2017AJ....153..132A


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.14CEST02:08:04

2017AJ....153..132A - Astron. J., 153, 132-132 (2017/March-0)

The HI chronicles of LITTLE THINGS BCDs. III. Gas clouds in and around Mrk 178, VII Zw 403, and NGC 3738.

ASHLEY T., SIMPSON C.E., ELMEGREEN B.G., JOHNSON M. and POKHREL N.R.

Abstract (from CDS):

In most blue compact dwarf (BCD) galaxies, it remains unclear what triggers their bursts of star formation. We study the H i of three relatively isolated BCDs, Mrk 178, VII Zw 403, and NGC 3738, in detail to look for signatures of star formation triggers, such as gas cloud consumption, dwarf-dwarf mergers, and interactions with companions. High angular and velocity resolution atomic hydrogen (H i) data from the Very Large Array (VLA) dwarf galaxy H i survey, Local Irregulars That Trace Luminosity Extremes, The H i Nearby Galaxy Survey (LITTLE THINGS), allow us to study the detailed kinematics and morphologies of the BCDs in H i. We also present high-sensitivity H i maps from the NRAO Green Bank Telescope (GBT) of each BCD to search their surrounding regions for extended tenuous emission or companions. The GBT data do not show any distinct galaxies obviously interacting with the BCDs. The VLA data indicate several possible star formation triggers in these BCDs. Mrk 178 likely has a gas cloud impacting the southeast end of its disk or it is experiencing ram pressure stripping. VII Zw 403 has a large gas cloud in its foreground or background that shows evidence of accreting onto the disk. NGC 3738 has several possible explanations for its stellar morphology and H i morphology and kinematics: an advanced merger, strong stellar feedback, or ram pressure stripping. Although apparently isolated, the H i data of all three BCDs indicate that they may be interacting with their environments, which could be triggering their bursts of star formation.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: dwarf - galaxies: individual: (Mrk 178, VII Zw 403, NGC 3738) - galaxies: star formation - galaxies: star formation

Simbad objects: 28

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Number of rows : 28

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 IC 10 G 00 20 23.16 +59 17 34.7   13.6 9.5     ~ 1035 0
2 NAME Pisces I G 01 03 56.6 +21 53 41   16.18 14.3     ~ 367 0
3 NGC 1569 IG 04 30 49.186 +64 50 52.52 11.72 11.86 11.03     ~ 1176 3
4 UGCA 116 H2G 05 55 42.645 +03 23 32.23 10.74 11.68 11.46   11.82 ~ 508 0
5 NGC 2366 H2G 07 28 51.85 +69 12 31.1 12.25 11.86 11.39 11.33   ~ 717 0
6 UGC 3966 G 07 41 25.777 +40 06 46.05   16.0       ~ 106 0
7 NAME M 81-82 Group GrG 09 55 +69.1           ~ 649 0
8 NAME Leo Dwarf Irregular Galaxy G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 560 0
9 LEDA 32667 LSB 10 52 55.1 +69 32 46   17.2       ~ 78 1
10 UGC 6456 bCG 11 28 00.43 +78 59 38.4   14.50       ~ 315 1
11 UGC 6538 GiC 11 33 17.08 +49 17 03.6   16.0       ~ 17 0
12 Mrk 178 bCG 11 33 29.12 +49 14 17.4 14.69 14.61 14.25 14.17   ~ 218 1
13 IC 708 rG 11 33 59.229 +49 03 43.42   14.2       ~ 126 0
14 NGC 3733 G 11 35 01.6219210967 +54 51 01.675692452   13.2       ~ 79 0
15 NGC 3738 AGN 11 35 48.982 +54 31 24.70   12.12 12.04 11.56   ~ 260 0
16 NGC 3741 G 11 36 05.754 +45 17 02.96 15.01 14.55 14.23 14.06   ~ 198 0
17 NGC 3756 GiG 11 36 48.0236520789 +54 17 36.712658616   12.1       ~ 166 0
18 NGC 4068 G 12 04 03.265 +52 35 26.05   13.29   12.77   ~ 154 0
19 NGC 4163 LSB 12 12 09.108 +36 10 03.13 14.33 13.70 13.2 12.98   ~ 192 0
20 Mrk 209 bCG 12 26 16.02 +48 29 36.6   15.3       ~ 315 0
21 UGC 7950 bCG 12 46 56.426 +51 36 46.80   14.1       ~ 99 0
22 NGC 4707 G 12 48 21.666 +51 09 53.81   15.2       ~ 93 0
23 UGC 8091 H2G 12 58 40.1930291852 +14 13 00.737117016 15.24 15.16 14.98 14.81   ~ 445 0
24 NGC 4861 H2G 12 59 02.340 +34 51 33.98   12.90 12.32     ~ 358 2
25 UGC 8308 G 13 13 22.839 +46 19 21.71   17       ~ 121 1
26 NGC 5253 AGN 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33   ~ 1288 4
27 NAME Aquarius Dwarf G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 406 1
28 NAME Peg Dwarf Irregular Galaxy G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 430 1

    Equat.    Gal    SGal    Ecl

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2021.06.14-02:08:04

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