2001A&A...373..485D


Query : 2001A&A...373..485D

2001A&A...373..485D - Astronomy and Astrophysics, volume 373, 485-493 (2001/7-2)

A search for intergalactic HI gas in the NGC 1808 group of galaxies.

DAHLEM M., EHLE M. and RYDER S.D.

Abstract (from CDS):

A mosaic of six HI line observations with the Australia Telescope Compact Array is used to search for intergalactic gas in the NGC 1808 group of galaxies. Within the field of view of about 1.4degx1.2deg no emission from intergalactic HI gas is detected, either in the form of tidal plumes or tails, intergalactic HI clouds, or as gas associated with tidal dwarf galaxies, with a 5σ limiting sensitivity of about 3x1018cm–2 (or 1.4x107M at a distance of 10.9 Mpc, for the given beam size of 127.9"x77.3"). The HI data of NGC 1792 and NGC 1808, with a velocity resolution of 6.6km/s, confirm the results of earlier VLA observations. Simultaneous wide-band 1.34GHz continuum observations also corroborate the results of earlier studies. However, the continuum flux of NGC 1808 measured by us is almost 20% higher than reported previously. No radio continuum emission was detected from the type Ia supernova SN 1993af in the north-eastern spiral arm of NGC1808. A comparison of NGC 1792 and NGC 1808 shows that it is not primarily the total energy input that makes the big difference between the starburst-related outflow in NGC 1808 and the absence of such extraplanar features in NGC 1792, but the area over which the energy released by stellar winds and supernovae is injected into the ISM.

Abstract Copyright:

Journal keyword(s): galaxies: individual: NGC 1792, NGC 1808 - galaxies: general - galaxies: ISM - galaxies: interactions - intergalactic medium

Simbad objects: 10

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Number of rows : 10
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 NGC 1792 EmG 05 05 14.454 -37 58 50.70   10.68 10.18 9.53 10.4 ~ 204 1
2 NGC 1808 Sy2 05 07 42.343 -37 30 46.98 11.05 10.80 9.94 9.36 10.2 ~ 670 3
3 SN 1993af SN* 05 08 00.71 -37 29 18.0     17     SNIa 17 1
4 ESO 305-9 G 05 08 07.62 -38 18 33.5   13.08   13.3 13.2 ~ 62 0
5 NAME NGC 1808 Group GrG 05 08 10.8 -37 42 18           ~ 22 0
6 QSO B0537-441 BLL 05 38 50.36155219 -44 05 08.9389165   15.77 16.48 16   ~ 815 2
7 NGC 3175 EmG 10 14 42.111 -28 52 19.42   12.14   11.7 11.2 ~ 90 0
8 NGC 3628 GiP 11 20 17.018 +13 35 22.16   10.42 9.48 9.22   ~ 774 3
9 NGC 4631 GiP 12 42 08.009 +32 32 29.44   9.78 9.19 9.10   ~ 999 2
10 ICRF J193925.0-634245 Sy2 19 39 25.02671 -63 42 45.6255   18.87 18.37 17.64   ~ 1038 1

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2021.09.28-11:36:09

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