2000AJ....119.2757V

Query : 2000AJ....119.2757V

2000AJ....119.2757V - Astron. J., 119, 2757-2779 (2000/June-0)

The evolutionary status of isolated dwarf irregular galaxies. I. UBV and Hα imaging observations.

VAN ZEE L.

Abstract (from CDS):

The results of UBV and Hα imaging of a large sample of gas-rich, isolated, dwarf irregular galaxies are presented. The majority of the low-luminosity systems in this sample have no known neighbors within 200-400 kpc and thus are unlikely to have had significant interactions within the last several gigayears. The new observations confirm that dwarf irregular galaxies are blue systems, with median values for the sample of 0.42±0.040.05 in B-V and -0.22±0.040.07 in U-B. Analysis of the derived surface photometry indicates that most of these systems can be well fitted by single exponential disks and have only minor color gradients. Furthermore, the observed H II regions are distributed sparsely across the optical disk. H II region luminosity functions were constructed for those systems with a sufficient number of H II regions; the derived power-law indices are generally shallow, with a median value of -1.61±0.310.24.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Dwarf - Galaxies: Fundamental Parameters - Galaxies: Irregular - Galaxies: Photometry

Nomenclature: 2MASXI JHHMMSSs+DDMMSS N=3.

Simbad objects: 64

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Number of rows : 64
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 UGC 12894 G 00 00 22.55 +39 29 43.5   17       ~ 36 0
2 Z 434-1 AG? 00 20 05.20 +10 52 48.0   15.6       ~ 87 1
3 NGC 100 LSB 00 24 02.837 +16 29 11.00   14.6       ~ 139 0
4 2MASX J00284944+1549396 EmG 00 28 49.4814299088 +15 49 39.984761604           ~ 5 0
5 UGC 289 G 00 28 59.8117796928 +15 58 14.046658968   17       ~ 17 0
6 LEDA 1494682 G 00 29 01.6067278800 +15 50 47.132135556           ~ 3 0
7 UGC 290 AG? 00 29 08.37 +15 53 56.8   18       ~ 54 0
8 IC 1574 AG? 00 43 03.82 -22 14 48.8 15.25 14.73 14.35 14.24 14.2 ~ 137 1
9 MCG-04-03-019 G 00 49 49.3 -21 00 58 16.11 15.64 15.36 14.8 15.5 ~ 144 1
10 Z 410-23 LSB 01 01 25.171 +07 37 33.57   15.7       ~ 84 0
11 Z 458-20 AG? 01 07 23.0321 +16 41 00.988 15.01 14.55 14.07     ~ 148 0
12 Z 436-33 AG? 01 21 18.90 +12 24 43.0 15.36 14.82 14.36 12.87   ~ 112 0
13 Z 460-6 AG? 01 32 42.5190557016 +18 19 01.514434548 15.03 14.56 14.13 13.89   ~ 101 0
14 UGC 1175 LSB 01 39 56.45832 +11 05 49.8336   17       ~ 32 0
15 Z 503-26 LSB 01 49 31.71 +32 35 16.2   13.0       ~ 171 0
16 LEDA 212843 G 01 49 42.7235426472 +32 37 30.727748316           ~ 13 1
17 NGC 784 LSB 02 01 16.932 +28 50 14.13 12.97 12.50 12.07 11.83   ~ 212 0
18 Z 504-86 GiG 02 27 49.7635 +31 43 30.264   15.4   14.2   ~ 42 0
19 Z 505-6 GiG 02 33 18.20 +33 29 28.0   14.9   13.59   ~ 91 0
20 MCG+00-08-035 AG? 02 51 52.690 -01 10 22.14   14.0   13.8 14.9 ~ 74 0
21 MCG-04-08-051 GiG 03 13 40.44 -25 11 17.1   13.82   12.88 13.6 ~ 63 0
22 UGC 2603 AG? 03 19 18.18 +81 20 44.6   17       ~ 19 0
23 NAME 30 Dor Nebula SFR 05 38 36.0 -69 05 11           ~ 1276 2
24 MCG+13-05-007a AG? 05 56 35.98 +75 19 01.9   17       ~ 89 0
25 Z 261-17 GiC 07 03 59.23 +56 29 10.7   15.3       ~ 11 0
26 MCG+09-12-027 AG? 07 04 50.94 +56 31 13.8   16.0       ~ 39 0
27 UGC 3672 AG? 07 06 27.336 +30 19 23.61   17       ~ 43 0
28 Z 178-8 AG? 07 57 25.948 +35 56 22.05   15.5       ~ 33 0
29 MCG+10-12-046 AG? 07 58 54.20 +58 02 33.0   16.0       ~ 52 0
30 NGC 2552 EmG 08 19 20.5355420472 +50 00 34.590204468 13.44 13.00 12.56     ~ 284 1
31 Z 7-25 Sy1 09 44 01.8742171440 -00 38 31.993352700   15.5       ~ 89 0
32 Z 7-26 GiP 09 44 07.203 -00 39 30.11   14.9   14.68 15.3 ~ 42 0
33 UGC 5288 PaG 09 51 17.241 +07 49 32.05 15.07 14.65 14.18 13.99   ~ 95 0
34 NGC 3104 AG? 10 03 57.185 +40 45 41.43   14.2       ~ 142 0
35 Z 333-17 LSB 10 05 30.45024 +70 21 51.4253 15.95 15.56 15.09 14.87   ~ 214 1
36 UGC 5571 AG? 10 19 42.159 +52 03 57.83   17       ~ 42 0
37 NAME CVn I dwA GiC 12 38 40.06 +32 46 00.5 16.91 16.66 16.73 16.62   ~ 242 0
38 MCG+05-32-059 GiC 13 39 48.513 +31 17 36.23   16.814       ~ 28 0
39 Z 218-34 AG? 13 39 53.75 +40 44 25.3 15.37 14.56 14.20 14.10   ~ 165 0
40 Z 190-66 AG? 13 50 51.3127548768 +38 01 14.958828876 15.56 14.78   14.33   ~ 161 0
41 MCG+06-31-023 AG? 13 54 48.8114 +35 50 07.775   16.5   15.20   ~ 123 1
42 Z 133-19 AG? 14 15 57.0834 +23 03 29.871 15.40 14.77 14.41 14.32   ~ 296 0
43 Z 247-23 AG? 14 22 32.1696941112 +45 23 01.932649116   15.7       ~ 78 0
44 NGC 5608 AG? 14 23 18.734 +41 46 36.60   13.96   13.23   ~ 81 0
45 Z 247-26 AG? 14 24 43.21 +44 31 41.8 14.24 13.54 13.17 13.07   ~ 217 0
46 UGC 9500 AG? 14 45 21.50 +07 51 46.0   18       ~ 44 0
47 Z 319-21 AG? 15 41 47.85 +67 15 15.3 15.71 15.22 14.81 14.44   ~ 93 0
48 Z 366-23 AG? 15 43 55.701 +81 48 34.70   14.9       ~ 43 0
49 Z 251-4 AG? 16 16 17.9000468088 +47 02 43.128874644   14.9       ~ 151 0
50 Z 167-70 AG? 16 21 27.960 +28 38 20.37   14.9       ~ 33 0
51 Z 168-21 SBG 16 33 47.1783414768 +28 59 01.521191184   13.30 13.96     ~ 140 1
52 UGC 10669 G 17 00 26.36 +70 17 27.4   17       ~ 25 0
53 UGC 10792 AG? 17 14 01.259 +75 12 07.60   17       ~ 19 0
54 Z 82-19 AG? 17 19 50.99 +14 24 00.6   15.30       ~ 39 0
55 MCG+11-22-001 AG? 17 46 29.4682 +67 20 26.209   17       ~ 21 0
56 MCG-02-53-003 G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 470 1
57 NGC 7077 AG? 21 29 59.634 +02 24 51.75 14.05 14.25 13.67 13.23 12.86 ~ 106 0
58 Z 402-10 AG? 21 38 09.70 +08 57 41.0   15.3       ~ 42 0
59 MCG+03-56-018 AG? 22 12 00.76 +17 54 09.6   16.0       ~ 28 0
60 MCG-01-57-019 AG? 22 39 08.5247 -04 45 37.429   15.0   15.1 14.8 ~ 49 0
61 MCG+05-53-019 AG? 22 50 30.2654507664 +29 08 19.524600636   16.0       ~ 42 0
62 Mrk 324 AG? 23 26 32.783 +18 16 00.07   15.5       ~ 66 0
63 Z 431-72 G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 499 1
64 Z 497-44 AG? 23 38 14.758 +30 42 33.24   15.1       ~ 57 0

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