2012MNRAS.426.2441D

Query : 2012MNRAS.426.2441D

2012MNRAS.426.2441D - Mon. Not. R. Astron. Soc., 426, 2441-2451 (2012/November-1)

Star formation in HI tails: HCG 92, HCG 100 and six interacting systems.

DE MELLO D.F., URRUTIA-VISCARRA F., MENDES DE OLIVEIRA C., TORRES-FLORES S., CARRASCO E.R. and CYPRIANO E.

Abstract (from CDS):

We present new Gemini spectra of 14 new objects found within the HI tails of Hickson Compact Groups (HCGs) 92 and 100. Nine of them are Galaxy Evolution Explorer (GALEX) far-ultraviolet (FUV) and near-ultraviolet (NUV) sources. The spectra confirm that these objects are members of the compact groups and have metallicities close to solar, with an average value of 12+log(O/H) ∼ 8.5. They have average FUV luminosities 7 x 1040erg/s and very young ages (<100Myr), and two of them resemble tidal dwarf galaxy (TDG) candidates. We suggest that they were created within gas clouds that were ejected during galaxy–galaxy interactions into the intergalactic medium, which would explain the high metallicities of the objects, inherited from the parent galaxies from which the gas originated. We conduct a search for similar objects in six interacting systems with extended HI tails: NGC 2623, NGC 3079, NGC 3359, NGC 3627, NGC 3718 and NGC 4656. We found 35 ultraviolet (UV) sources with ages < 100Myr; however, most of them are on average less luminous/massive than the UV sources found around HCG 92 and HCG 100. We speculate that this might be an environmental effect and that compact groups of galaxies are more favourable to TDG formation than other interacting systems.

Based on observations obtained at the Gemini Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the National Science Foundation (NSF) on behalf of the Gemini partnership: the NSF (United States), the Science and Technology Facilities Council (United Kingdom), the National Research Council (Canada), CONICYT (Chile), the Australian Research Council (Australia), Ministério da Ciência e Tecnologia (Brazil) and Ministerio de Ciencia, Tecnologia e Innovacion Productiva (Argentina) – Observing run ID: GN-2003A-Q-53 and GN-2007B-Q-87.


Abstract Copyright: © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS

Journal keyword(s): galaxies: interactions - intergalactic medium - galaxies: star clusters: general - galaxies: star formation

Nomenclature: Table 1: [DUM2012] HCG NNN NN N=14. Table 2: [DUM2012] NGC NNNN NN N=35.

Simbad objects: 82

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Number of rows : 82
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 [DTM2008] 3 UV 00 01 05.33 +13 01 25.0       19.09   ~ 4 0
2 [DTM2008] 4 UV 00 01 10.23 +13 05 08.9       20.25   ~ 4 0
3 MCG+02-01-009 AG? 00 01 13.3051746288 +13 08 38.132079252   16.01   15.46   ~ 41 0
4 MCG+02-01-010 AG? 00 01 14.971 +13 06 44.65   16.97   14.67   ~ 44 0
5 HCG 100 CGG 00 01 19.783 +13 07 21.81           ~ 58 0
6 NGC 7803 GiG 00 01 19.9689164664 +13 06 40.486549320   13.8   12.62   ~ 98 0
7 Z 433-14 GiG 00 01 26.032 +13 06 46.59   15.3   14.28   ~ 57 0
8 HD 289002 * 06 45 13.3725491952 +02 08 14.685250596 10.06 10.62 10.44     B1 277 0
9 [DUM2012] NGC 2623 2 UV 08 38 19.3213 +25 45 03.990           ~ 1 0
10 [DUM2012] NGC 2623 1 UV 08 38 20.0354 +25 45 30.480           ~ 1 0
11 NGC 2623 LIN 08 38 24.016 +25 45 16.29 14.10 13.99 13.36     ~ 533 2
12 NGC 2782 Sy2 09 14 05.11967 +40 06 49.6800 12.29 12.30 11.63     ~ 494 3
13 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
14 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
15 [DUM2012] NGC 3079 3 UV 10 00 32.2742 +55 36 30.207           ~ 1 0
16 NGC 3073 EmG 10 00 52.0678224264 +55 37 07.881619152 14.12 14.07 13.40     ~ 201 2
17 Z 265-55 AG? 10 01 14.033 +55 43 05.63   14.6       ~ 40 1
18 [DUM2012] NGC 3079 5 UV 10 01 53.3862 +55 44 25.421           ~ 1 0
19 NGC 3079 Sy2 10 01 57.8789863992 +55 40 47.449758324 11.57 11.54 10.86     ~ 1476 3
20 [DUM2012] NGC 3079 4 UV 10 02 00.6299 +55 42 46.406           ~ 1 0
21 [DUM2012] NGC 3079 6 UV 10 02 02.2668 +55 41 08.326           ~ 1 0
22 [DUM2012] NGC 3079 2 UV 10 02 12.3486 +55 35 16.956           ~ 1 0
23 [DUM2012] NGC 3079 1 UV 10 02 14.3079 +55 38 16.239           ~ 1 0
24 NGC 3226 rG 10 23 27.0064075320 +19 53 54.674937420   14.32 13.33     ~ 440 1
25 SDSS J104442.66+630602.0 bCG 10 44 42.669 +63 06 02.09           ~ 23 0
26 [DUM2012] NGC 3359 3 UV 10 46 00.8057 +63 13 17.415           ~ 1 0
27 [DUM2012] NGC 3359 1 UV 10 46 05.3284 +63 08 50.612           ~ 1 0
28 [DUM2012] NGC 3359 4 UV 10 46 05.5920 +63 14 04.560           ~ 1 0
29 [DUM2012] NGC 3359 2 UV 10 46 07.2986 +63 09 39.240           ~ 1 0
30 [DUM2012] NGC 3359 7 UV 10 46 24.9463 +63 16 53.736           ~ 1 0
31 NGC 3359 EmG 10 46 36.845 +63 13 25.10 10.83 11.03 10.57     ~ 380 1
32 [DUM2012] NGC 3359 6 UV 10 47 01.3733 +63 15 44.591           ~ 1 0
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 [DUM2012] NGC 3627 1 UV 11 20 47.6660 +12 58 10.641           ~ 1 0
38 [DUM2012] NGC 3718 7 UV 11 32 04.1968 +53 06 09.415           ~ 1 0
39 [DUM2012] NGC 3718 8 UV 11 32 06.4014 +52 59 30.309           ~ 1 0
40 NGC 3719 G 11 32 13.4583721368 +00 49 09.507252324   13.5   13.4 13.2 ~ 84 0
41 [DUM2012] NGC 3718 11 UV 11 32 18.2520 +53 02 04.283           ~ 1 0
42 [DUM2012] NGC 3718 6 UV 11 32 34.7278 +53 09 02.889           ~ 1 0
43 NGC 3718 Sy2 11 32 34.8571790688 +53 04 04.520222040   11.35 10.61     ~ 408 1
44 [DUM2012] NGC 3718 9 UV 11 32 40.1953 +52 57 01.390           ~ 1 0
45 [DUM2012] NGC 3718 5 UV 11 32 45.2710 +53 09 34.557           ~ 1 0
46 [DUM2012] NGC 3718 4 UV 11 32 49.7241 +53 08 47.097           ~ 1 0
47 [DUM2012] NGC 3718 3 UV 11 32 53.3935 +53 07 49.226           ~ 1 0
48 [DUM2012] NGC 3718 10 UV 11 32 53.7268 +53 02 23.069           ~ 1 0
49 [DUM2012] NGC 3718 2 UV 11 32 59.0332 +53 09 25.741           ~ 1 0
50 [DUM2012] NGC 3718 1 UV 11 33 01.1646 +53 11 14.231           ~ 1 0
51 NGC 4631 GiC 12 42 08.009 +32 32 29.44   9.78 9.19 9.10   ~ 1154 3
52 NGC 4656 GiP 12 43 57.6889089768 +32 10 13.345914504   10.96 10.52     ~ 385 3
53 [DUM2012] NGC 4656 1 UV 12 44 10.6164 +32 15 46.115           ~ 1 0
54 [DUM2012] NGC 4656 6 UV 12 44 15.6519 +32 17 31.034           ~ 1 0
55 [DUM2012] NGC 4656 2 UV 12 44 16.9226 +32 16 15.613           ~ 1 0
56 [DUM2012] NGC 4656 3 UV 12 44 18.5669 +32 16 32.093           ~ 1 0
57 [DUM2012] NGC 4656 7 UV 12 44 19.3945 +32 18 24.483           ~ 1 0
58 [DUM2012] NGC 4656 8 HII 12 44 19.416 +32 18 44.89           ~ 2 0
59 [DUM2012] NGC 4656 4 UV 12 44 19.7388 +32 17 15.585           ~ 1 0
60 [DUM2012] NGC 4656 5 HII 12 44 19.845 +32 16 51.42           ~ 2 0
61 NAME Ursa Major Cluster ClG 15 08.8 +67 07           ~ 424 1
62 BD+28 4211 HS* 21 51 11.0221915656 +28 51 50.367627468 8.922 10.25 10.58 10.656 10.831 sdO2VIIIHe5 837 0
63 NGC 7317 Sy2 22 35 51.8681746944 +33 56 41.758033380 15.10 14.57 13.60 12.72   ~ 182 1
64 [DUM2012] HCG 92 9 SFR 22 35 54.00 +33 57 14.0           ~ 1 0
65 NGC 7318A GiP 22 35 56.70407 +33 57 55.7710   14.4   13.13   ~ 140 0
66 [DUM2012] HCG 92 10 SFR 22 35 57.00 +33 58 47.0           ~ 1 0
67 NAME Stephan's Quintet CGG 22 35 57.5 +33 57 36           ~ 480 1
68 NGC 7320 GiG 22 36 03.4059680280 +33 56 53.623460220 13.12 13.23 12.63 12.38   ~ 204 3
69 NGC 7319 Sy2 22 36 03.602 +33 58 33.18   14.57 13.53 12.65   ~ 325 0
70 [TKB2012] T118 Cl* 22 36 08.77 +33 57 21.0           ~ 3 0
71 [TKB2012] T122 Cl* 22 36 10.25 +33 57 23.3           ~ 3 0
72 [TKB2012] T117 Cl* 22 36 10.28 +33 57 21.0           ~ 2 0
73 [DUM2012] HCG 92 6 SFR 22 36 11.00 +33 57 30.0           ~ 2 0
74 [DUM2012] HCG 92 12 SFR 22 36 11.00 +33 58 26.0           ~ 1 0
75 [DUM2012] HCG 92 11 SFR 22 36 11.00 +33 58 58.0           ~ 1 0
76 [GCH2001] 30 SFR 22 36 11.62 +33 59 01.5           ~ 3 0
77 [DUM2012] HCG 92 1 SFR 22 36 11.92 +33 59 13.3           ~ 3 0
78 [DUM2012] HCG 92 3 SFR 22 36 14.00 +33 58 03.0           ~ 1 0
79 [MCS2004] b SFR 22 36 14.08 +33 58 22.9           ~ 3 0
80 [DUM2012] HCG 92 2 SFR 22 36 15.33 +33 59 02.6           ~ 3 0
81 [DUM2012] HCG 92 8 SFR 22 36 18.00 +33 59 36.0           ~ 1 0
82 [DUM2012] HCG 92 5 SFR 22 39 59.00 +33 59 39.0           ~ 1 0

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