 07 40.03           ~ 8 0
35 LEDA 38947 AG? 12 12 49.1183823768 +13 20 49.883798508   18       ~ 19 0
36 LEDA 38955 G 12 12 56.192 +13 04 11.71   17.67       ~ 11 0
37 LEDA 4002077 LSB 12 13 09.416 +13 35 03.90   17.49       ~ 18 0
38 LEDA 1433167 AG? 12 13 13.6943832720 +13 31 21.714640680   16.26       ~ 11 0
39 LEDA 38993 AG? 12 13 17.793 +13 09 35.68   16.0       ~ 14 0
40 [K2010] Cloud 2 West HI 12 13 33.1 +12 52 44           ~ 3 0
41 LEDA 39011 G 12 13 34.093 +13 24 06.21           ~ 6 0
42 LEDA 39012 LSB 12 13 35.84 +13 02 04.4   18.06       ~ 18 0
43 AGC 225998 G 12 13 41.8 +12 53 51           ~ 9 0
44 [K2010] Cloud 2 South HI 12 13 41.9 +12 51 16           ~ 3 0
45 [K2010] Cloud 2 North HI 12 13 42.5 +12 54 50           ~ 3 0
46 NGC 4189 GiC 12 13 47.2380839784 +13 25 29.445094632   12.51 11.74     ~ 294 1
47 NGC 4193 AGN 12 13 53.588 +13 10 22.46   13.18 12.31     ~ 175 1
48 LEDA 39042 G 12 13 54.16 +13 52 20.4   20       ~ 7 0
49 LEDA 39054 G 12 14 04.58 +13 39 08.8   21       ~ 6 0
50 LEDA 39065 G 12 14 08.30 +11 57 28.8   20       ~ 10 0
51 LEDA 39071 LSB 12 14 09.825 +13 13 59.80   22       ~ 11 0
52 LEDA 4011431 AG? 12 14 19.869 +13 27 06.51   17.32       ~ 8 0
53 LEDA 39104 LSB 12 14 32.957 +12 06 11.67   18       ~ 28 0
54 NGC 4200 GiG 12 14 44.2252339848 +12 10 50.695597380   14.1       ~ 82 0
55 SDSS J121444.59+124722.7 AG? 12 14 44.596 +12 47 22.75           ~ 14 0
56 LEDA 39159 GiC 12 15 03.98 +13 01 55.5   20       ~ 48 1
57 LEDA 39157 LSB 12 15 04.54 +13 06 29.5           ~ 7 0
58 IC 3063 GiG 12 15 06.819 +12 01 00.29   14.9       ~ 61 0
59 LEDA 39190 G 12 15 20.8 +12 36 56           ~ 5 0
60 LEDA 39204 G 12 15 28.572 +12 38 51.50           ~ 6 0
61 IC 3073 AG? 12 15 35.91 +13 37 10.8   15.19       ~ 24 1
62 LEDA 39236 LSB 12 15 45.510 +12 33 49.75           ~ 7 0
63 LEDA 39244 G 12 15 53.02 +12 01 48.3           ~ 6 0
64 LEDA 39270 G 12 16 02.945 +12 35 45.77           ~ 5 0
65 LEDA 39303 G 12 16 19.606 +13 08 09.46           ~ 7 0
66 LEDA 39324 LSB 12 16 32.57 +13 09 50.6   22       ~ 13 0
67 LEDA 39338 LSB 12 16 39.02 +12 52 20.8           ~ 11 0
68 LEDA 39370 AG? 12 16 58.278 +12 15 48.64   17.77       ~ 17 0
69 IC 3099 LSB 12 17 09.228 +12 27 14.21   15.1       ~ 95 0
70 IC 3101 LSB 12 17 19.6485543456 +11 56 36.472097652   15.5       ~ 78 0
71 LEDA 39409 LSB 12 17 24.68 +13 30 39.4           ~ 9 0
72 LEDA 1419134 EmG 12 17 28.047 +12 55 56.42           ~ 26 0
73 SDSS J121731.31+115715.9 WD* 12 17 31.3163711208 +11 57 16.029243072           DZ 10 0
74 IC 3105 AG? 12 17 33.750 +12 23 17.15   15.0       ~ 97 0
75 M 49 Sy2 12 29 46.8 +08 00 01   13.21 12.17     ~ 2174 2
76 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
77 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
78 NGC 4532 H2G 12 34 19.329 +06 28 03.73   12.3       ~ 304 2
79 NAME Local Group GrG ~ ~           ~ 9325 0

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