2017AJ....153..163M


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.14CET23:10:12

2017AJ....153..163M - Astron. J., 153, 163-163 (2017/April-0)

The nature of turbulence in the LITTLE THINGS dwarf irregular galaxies.

MAIER E., ELMEGREEN B.G., HUNTER D.A., CHIEN L.-H., HOLLYDAY G. and SIMPSON C.E.

Abstract (from CDS):

We present probability density functions and higher order (skewness and kurtosis) analyses of the galaxy-wide and spatially resolved distributions of H i column density in the LITTLE THINGS sample of dwarf irregular galaxies. This analysis follows that of Burkhart et al. for the Small Magellanic Cloud (SMC). About 60% of our sample have galaxy-wide values of kurtosis that are similar to that found for the SMC, with a range up to much higher values, and kurtosis increases with integrated star formation rate. Kurtosis and skewness were calculated for radial annuli and for a grid of 32 pixel x 32 pixel kernels across each galaxy. For most galaxies, kurtosis correlates with skewness. For about half of the galaxies, there is a trend of increasing kurtosis with radius. The range of kurtosis and skewness values is modeled by small variations in the Mach number close to the sonic limit and by conversion of H i to molecules at high column density. The maximum H i column densities decrease with increasing radius in a way that suggests molecules are forming in the weak-field limit, where H2 formation balances photodissociation in optically thin gas at the edges of clouds.

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

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

Simbad objects: 43

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Number of rows : 43

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME WLM Galaxy G 00 01 57.9 -15 27 50   11.50 11.10 10.93   ~ 557 2
2 IC 10 G 00 20 23.16 +59 17 34.7   13.6 9.5     ~ 984 0
3 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9141 1
4 NAME Pisces I G 01 03 56.6 +21 53 41   16.18 14.3     ~ 352 0
5 IC 1613 GiC 01 04 54.2 +02 08 00   10.42 10.01 9.77   ~ 1082 2
6 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5410 1
7 NGC 1569 IG 04 30 49.186 +64 50 52.52 11.72 11.86 11.03     ~ 1139 3
8 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14392 1
9 UGC 3860 G 07 28 17.724 +40 46 11.36   15.50       ~ 129 0
10 NGC 2366 H2G 07 28 51.85 +69 12 31.1 12.25 11.86 11.39 11.33   ~ 687 0
11 UGC 3966 G 07 41 25.777 +40 06 46.05   16.0       ~ 96 0
12 UGC 3974 G 07 41 56.3061361330 +16 48 07.439323443   15.4       ~ 197 0
13 UGC 4305 IG 08 19 04.9878269182 +70 43 13.025604473 12.06 11.72 11.39 11.11   ~ 673 2
14 NAME M 81 Dwarf A G 08 23 55.1 +71 01 56   16.5       ~ 184 1
15 UGC 4426 G 08 28 28.560 +41 51 27.13   18       ~ 125 0
16 UGC 4459 GiG 08 34 07.29 +66 10 54.6 15.39 15.03 14.70 14.49   ~ 285 2
17 LEDA 86668 LSB 09 02 53.357 +20 04 32.21   16.9       ~ 72 0
18 UGC 5139 LSB 09 40 32.33 +71 10 56.0 14.53 14.00 13.66 13.41   ~ 311 1
19 NAME Leo Dwarf Irregular Galaxy G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 537 0
20 NAME Sextans B H2G 10 00 00.8201300945 +05 20 09.572530884 12.77 12.25 11.89 11.71   ~ 454 0
21 NAME Sex A H2G 10 11 00.5 -04 41 30 12.48 12.13 11.93 11.78   ~ 639 2
22 UGC 5918 GiG 10 49 36.412 +65 32 01.07 15.55 15.27 14.79 14.55   ~ 121 0
23 UGC 6456 bCG 11 28 00.43 +78 59 38.4   14.50       ~ 301 1
24 Mrk 178 bCG 11 33 29.12 +49 14 17.4 14.69 14.61 14.25 14.17   ~ 209 1
25 NGC 3738 AGN 11 35 48.982 +54 31 24.70   12.12 12.04 11.56   ~ 240 0
26 UGC 6900 G 11 55 39.7065939676 +31 31 06.530347793   15.7       ~ 93 0
27 NGC 4163 LSB 12 12 09.108 +36 10 03.13 14.33 13.70 13.2 12.98   ~ 177 0
28 NGC 4228 SBG 12 15 39.174 +36 19 36.80 10.63 10.30 9.93 9.74   ~ 847 1
29 Mrk 209 bCG 12 26 16.02 +48 29 36.6   15.3       ~ 293 0
30 UGC 7559 GiP 12 27 05.566 +37 08 30.39   14.19   13.55   ~ 164 0
31 UGC 7698 GiC 12 32 53.771 +31 32 50.56   13.50   13.03   ~ 129 0
32 NAME CVn I dwA GiC 12 38 40.1 +32 45 59 16.91 16.66 16.73 16.62   ~ 188 0
33 UGC 7950 bCG 12 46 56.426 +51 36 46.80   14.1       ~ 90 0
34 UGC 8024 GiC 12 54 05.248 +27 08 58.67 14.37 14.23 13.95 13.84   ~ 522 1
35 UGC 8091 H2G 12 58 40.1930291852 +14 13 00.737117016 15.24 15.16 14.98 14.81   ~ 434 0
36 UGC 8201 G 13 06 24.85 +67 42 25.0 14.08 13.61 13.08 12.98   ~ 217 1
37 UGC 8308 G 13 13 22.839 +46 19 21.71   17       ~ 114 1
38 UGC 8320 G 13 14 27.997 +45 55 11.14 13.63 13.26 13.02 12.81   ~ 229 0
39 UGC 8508 G 13 30 44.8713405615 +54 54 38.531712530 14.72 14.25 13.90 13.75   ~ 158 0
40 UGC 9128 G 14 15 56.70 +23 03 16.2 15.40 14.77 14.41 14.32   ~ 250 0
41 NAME Sgr dIG G 19 29 59.0 -17 40 41   15.5 13.6     ~ 269 1
42 NAME Aquarius Dwarf G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 384 1
43 NAME Peg Dwarf Irregular Galaxy G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 408 1

    Equat.    Gal    SGal    Ecl

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2019.12.14-23:10:12

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