2004A&A...416..499V


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.21CEST13:07:48

2004A&A...416..499V - Astronomy and Astrophysics, volume 416, 499-505 (2004/3-3)

HI holes in galactic disks: Tracing the dark matter distribution.

VOROBYOV E.I. and SHCHEKINOV Yu.A.

Abstract (from CDS):

Multiple SN explosions in disk galaxies efficiently evacuate gas and form cavities with the sizes and shapes of the surrounding envelopes determined by the total amount of injected energy and by the initial gas distribution. Such cavities are seen as HI holes when observed in face-on galaxies. Gas hydrodynamics simulations are performed to obtain the quantitative characteristics of HI holes that could serve for the determination of the gas vertical scale height and the corresponding dark matter content and its distribution. Among these characteristics is the ratio of the maximum column density in the HI ring surrounding the hole to the background HI column density and the vertical expansion velocity of gas in the HI ring. We show that in some cases the extragalactic background ionizing radiation may produce HI holes in the outer regions of galaxies, and can account for the existence of HI holes in nearby face-on galaxies with the apparent lack of an underlying stellar population.

Abstract Copyright:

Journal keyword(s): ISM: supernova remnants - ISM: bubbles

Simbad objects: 13

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Number of rows : 13

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 IC 10 G 00 20 23.16 +59 17 34.7   13.6 9.5     ~ 1015 0
2 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11051 1
3 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 2954 2
4 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9556 1
5 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5191 1
6 NGC 891 H2G 02 22 32.907 +42 20 53.95 11.08 10.81 9.93 7.86   ~ 1534 2
7 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14988 1
8 UGC 4305 IG 08 19 04.9878269182 +70 43 13.025604473 12.06 11.72 11.39 11.11   ~ 700 2
9 UGC 5139 LSB 09 40 32.33 +71 10 56.0 14.53 14.00 13.66 13.41   ~ 325 1
10 IC 2574 G 10 28 23.6204574649 +68 24 43.441365350 11.70 11.07 10.87 10.74   ~ 610 1
11 NGC 4631 GiP 12 42 08.009 +32 32 29.44   9.78 9.19 9.10   ~ 978 2
12 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2576 2
13 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2259 2

    Equat.    Gal    SGal    Ecl

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2020.10.21-13:07:48

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