2009ApJ...705..723C

Query : 2009ApJ...705..723C

2009ApJ...705..723C - Astrophys. J., 705, 723-738 (2009/November-1)

Chemical abundances of seven irregular and three tidal dwarf galaxies in the M81 group.

CROXALL K.V., VAN ZEE L., LEE H., SKILLMAN E.D., LEE J.C., COTE S., KENNICUTT R.C. and MILLER B.W.

Abstract (from CDS):

We have derived nebular abundances for 10 dwarf galaxies belonging to the M81 Group, including several galaxies which do not have abundances previously reported in the literature. For each galaxy, multiple H II regions were observed with GMOS-N at the Gemini Observatory in order to determine abundances of several elements (oxygen, nitrogen, sulfur, neon, and argon). For seven galaxies, at least one H II region had a detection of the temperature sensitive [O III] λ4363 line, allowing a "direct" determination of the oxygen abundance. No abundance gradients were detected in the targeted galaxies, and the observed oxygen abundances are typically in agreement with the well-known metallicity-luminosity relation. However, three candidate "tidal dwarf" galaxies lie well off this relation: UGC 5336, Garland, and KDG 61. The nature of these systems suggests that UGC 5336 and Garland are indeed recently formed systems, whereas KDG 61 is most likely a dwarf spheroidal galaxy which lies along the same line of sight as the M81 tidal debris field. We propose that these H II regions formed from previously enriched gas which was stripped from nearby massive galaxies (e.g., NGC 3077 and M81) during a recent tidal interaction.

Abstract Copyright: ∼

Journal keyword(s): galaxies: abundances - galaxies: dwarf - galaxies: individual (Garland, KDG 61, UGC 5336) - galaxies: interactions

Nomenclature: Table 2: [CVL2009] UGC 4305-NN N=9 among (Nos 2-13), [CVL2009] UGC 4459-N N=6 among (Nos 2-7), [CVL2009] UGC 5139-N N=3 among (Nos 1-5), [CVL2009] UGC 5336-NN N=6 among (Nos 3-12), [CVL2009] UGC 5666-NN N=11 among (Nos 1-14), [CVL2009] UGC 5692-N N=5 among (Nos 3-8), [CVL2009] UGC 5918-N (Nos 3-4), [CVL2009] UGC 8201-NN N=5 among (Nos 4-15), [CVL2009] KDG 61-N (Nos 8-9), [CVL2009] Garland-NN N=9 among (Nos 1-11).

Simbad objects: 90

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Number of rows : 90
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 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
2 NGC 2366 H2G 07 28 52.4529 +69 12 38.859 12.25 11.86 11.39 11.33   ~ 801 0
3 NGC 2403 AGN 07 36 51.3381434280 +65 36 09.650825640 9.31 8.84 8.38 8.19   ~ 1887 1
4 HK Ho II 21 HII 08 18 50.45 +70 44 49.7           ~ 9 0
5 UGC 4305 IG 08 19 04.9864630512 +70 43 13.086910452 12.06 11.72 11.39 11.11   ~ 812 2
6 HK Ho II 13 HII 08 19 09.96 +70 43 17.9           ~ 5 0
7 [CVL2009] UGC 4305-8 HII 08 19 11.90 +70 43 10.8           ~ 2 0
8 [CVL2009] UGC 4305-7 HII 08 19 12.54 +70 43 04.2           ~ 2 0
9 [CVL2009] UGC 4305-2 HII 08 19 27.77 +70 42 07.9   17.4       ~ 7 0
10 [CVL2009] UGC 4305-5 HII 08 19 28.35 +70 42 52.0           ~ 2 0
11 [CVL2009] UGC 4305-3 HII 08 19 28.88 +70 42 19.5   13.4   12.9   ~ 16 0
12 [ZEH2003] RX J0819.4+7042 10 HII 08 19 30.20 +70 42 40.5   19.1       ~ 7 0
13 [CVL2009] UGC 4305-11 HII 08 19 42.96 +70 43 59.6           ~ 2 0
14 NAME M 81 Dwarf A G 08 23 55.1 +71 01 56   16.5       ~ 209 1
15 [CVL2009] UGC 4459-4 HII 08 34 03.73 +66 10 38.0           ~ 4 0
16 Z 311-8 GiG 08 34 07.20 +66 10 54.0 15.39 15.03 14.70 14.49   ~ 357 2
17 [CVL2009] UGC 4459-5 HII 08 34 07.33 +66 10 52.0   20.63       ~ 4 0
18 [CVL2009] UGC 4459-3 HII 08 34 11.06 +66 10 21.1   21.20       ~ 4 0
19 [CVL2009] UGC 4459-2 G 08 34 12.44 +66 10 15.8           ~ 1 0
20 [CVL2009] UGC 4459-7 G 08 34 14.44 +66 12 19.8           ~ 1 0
21 [CVL2009] UGC 4459-6 HII 08 34 18.26 +66 11 24.2           ~ 1 0
22 Z 331-51 GiG 08 37 03.00 +69 46 31.0 15.70 15.46 14.98 14.89   ~ 316 0
23 Z 332-57 LSB 09 40 32.33 +71 10 56.0 14.53 14.00 13.66 13.41   ~ 372 1
24 [MH94a] Ho I 22 HII 09 40 36.71 +71 09 55.6           ~ 4 0
25 [MH94a] Ho I 29 HII 09 40 44.31 +71 10 54.5           ~ 4 0
26 [CVL2009] UGC 5139-3 HII 09 40 46.82 +71 10 14.6           ~ 2 0
27 NGC 2976 GiG 09 47 15.458 +67 54 58.97 11.77 11.03 10.16 9.51   ~ 712 1
28 LEDA 28529 G 09 53 48.8 +68 58 09   18.89       ~ 97 1
29 NAME M 81-82 Group GrG 09 55 +69.1           ~ 758 0
30 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
31 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
32 [CVL2009] KDG 61-9 HII 09 56 41.88 +68 37 05.9           ~ 3 0
33 [CVL2009] KDG 61-8 G 09 56 43.82 +68 36 39.7           ~ 1 0
34 Anon 0951+68 A PoG 09 57 02.67 +68 35 34.6   21.63 20.67     ~ 2 0
35 LEDA 28731 G 09 57 02.7 +68 35 30   15.17       ~ 119 1
36 Anon 0951+68 B PoG 09 57 07.50 +68 35 53.7   19.81 19.80     ~ 3 0
37 [CVL2009] UGC 5336-12 HII 09 57 30.64 +69 02 48.7           ~ 3 0
38 MCG+12-10-012 AG? 09 57 32.8632 +69 02 50.735 15.19 15.15 14.10 14.12   ~ 327 4
39 [CVL2009] UGC 5336-11 SNR 09 57 33.64 +69 04 55.1           ~ 1 0
40 [CVL2009] UGC 5336-10 SNR 09 57 36.30 +69 02 15.2           ~ 1 0
41 [CVL2009] UGC 5336-9 G 09 57 37.34 +69 02 10.9           ~ 1 0
42 [CVL2009] UGC 5336-6 G 09 57 47.40 +69 05 40.4           ~ 1 0
43 [CVL2009] UGC 5336-3 HII 09 57 54.18 +69 03 48.6           ~ 12 1
44 NGC 3077 GiP 10 03 19.0965510921 +68 44 01.556166166 11.23 10.85 10.14 9.74   ~ 808 0
45 NAME Garland G 10 03 43.1 +68 41 32           ~ 69 2
46 [CVL2009] Garland-11 HII 10 03 57.76 +68 41 28.2           ~ 1 0
47 [CVL2009] Garland-10 HII 10 03 58.75 +68 40 42.2           ~ 1 0
48 [CVL2009] Garland-9 HII 10 04 01.83 +68 41 24.4           ~ 1 0
49 [CVL2009] Garland-8 HII 10 04 05.99 +68 41 05.5           ~ 1 0
50 [CVL2009] Garland-6 HII 10 04 14.65 +68 42 38.3           ~ 1 0
51 [CVL2009] Garland-5 HII 10 04 17.92 +68 39 53.0           ~ 1 0
52 [CVL2009] Garland-4 HII 10 04 26.02 +68 42 30.2           ~ 1 0
53 [CVL2009] Garland-3 HII 10 04 27.21 +68 42 33.4           ~ 1 0
54 [CVL2009] Garland-1 HII 10 04 28.55 +68 39 59.3           ~ 1 0
55 ACO 952 ClG 10 13 43.2 +19 46 31           ~ 17 0
56 LEDA 4689216 GiG 10 21 25.2 +71 06 58           ~ 62 0
57 IC 2574 AG? 10 28 23.6148831408 +68 24 43.440012756 11.70 11.07 10.87 10.74   ~ 703 1
58 HK IC 2574 21 HII 10 28 30.54 +68 28 08.6           ~ 3 0
59 [CVL2009] UGC 5666-13 HII 10 28 31.17 +68 28 00.5           ~ 2 0
60 [MH94a] IC 2574 133 HII 10 28 37.30 +68 27 56.4           ~ 4 1
61 [CVL2009] UGC 5666-10 HII 10 28 38.53 +68 28 12.9           ~ 4 0
62 [MH94a] IC 2574 140 HII 10 28 39.34 +68 28 29.7           ~ 4 0
63 [CVL2009] UGC 5666-8 HII 10 28 44.14 +68 28 31.6           ~ 5 1
64 [CVL2009] UGC 5666-3 HII 10 28 48.46 +68 28 02.9           ~ 9 0
65 HK IC 2574 34 HII 10 28 48.88 +68 28 34.4           ~ 5 0
66 [CVL2009] UGC 5666-5 HII 10 28 49.59 +68 28 27.9           ~ 6 1
67 [MH94a] IC 2574 233 HII 10 28 55.52 +68 27 55.1           ~ 4 0
68 [CVL2009] UGC 5666-2 HII 10 28 58.93 +68 28 28.2           ~ 5 0
69 [CVL2009] UGC 5692-8 EmO 10 30 33.31 +70 37 16.7           ~ 1 0
70 Z 333-35 GiG 10 30 35.03 +70 37 07.2 14.81 13.69 13.01 12.73   ~ 140 0
71 [CVL2009] UGC 5692-7 EmO 10 30 36.55 +70 37 24.5           ~ 1 0
72 [CVL2009] UGC 5692-3 HII 10 30 44.44 +70 38 17.9           ~ 1 0
73 [CVL2009] UGC 5692-6 HII 10 30 53.77 +70 37 44.0           ~ 1 0
74 [CVL2009] UGC 5692-4 HII 10 30 58.41 +70 38 01.6           ~ 1 0
75 [CVL2009] UGC 5918-3 HII 10 49 29.77 +65 31 59.5           ~ 1 0
76 MCG+11-13-039 GiG 10 49 36.412 +65 32 01.07 15.55 15.27 14.79 14.55   ~ 170 0
77 [CVL2009] UGC 5918-4 HII 10 49 38.96 +65 32 17.3           ~ 1 0
78 LEDA 32667 LSB 10 52 55.1 +69 32 46   17.2       ~ 88 1
79 Z 351-62 bCG 11 27 59.90 +78 59 39.0   14.50       ~ 346 1
80 Z 315-26 AG? 12 14 08.40 +66 05 41.0   14.60       ~ 89 1
81 NGC 4236 GiG 12 16 42.118 +69 27 45.25 10.97 10.58 10.08 9.90   ~ 415 1
82 NAME Local Supercluster SCG 12 31 +12.4           ~ 566 0
83 BD+18 2647 HS* 12 41 51.7899961800 +17 31 19.750566756 10.261 11.70 11.63 11.969 12.159 sdOpec 185 1
84 [CVL2009] UGC 8201-4 HII 13 06 16.42 +67 42 08.4           ~ 2 0
85 [CVL2009] UGC 8201-8 G 13 06 22.64 +67 42 02.3           ~ 1 0
86 [CVL2009] UGC 8201-9 HII 13 06 24.52 +67 43 41.2           ~ 1 0
87 Z 316-9 AG? 13 06 24.85 +67 42 25.0 14.08 13.61 13.08 12.98   ~ 268 1
88 [CVL2009] UGC 8201-11 EmO 13 06 29.21 +67 42 27.0           ~ 1 0
89 [CVL2009] UGC 8201-15 G 13 06 43.95 +67 42 42.2           ~ 1 0
90 NAME Local Group GrG ~ ~           ~ 9325 0

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