2003MNRAS.342..299C


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.18CEST10:54:05

2003MNRAS.342..299C - Mon. Not. R. Astron. Soc., 342, 299-313 (2003/June-2)

Dust-to-gas ratios in the starburst regions of luminous infrared galaxies.

CONTINI M. and CONTINI T.

Abstract (from CDS):

We investigate the properties of dust and dust-to-gas ratios in various starburst regions of luminous infrared galaxies (LIGs). We refer to the sample of seven LIGs recently observed in the mid-infrared by Soifer et al. using the Keck Telescope with spatial resolution approaching the diffraction limit. These seven objects are among the closest LIGs and have been classified as starburst galaxies from optical spectroscopy. Our goal consists in modelling the continuum spectral energy distribution of each galaxy, particularly in the infrared range. Models are further constrained by observed emission-line ratios in the optical range. Multicloud models consistently account for the coupled effects of shock, photoionization by hot stars and diffuse secondary radiation from the shock-heated gas. Emission from clouds in the neighbourhood of evolved starbursts and with high shock velocities (∼500 km.s–1) explains both the bremsstrahlung and reradiation from dust in the mid-infrared. Clouds with lower velocity (100 km.s–1), which correspond to younger starbursts, also contribute to both line and continuum spectra. Both low- and high-velocity clouds are thus present in nearly all the sample galaxies. For all the galaxies, an old stellar population is revealed by blackbody emission in the optical/near-infrared range. Dust-to-gas ratios vary in different regions of individual galaxies.

Abstract Copyright: 2003 RAS

Journal keyword(s): shock waves - galaxies: evolution - galaxies: ISM - galaxies: starburst - infrared: galaxies

Simbad objects: 14

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Number of rows : 14

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 1623 IG 01 07 47.2 -17 30 25   15       ~ 268 1
2 IC 1623A EmG 01 07 47.2 -17 30 28   14.34   12.71   ~ 45 2
3 IC 1623B rG 01 07 47.569 -17 30 25.04   15.04   14.07   ~ 61 1
4 NGC 1614 AGN 04 34 00.027 -08 34 44.57   14.66 13.99     ~ 614 0
5 NGC 2623 LIN 08 38 24.016 +25 45 16.29 14.10 13.99 13.36     ~ 447 1
6 IC 694 G 11 28 27.312 +58 34 42.29   18.2       ~ 240 2
7 NAME NGC 3690 West GiP 11 28 30.69 +58 33 33.4   11.8       ~ 614 4
8 NGC 3690 IG 11 28 31.326 +58 33 41.80   13.19 12.86     ~ 908 4
9 NAME NGC 3690 East AGN 11 28 33.07 +58 33 54.2   11.8       ~ 618 4
10 IC 883 SBG 13 20 35.380 +34 08 21.84   14.8       ~ 373 1
11 NGC 6090 PaG 16 11 40.3 +52 27 21   14.0       ~ 402 2
12 Mrk 331 GiP 23 51 26.731 +20 35 10.22   14.9       ~ 216 0
13 [KSG94] knot 2 PoG ~ ~           ~ 2 0
14 [KSG94] knot 4 PoG ~ ~           ~ 2 0

    Equat.    Gal    SGal    Ecl

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2021.04.18-10:54:05

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