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 - 2024 		#notes
1 UGC 12894 G 00 00 22.55 +39 29 43.5   17       ~ 36 0
2 UGC 191 AG? 00 20 05.20 +10 52 48.0   15.6       ~ 83 1
3 NGC 100 LSB 00 24 02.837 +16 29 11.00   14.6       ~ 129 0
4 2MASX J00284944+1549396 EmG 00 28 49.4814299088 +15 49 39.984761604           ~ 4 0
5 UGC 289 G 00 28 59.8117796928 +15 58 14.046658968   17       ~ 13 0
6 2MASX J00290164+1550467 G 00 29 01.6067278800 +15 50 47.132135556           ~ 2 0
7 UGC 290 AG? 00 29 08.37 +15 53 56.8   18       ~ 50 0
8 IC 1574 AG? 00 43 03.82 -22 14 48.8 15.25 14.73 14.35 14.24 14.2 ~ 129 1
9 ESO 540-31 G 00 49 49.3 -21 00 58 16.11 15.64 15.36 14.8 15.5 ~ 133 1
10 UGC 634 LSB 01 01 25.171 +07 37 33.57   15.7       ~ 79 0
11 UGC 685 AG? 01 07 23.0321 +16 41 00.988 15.01 14.55 14.07     ~ 137 0
12 UGC 891 AG? 01 21 18.90 +12 24 43.0 15.36 14.82 14.36 12.87   ~ 106 0
13 UGC 1104 AG? 01 32 42.5190557016 +18 19 01.514434548 15.03 14.56 14.13 13.89   ~ 95 0
14 UGC 1175 LSB 01 39 56.45832 +11 05 49.8336   17       ~ 31 0
15 UGC 1281 LSB 01 49 31.71 +32 35 16.2   13.0       ~ 167 0
16 2MASXI J0149427+323730 G 01 49 42.7235426472 +32 37 30.727748316           ~ 12 1
17 NGC 784 LSB 02 01 16.932 +28 50 14.13 12.97 12.50 12.07 11.83   ~ 196 0
18 UGC 1924 GiG 02 27 49.7635 +31 43 30.264   15.4   14.2   ~ 40 0
19 UGC 2023 GiG 02 33 18.20 +33 29 28.0   14.9   13.59   ~ 89 0
20 UGC 2345 AG? 02 51 52.690 -01 10 22.14   14.0   13.8 14.9 ~ 70 0
21 ESO 481-14 GiG 03 13 40.44 -25 11 17.1   13.82   12.88 13.6 ~ 56 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           ~ 1190 2
24 UGC 3371 AG? 05 56 35.98 +75 19 01.9   17       ~ 89 0
25 MCG+09-12-022 GiC 07 03 59.23 +56 29 10.7   15.3       ~ 10 0
26 UGC 3647 AG? 07 04 50.94 +56 31 13.8   16.0       ~ 37 0
27 UGC 3672 AG? 07 06 27.336 +30 19 23.61   17       ~ 40 0
28 UGC 4117 AG? 07 57 25.948 +35 56 22.05   15.5       ~ 32 0
29 UGC 4121 AG? 07 58 54.20 +58 02 33.0   16.0       ~ 48 0
30 NGC 2552 AG? 08 19 20.5355420472 +50 00 34.590204468 13.44 13.00 12.56     ~ 266 1
31 MCG+00-25-010 Sy1 09 44 01.8742171440 -00 38 31.993352700   15.5       ~ 70 0
32 UGC 5205 GiP 09 44 07.203 -00 39 30.11   14.9   14.68 15.3 ~ 39 0
33 UGC 5288 PaG 09 51 17.241 +07 49 32.05 15.07 14.65 14.18 13.99   ~ 89 0
34 NGC 3104 AG? 10 03 57.185 +40 45 41.43   14.2       ~ 133 0
35 NAME M81 dwB LSB 10 05 30.45024 +70 21 51.4253 15.95 15.56 15.09 14.87   ~ 203 1
36 UGC 5571 AG? 10 19 42.159 +52 03 57.83   17       ~ 38 0
37 NAME CVn I dwA GiC 12 38 40.06 +32 46 00.5 16.91 16.66 16.73 16.62   ~ 232 0
38 UGC 8647 GiC 13 39 48.513 +31 17 36.23   16.814       ~ 26 0
39 UGC 8651 AG? 13 39 53.75 +40 44 25.3 15.37 14.56 14.20 14.10   ~ 155 0
40 UGC 8760 AG? 13 50 51.3127548768 +38 01 14.958828876 15.56 14.78   14.33   ~ 148 0
41 UGC 8833 AG? 13 54 48.8114 +35 50 07.775   16.5   15.20   ~ 117 1
42 UGC 9128 AG? 14 15 57.0834 +23 03 29.871 15.40 14.77 14.41 14.32   ~ 283 0
43 UGC 9211 AG? 14 22 32.1696941112 +45 23 01.932649116   15.7       ~ 77 0
44 NGC 5608 AG? 14 23 18.734 +41 46 36.60   13.96   13.23   ~ 76 0
45 UGC 9240 AG? 14 24 43.21 +44 31 41.8 14.24 13.54 13.17 13.07   ~ 200 0
46 UGC 9500 AG? 14 45 21.50 +07 51 46.0   18       ~ 43 0
47 UGC 9992 AG? 15 41 47.85 +67 15 15.3 15.71 15.22 14.81 14.44   ~ 88 0
48 UGC 10054 AG? 15 43 55.701 +81 48 34.70   14.9       ~ 38 0
49 UGC 10310 AG? 16 16 17.9000468088 +47 02 43.128874644   14.9       ~ 144 0
50 UGC 10351 AG? 16 21 27.960 +28 38 20.37   14.9       ~ 32 0
51 UGC 10445 SBG 16 33 47.1783414768 +28 59 01.521191184   13.30 13.96     ~ 133 1
52 UGC 10669 G 17 00 26.36 +70 17 27.4   17       ~ 24 0
53 UGC 10792 AG? 17 14 01.259 +75 12 07.60   17       ~ 18 0
54 UGC 10805 AG? 17 19 50.99 +14 24 00.6   15.30       ~ 38 0
55 UGC 10991 AG? 17 46 29.4682 +67 20 26.209   17       ~ 20 0
56 NAME Aquarius Dwarf G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 445 1
57 NGC 7077 AG? 21 29 59.634 +02 24 51.75 14.05 14.25 13.67 13.23 12.86 ~ 102 0
58 UGC 11782 AG? 21 38 09.70 +08 57 41.0   15.3       ~ 39 0
59 UGC 11944 AG? 22 12 00.76 +17 54 09.6   16.0       ~ 26 0
60 UGCA 433 AG? 22 39 08.5247 -04 45 37.429   15.0   15.1 14.8 ~ 45 0
61 UGC 12212 AG? 22 50 30.2654507664 +29 08 19.524600636   16.0       ~ 41 0
62 Mrk 324 AG? 23 26 32.783 +18 16 00.07   15.5       ~ 66 0
63 NAME PegDIG G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 474 1
64 UGC 12713 AG? 23 38 14.758 +30 42 33.24   15.1       ~ 56 0

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