2000ApJ...533..682C


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.22CET21:34:03

2000ApJ...533..682C - Astrophys. J., 533, 682-695 (2000/April-3)

The dust content and opacity of actively star-forming galaxies.

CALZETTI D., ARMUS L., BOHLIN R.C., KINNEY A.L., KOORNNEEF J. and STORCHI-BERGMANN T.

Abstract (from CDS):

We present far-infrared (FIR) photometry at 150 and 205 µm of eight low-redshift starburst galaxies obtained with the Infrared Space Observatory (ISO) ISOPHOT. Five of the eight galaxies are detected in both wave bands, and these data are used, in conjunction with IRAS archival photometry, to model the dust emission at λ≳40 µm. The FIR spectral energy distributions (SEDs) are best fitted by a combination of two modified Planck functions, with T∼40-55 K (warm dust) and T∼20-23 K (cool dust) and with a dust emissivity index ε=2. The cool dust can be a major contributor to the FIR emission of starburst galaxies, representing up to 60% of the total flux. This component is heated not only by the general interstellar radiation field, but also by the starburst itself. The cool dust mass is up to ∼150 times larger than the warm dust mass, bringing the gas-to-dust ratios of the starbursts in our sample close to Milky Way values, once rescaled for the appropriate metallicity. The ratio between the total dust FIR emission in the range 1-1000 µm and the IRAS FIR emission in the range 40-120 µm is ∼1.75, with small variations from galaxy to galaxy. This ratio is about 40% larger than previously inferred from data at millimeter wavelengths. Although the galaxies in our sample are generally classified as ``UV bright'', for four of them the UV energy emerging shortward of 0.2 µm is less than 15% of the FIR energy. On average, about 30% of the bolometric flux is coming out in the UV-to-near-IR wavelength range; the rest is emitted in the FIR. Energy balance calculations show that the FIR emission predicted by the dust reddening of the UV-to-near-IR stellar emission is within a factor of ∼2 of the observed value in individual galaxies and within 20% when averaged over a large sample. If our sample of local starbursts is representative of high-redshift (z≳1), UV-bright, star-forming galaxies, these galaxies' FIR emission will be generally undetected in submillimeter surveys, unless (1) their bolometric luminosity is comparable to or larger than that of ultraluminous FIR galaxies and (2) their FIR SED contains a cool dust component.

Abstract Copyright:

Journal keyword(s): Galaxies: Starburst - Infrared: Galaxies - Infrared: ISM: Continuum - ISM: dust, extinction

Simbad objects: 15

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Number of rows : 15

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 1586 bCG 00 47 56.301 +22 22 22.51   15.0       ~ 68 0
2 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5410 6
3 NGC 4038 GiP 12 01 53.002 -18 52 03.32   10.91   9.74 11.0 ~ 1282 1
4 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1568 0
5 NGC 4039 GiP 12 01 53.8 -18 53 06   11.08   9.77   ~ 1135 1
6 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1296 2
7 Mrk 66 Sy2 13 25 53.813 +57 15 16.08   15.0       ~ 74 0
8 NGC 5860 EmG 15 06 33.73 +42 38 29.2   14.2       ~ 83 0
9 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2718 4
10 Mrk 487 bCG 15 37 04.237 +55 15 47.60   15.2       ~ 127 0
11 NGC 6090 PaG 16 11 40.3 +52 27 21   14.0       ~ 400 2
12 NGC 6240 Sy2 16 52 58.861 +02 24 03.55   14.31 13.37     ~ 1506 2
13 ESO 338-4 IG 19 27 58.338 -41 34 30.81   13.55 13.21 13.14 13.43 ~ 212 1
14 ESO 185-13 AGN 19 45 00.549 -54 15 02.91 14.77 14.94 14.68 14.49 14.19 ~ 46 0
15 NGC 7673 EmG 23 27 41.060 +23 35 20.18 12.84 13.17 12.76     ~ 264 1

    Equat.    Gal    SGal    Ecl

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