2014A&A...566A..71L

Query : 2014A&A...566A..71L

2014A&A...566A..71L - Astronomy and Astrophysics, volume 566A71-71 (2014/6-1)

Dynamics of starbursting dwarf galaxies. III. A H I study of 18 nearby objects.

LELLI F., VERHEIJEN M. and FRATERNALI F.

Abstract (from CDS):

We investigate the dynamics of starbursting dwarf galaxies, using both new and archival HI observations. We consider 18 nearby galaxies that have been resolved into single stars by HST observations, providing their star formation history and total stellar mass. We find that 9 objects have a regularly rotating HI disk, 7 have a kinematically disturbed HI disk, and 2 show unsettled HI distributions. Two galaxies (NGC 5253 and UGC 6456) show a velocity gradient along the minor axis of the HI disk, which we interpret as strong radial motions. For galaxies with a regularly rotating disk we derive rotation curves, while for galaxies with a kinematically disturbed disk, we estimate the rotation velocities in their outer parts. We derive baryonic fractions within about 3 optical scale lengths and find that, on average, baryons constitute at least 30% of the total mass. Despite the star formation having injected ∼1056ergs in the ISM in the past ∼500Myr, these starbursting dwarfs have both baryonic and gas fractions similar to those of typical dwarf irregulars, suggesting that they did not eject a large amount of gas out of their potential wells.

Abstract Copyright: ∼

Journal keyword(s): galaxies: dwarf - galaxies: starburst - galaxies: kinematics and dynamics - galaxies: evolution - dark matter

VizieR on-line data: <Available at CDS (J/A+A/566/A71): tableb1.dat list.dat fits/*>

CDS comments: Table 2 2C 295 not in SIMBAD.

Simbad objects: 36

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Number of rows : 36
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 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 840 1
2 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
3 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
4 NGC 625 AGN 01 35 04.632 -41 26 10.32 12.37 11.78 11.25 11.03 11.5 ~ 312 2
5 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2924 2
6 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
7 NGC 1569 rG 04 30 49.186 +64 50 52.52 11.72 11.86 11.03     ~ 1297 3
8 NGC 1705 Sy2 04 54 13.4661493464 -53 21 39.471592428 12.32 12.96 12.56 12.58 12.9 ~ 692 1
9 Z 395-12 bCG 05 10 48.1123757064 -02 40 53.685168744   14.0 14.4     ~ 91 1
10 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
11 NGC 2366 H2G 07 28 52.4529 +69 12 38.859 12.25 11.86 11.39 11.33   ~ 801 0
12 Z 331-51 GiG 08 37 03.00 +69 46 31.0 15.70 15.46 14.98 14.89   ~ 316 0
13 NGC 2915 AG? 09 26 11.532 -76 37 34.75 13.13 12.93 12.68 11.90 12.8 ~ 371 2
14 Mrk 116 AGN 09 34 02.1 +55 14 25           ~ 1179 1
15 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
16 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
17 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
18 Z 351-62 bCG 11 27 59.90 +78 59 39.0   14.50       ~ 346 1
19 Z 242-46 bCG 11 33 29.12 +49 14 17.4 14.69 14.61 14.25 14.17   ~ 242 1
20 NGC 4068 AG? 12 04 03.265 +52 35 26.05   13.29   12.77   ~ 189 0
21 NGC 4163 LSB 12 12 09.34 +36 10 08.1 14.33 13.70 13.2 12.98   ~ 238 0
22 NGC 4228 SBG 12 15 39.174 +36 19 36.80 10.63 10.30 9.93 9.74   ~ 1017 1
23 Z 244-18 bCG 12 26 15.69 +48 29 38.3   15.3       ~ 364 0
24 6C 122535+365318 QSO 12 27 58.72552577 +36 35 11.8265176   21.5 21.5     ~ 139 1
25 NGC 4449 EmG 12 28 11.118 +44 05 36.81 10.11 9.98 9.64 9.45   ~ 1192 1
26 UGCA 290 IG 12 37 21.7 +38 44 28   17       ~ 75 1
27 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
28 NGC 5253 rG 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33 13.47 ~ 1421 4
29 ICRF J140028.6+621038 Sy2 14 00 28.64823540 +62 10 38.5885744   22.137 20.373 19.530   ~ 187 1
30 3C 295 Sy1 14 11 20.6 +52 12 09   22.34 20.80 18.54   ~ 1021 4
31 Z 133-19 AG? 14 15 57.0834 +23 03 29.871 15.40 14.77 14.41 14.32   ~ 296 0
32 Z 219-66 QSO 14 17 01.716 +43 30 13.52   15.6       ~ 181 0
33 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
34 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
35 NGC 6789 AG? 19 16 41.169 +63 58 23.90   13.76       ~ 122 1
36 NAME Local Group GrG ~ ~           ~ 9325 0

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