2018MNRAS.477..552B


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.08CET08:41:37

2018MNRAS.477..552B - Mon. Not. R. Astron. Soc., 477, 552-565 (2018/June-2)

Dusty galaxies in the Epoch of Reionization: simulations.

BEHRENS C., PALLOTTINI A., FERRARA A., GALLERANI S. and VALLINI L.

Abstract (from CDS):

The recent discovery of dusty galaxies well into the Epoch of Reionization (redshift z > 6) poses challenging questions about the properties of the interstellar medium in these pristine systems. By combining state-of-the-art hydrodynamic and dust radiative transfer simulations, we address these questions focusing on the recently discovered dusty galaxy A2744_YD4 (z = 8.38, Laporte et al.). We show that we can reproduce the observed spectral energy distribution (SED) only using different physical values with respect to the inferred ones by Laporte et al., i.e. a star formation rate of SFR = 78 M yr–1, a factor ≃4 higher than deduced from simple SED fitting. In this case, we find: (i) dust attenuation (corresponding to τV = 1.4) is consistent with a Milky Way (MW) extinction curve; (ii) the dust-to-metal ratio is low, fd ∼ 0.08, implying that early dust formation is rather inefficient; (iii) the luminosity-weighted dust temperature is high, T_ d_=91±23 K, as a result of the intense (≃100 x MW) interstellar radiation field; and (iv) due to the high Td, the Atacama Large Millimeter/submillimeter Array Band 7 detection can be explained by a limited dust mass, Md = 1.6 x 106 M. Finally, the high dust temperatures might solve the puzzling low infrared excess (IRX) recently deduced for high-z galaxies from the IRX-β relation.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: numerical - dust, extinction - galaxies: evolution - galaxies: high-redshift - galaxies: ISM - infrared: general

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 ACO 2744 ClG 00 14 20.03 -30 23 17.8           ~ 544 0
2 [LFL2017] A2744 z8 130427 LeG 00 14 24.927 -30 22 56.15           ~ 26 0
3 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9131 1
4 [UHD2015] 218 EmG 09 58 28.52 +02 03 06.8 27.59 28.369 27.394 26.16 24.65 ~ 19 0
5 [CCJ2015b] HZ9 G 09 59 51.697 +02 22 42.16           ~ 15 0
6 [CRS2011] 1447524 G 10 00 21.504 +02 35 11.08           ~ 20 0
7 [MTS2007] 66 EmG 10 00 59.300 +01 33 19.60           ~ 21 0

    Equat.    Gal    SGal    Ecl

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2019.12.08-08:41:37

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