2001AJ....121..710S

Query : 2001AJ....121..710S

2001AJ....121..710S - Astron. J., 121, 710-726 (2001/February-0)

New observations of extra-disk molecular gas in interacting galaxy systems, including a two-component system in Stephan's quintet.

SMITH B.J. and STRUCK C.

Abstract (from CDS):

We present new CO (1-0) observations of 11 extragalactic tails and bridges in nine interacting galaxy systems, almost doubling the number of such features with sensitive CO measurements. Eight of these 11 features were undetected in CO to very low CO/H I limits, with the most extreme case being the NGC 7714/5 bridge. This bridge contains luminous H II regions and has a very high H I column density (1.6x1021 cm–2 in the 55" CO beam), yet was undetected in CO to rms T*R=2.4 mK. The H I column density is higher than standard H2 and CO self-shielding limits for solar-metallicity gas, suggesting that the gas in this bridge is metal-poor and has an enhanced NH2/ICO ratio compared with the Galactic value. Only one of the 11 features in our sample was unambiguously detected in CO, a luminous H I-rich star formation region near an optical tail in the compact group Stephan's Quintet. We detect CO at two widely separated velocities in this feature, at ∼6000 and ∼6700 km.s–1. Both of these components have H I and Hα counterparts. These velocities correspond to those of galaxies in the group, suggesting that this gas is material that has been removed from two galaxies in the group. The CO/H I/Hα ratios for both components are similar to global values for spiral galaxies.

Abstract Copyright: ∼

Journal keyword(s): galaxies: individual (Stephan's Quintet) - Galaxies: Individual: NGC Number: NGC 7714 - Galaxies: Individual: NGC Number: NGC 7715 - Galaxies: Interactions - Galaxies: ISM

CDS comments: T.1, 2: MK 208 misprint for Mrk 108.

Simbad objects: 67

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Number of rows : 67
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 Z 477-40 LIN 00 01 38.3220061296 +23 29 01.190922432   13.2       ~ 159 1
2 NAME UGC 12914/5 Bridge PoG 00 01 40 +23 29.3           ~ 9 0
3 NAME Taffy System PaG 00 01 40.12 +23 29 23.0           ~ 63 1
4 Z 477-41 GiP 00 01 41.937 +23 29 45.20   13.9       ~ 127 1
5 NGC 7828 AG? 00 06 27.082 -13 24 58.07   14       ~ 55 0
6 NGC 7829 EmG 00 06 28.9840063680 -13 25 14.217196296   15.07       ~ 26 0
7 NAME Arp 144 Tail PoG 00 06.7 -13 28           ~ 2 0
8 NAME Arp 143 Tail PoG 07 46 39.6 +39 10 46           ~ 2 0
9 NGC 2444 AG? 07 46 53.0555407896 +39 01 55.100891208   13.1       ~ 110 1
10 NGC 2742 GiG 09 07 33.5746410432 +60 28 45.818789124   12.0       ~ 214 0
11 NAME NGC 2782 West Tail ? 09 13 52.6 +40 07 50           ~ 2 0
12 NGC 2782 Sy2 09 14 05.11967 +40 06 49.6800 12.29 12.30 11.63     ~ 494 3
13 NAME NGC 2782 East Tail ? 09 14 15 +40 07.3           ~ 2 0
14 NGC 2814 GiP 09 21 11.525 +64 15 11.73   14.0       ~ 87 0
15 NAME NGC 2814/20 Bridge Cld 09 21 19 +64 14.6           ~ 3 0
16 NGC 2820A H2G 09 21 30.1318400448 +64 14 19.768079076   14.9       ~ 84 0
17 NAME NGC 2814-2820 Group ClG 09 21.7 +64 16           ~ 5 0
18 NGC 2820 GiP 09 21 45.564 +64 15 28.87   13.1       ~ 172 0
19 NGC 2992 Sy2 09 45 42.045 -14 19 34.90 13.54 13.14 12.18 12.6 12.2 ~ 951 3
20 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
21 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
22 NAME M 81 CO Clump PoG 09 58.0 +69 04           ~ 2 0
23 NGC 3077 GiP 10 03 19.0965510921 +68 44 01.556166166 11.23 10.85 10.14 9.74   ~ 808 0
24 NAME NGC 3077 CO Clump PoG 10 03 56 +68 42.8           ~ 2 0
25 APG 270 PaG 10 49 50.07 +32 58 55.4           ~ 186 1
26 NGC 3395 GiG 10 49 50.1160141680 +32 58 58.421838360   12.1 12.10     ~ 292 1
27 NAME NGC 3395/6 Bridge PoG 10 49 53.1 +32 59 12           ~ 2 0
28 NGC 3396 GiP 10 49 55.939 +32 59 26.44   12.6 12.50     ~ 214 1
29 NAME NGC 3561 Irregular G 11 11 13.02 +28 45 58.1     15.94     ~ 7 1
30 NGC 3561A GiC 11 11 13.0419775539 +28 42 42.744633151   14.7       ~ 76 1
31 NGC 3561 LIN 11 11 13.1887412409 +28 41 47.044176908   14.7       ~ 202 2
32 NAME Ambartsumian's Knot G 11 11 13.424 +28 41 16.17   18.5       ~ 13 2
33 M 65 GiP 11 18 55.9084654776 +13 05 32.300703672   9.6       ~ 458 1
34 NAME Leo Triplet IG 11 19 +13.2           ~ 132 1
35 M 66 AGN 11 20 15.0 +12 59 29 9.85 9.65 8.92     ~ 1509 4
36 NGC 3628 LIN 11 20 17.018 +13 35 22.16   10.42 9.48 9.22   ~ 853 3
37 NAME NGC 3628 Tail PoG 11 23.3 +13 44           ~ 3 1
38 NAME NGC 4038/9 Tail PoG 12 02 00 -18 53.5           ~ 2 0
39 NGC 4410 LIN 12 26 28.2946646976 +09 01 11.500520016   13.6 13.20     ~ 119 1
40 NAME NGC 4410A+B Tail ? 12 26 30.8 +09 00 35           ~ 2 1
41 NGC 4435 GiG 12 27 40.503 +13 04 44.48 12.23 11.74 10.80     ~ 474 2
42 NAME NGC 4438 CO Clump PoG 12 27 45.5 +13 00 34           ~ 2 0
43 NGC 4438 LIN 12 27 45.6705493536 +13 00 31.708096380 11.37 11.02 10.17     ~ 668 2
44 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
45 NAME NGC 4676 North Tail PoG 12 46 10 +30 45.0           ~ 2 0
46 NGC 4676A AGN 12 46 10.05987 +30 43 54.6380           ~ 286 2
47 NGC 4676 IG 12 46 10.18 +30 43 53.7   14.1       ~ 318 0
48 Z 199-8 G 17 40 54.822 +38 43 56.09   15.0       ~ 27 0
49 ZW I 192b G 17 40 58.7691233544 +38 44 46.127287932           ~ 3 0
50 NAME ZW I 192 Plume PoG 17 40 59.9 +38 45 10           ~ 1 0
51 NAME NGC 7252 North Tail PoG 22 20 33.4 -24 37 06           ~ 2 0
52 NGC 7252 AGN 22 20 44.7748209648 -24 40 41.909518200 12.26 12.46 12.06 11.57   ~ 720 1
53 NAME NGC 7252 South Tail PoG 22 20 56.6 -24 41 10           ~ 5 0
54 NGC 7317 Sy2 22 35 51.8681746944 +33 56 41.758033380 15.10 14.57 13.60 12.72   ~ 182 1
55 NGC 7318A GiP 22 35 56.70407 +33 57 55.7710   14.4   13.13   ~ 140 0
56 NAME Stephan's Quintet CGG 22 35 57.5 +33 57 36           ~ 480 1
57 NGC 7318B GiP 22 35 58.3903354632 +33 57 57.827617524   14.06   12.47   ~ 144 0
58 NGC 7320 GiG 22 36 03.4059680280 +33 56 53.623460220 13.12 13.23 12.63 12.38   ~ 204 3
59 NGC 7319 Sy2 22 36 03.602 +33 58 33.18   14.57 13.53 12.65   ~ 325 0
60 NGC 7320C AG? 22 36 20.3659207800 +33 59 06.140904000   17       ~ 54 0
61 [XST99] Source A HII 23 35 58.7 +33 58 55           ~ 14 1
62 NAME NGC 7714 Loop PoG 23 36 14.1 +02 10 08           ~ 2 0
63 NGC 7714 AGN 23 36 14.1257730600 +02 09 18.197422668   14.91 14.36     ~ 788 1
64 NAME NGC 7714/5 Bridge PoG 23 36 18.4 +02 09 16           ~ 3 0
65 APG 284 PaG 23 36 19 +02 09.3   12.6       ~ 608 0
66 NGC 7715 GiP 23 36 21.768 +02 09 25.30   11.81 12.14     ~ 142 0
67 NAME NGC 7715 Tail PoG 23 36 24.6 +02 09 48           ~ 3 0

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