2003ApJ...587..533V


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.05CEST06:29:55

2003ApJ...587..533V - Astrophys. J., 587, 533-543 (2003/April-3)

The dust in Lyman break galaxies.

VIJH U.P., WITT A.N. and GORDON K.D.

Abstract (from CDS):

We present our analysis of UV attenuation by internal dust of a large sample (N=906 galaxies) of Lyman break galaxies (LBGs). Using spectral energy distributions (SEDs) from the PÉGASE galaxy spectral evolution model, we apply dust attenuation corrections to the G-R colors, using the Witt & Gordon models for radiative transfer in dusty galactic environments to arrive at the UV attenuation factors. We show that the dust in the LBGs exhibits SMC-like rather than Milky Way-like characteristics and that the dust geometry in these systems is most likely to be represented by a clumpy shell configuration. We show that the attenuation factor exhibits a pronounced dependence on the luminosity of the LBG, a1600∝(L/L)α, where 0.5≤α≤1.5. The exponent α depends on the initial parameters of the stellar population chosen to model the galaxies and the dust properties. We find that the luminosity-weighted average attenuation factor is likely to be in the range from 5.7 to 18.5, which is consistent with the upper limits to the star formation rate at 2<z<4 set by the far-infrared background. This implies that the current UV/optical surveys do detect the bulk of the star formation during the epoch 2<z<4 but require substantial correction for internal dust attenuation.

Abstract Copyright:

Journal keyword(s): ISM: Dust, Extinction - Galaxies: High-Redshift - Galaxies: ISM - ISM: Evolution

Simbad objects: 7

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Number of rows : 7

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 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10902 1
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9440 1
3 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5134 1
4 NGC 604 HII 01 34 32.1 +30 47 01           ~ 544 0
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14826 1
6 NAME 30 Dor Nebula SFR 05 38 36.0 -69 05 11           ~ 1039 2
7 NAME Hubble Deep Field reg 12 36 49.5 +62 12 58           ~ 1825 1

    Equat.    Gal    SGal    Ecl

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2020.07.05-06:29:56

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