2019AJ....158...23H

Query : 2019AJ....158...23H

2019AJ....158...23H - Astron. J., 158, 23-23 (2019/July-0)

Gas engaged in noncircular motions in LITTLE THINGS dwarf irregular galaxies.

HUNTER D.A., LAUFMAN L., OH S.-H., LEVINE S.E. and SIMPSON C.E.

Abstract (from CDS):

We have examined gas engaged in noncircular motions in 22 of the nearby LITTLE THINGS dwarf irregular galaxies. The H I data cubes have been deconvolved into kinematic components-bulk rotation and noncircular motions-to produce maps of integrated gas, velocity field, and velocity dispersion in the different components. We found significant regions of gas engaged in noncircular motions in half of the galaxies, involving 1%-20% of the total H I mass of the galaxy. In one galaxy we found a pattern in the velocity field that is characteristic of streaming motions around the stellar bar potential and star formation at the end of bar. Two galaxies have large-scale filamentary structures found in their outer disks, and these filaments could be transient instabilities in the gas. We found no spatial correlation between noncircular motion gas and enhanced star formation. We found noncircular motion gas in only one galaxy associated with higher H I velocity dispersion.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: irregular - galaxies: ISM - galaxies: kinematics and dynamics - galaxies: star formation

Simbad objects: 27

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Number of rows : 27
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 MCG-03-01-015 G 00 01 57.9 -15 27 50   11.50 11.10 10.93   ~ 782 2
2 IC 10 rG 00 20 17.33520 +59 18 13.6480   13.6 9.5     ~ 1185 1
3 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1316 2
4 NGC 1097 LIN 02 46 19.059 -30 16 29.68 10.46 9.97 9.48 8.72 9.8 ~ 1448 3
5 NGC 1569 rG 04 30 49.186 +64 50 52.52 11.72 11.86 11.03     ~ 1297 3
6 Z 206-10 AG? 07 28 17.724 +40 46 11.36   15.50       ~ 155 0
7 MCG+07-16-011 AG? 07 41 25.777 +40 06 46.05   16.0       ~ 125 0
8 Z 87-30 G 07 41 56.3059298112 +16 48 07.451632188   15.4       ~ 233 0
9 UGC 4305 IG 08 19 04.9864630512 +70 43 13.086910452 12.06 11.72 11.39 11.11   ~ 812 2
10 MCG+07-18-004 LSB 08 28 28.560 +41 51 27.13   18       ~ 175 0
11 Z 311-8 GiG 08 34 07.20 +66 10 54.0 15.39 15.03 14.70 14.49   ~ 357 2
12 LEDA 86668 LSB 09 02 53.357 +20 04 32.21   16.9       ~ 108 0
13 Z 36-12 H2G 10 00 00.8217342072 +05 20 09.533389560 12.77 12.25 11.89 11.71   ~ 569 0
14 MCG+11-13-039 GiG 10 49 36.412 +65 32 01.07 15.55 15.27 14.79 14.55   ~ 170 0
15 Z 351-62 bCG 11 27 59.90 +78 59 39.0   14.50       ~ 346 1
16 NGC 3738 AGN 11 35 48.982 +54 31 24.70   12.12 12.04 11.56   ~ 303 0
17 Z 157-55 AG? 11 55 39.7060218792 +31 31 06.535928784   15.7       ~ 138 0
18 Z 244-18 bCG 12 26 15.69 +48 29 38.3   15.3       ~ 364 0
19 Z 187-44 GiP 12 27 05.566 +37 08 30.39   14.19   13.55   ~ 217 0
20 Z 159-13 GiC 12 32 54.5 +31 32 30   13.50   13.03   ~ 180 0
21 NAME CVn I dwA GiC 12 38 40.06 +32 46 00.5 16.91 16.66 16.73 16.62   ~ 242 0
22 Z 270-22 bCG 12 46 56.426 +51 36 46.80   14.1       ~ 119 0
23 NGC 4789A GiC 12 54 05.248 +27 08 58.67 14.37 14.23 13.95 13.84   ~ 614 1
24 Z 245-36 AG? 13 14 27.997 +45 55 11.14 13.63 13.26 13.02 12.81   ~ 297 0
25 Z 271-48 EmG 13 30 44.8682655624 +54 54 38.522749824 14.72 14.25 13.90 13.75   ~ 218 0
26 NGC 5253 rG 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33 13.47 ~ 1421 4
27 MCG-02-53-003 G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 470 1

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