From the far-ultraviolet to the far-infrared - Galaxy emission at 0 ≤ z ≤ 10 in the SHARK semi-analytic model

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Abstract

We combine the SHARK semi-analytic model of galaxy formation with the PROSPECT software tool for spectral energy distribution (SED) generation to study the multiwavelength emission of galaxies from the far-ultraviolet (FUV) to the far-infrared (FIR) at 0 ≤ z ≤ 10. We produce a physical model for the attenuation of galaxies across cosmic time by combining a local Universe empirical relation to compute the dust mass of galaxies from their gas metallicity and mass, attenuation curves derived from radiative transfer calculations of galaxies in the EAGLE hydrodynamic simulation suite, and the properties of SHARK galaxies. We are able to produce a wide range of galaxies, from the z = 8 star-forming galaxies with almost no extinction, z = 2 submillimetre galaxies, down to the normal star-forming and red-sequence galaxies at z = 0. Quantitatively, we find that SHARK reproduces the observed (i) z = 0 FUV-to-FIR, (ii) 0 ≤ z ≤ 3 rest-frame K-band, and (iii) 0 ≤ z ≤ 10 rest-frame FUV luminosity functions, (iv) z ≤ 8 UV slopes, (v) the FUV-to-FIR number counts (including the widely disputed 850 μm), (vi) redshift distribution of bright 850 μm galaxies, and (vii) the integrated cosmic SED from z = 0 to 1 to an unprecedented level. This is achieved without the need to invoke changes in the stellar initial mass function, dust-to-metal mass ratio, or metal enrichment time-scales. Our model predicts star formation in galaxy discs to dominate in the FUV-to-optical, while bulges dominate at the NIR at all redshifts. The FIR sees a strong evolution in which discs dominate at z ≤ 1 and starbursts (triggered by both galaxy mergers and disc instabilities, in an even mix) dominate at higher redshifts, even out to z = 10.

Original languageEnglish
Pages (from-to)4196-4216
Number of pages21
JournalMonthly Notices of the Royal Astronomical Society
Volume489
Issue number3
DOIs
Publication statusPublished - 2 Sep 2019

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galaxies
dust
metal
merger
radiative transfer
energy
extinction
hydrodynamics
spectral energy distribution
timescale
software
attenuation
gas
stars
simulation
distribution
software development tools
disk galaxies
galactic evolution
extremely high frequencies

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@article{54ae5b73f0d040acb7d27144e80e35e6,
title = "From the far-ultraviolet to the far-infrared - Galaxy emission at 0 ≤ z ≤ 10 in the SHARK semi-analytic model",
abstract = "We combine the SHARK semi-analytic model of galaxy formation with the PROSPECT software tool for spectral energy distribution (SED) generation to study the multiwavelength emission of galaxies from the far-ultraviolet (FUV) to the far-infrared (FIR) at 0 ≤ z ≤ 10. We produce a physical model for the attenuation of galaxies across cosmic time by combining a local Universe empirical relation to compute the dust mass of galaxies from their gas metallicity and mass, attenuation curves derived from radiative transfer calculations of galaxies in the EAGLE hydrodynamic simulation suite, and the properties of SHARK galaxies. We are able to produce a wide range of galaxies, from the z = 8 star-forming galaxies with almost no extinction, z = 2 submillimetre galaxies, down to the normal star-forming and red-sequence galaxies at z = 0. Quantitatively, we find that SHARK reproduces the observed (i) z = 0 FUV-to-FIR, (ii) 0 ≤ z ≤ 3 rest-frame K-band, and (iii) 0 ≤ z ≤ 10 rest-frame FUV luminosity functions, (iv) z ≤ 8 UV slopes, (v) the FUV-to-FIR number counts (including the widely disputed 850 μm), (vi) redshift distribution of bright 850 μm galaxies, and (vii) the integrated cosmic SED from z = 0 to 1 to an unprecedented level. This is achieved without the need to invoke changes in the stellar initial mass function, dust-to-metal mass ratio, or metal enrichment time-scales. Our model predicts star formation in galaxy discs to dominate in the FUV-to-optical, while bulges dominate at the NIR at all redshifts. The FIR sees a strong evolution in which discs dominate at z ≤ 1 and starbursts (triggered by both galaxy mergers and disc instabilities, in an even mix) dominate at higher redshifts, even out to z = 10.",
keywords = "Galaxies: Evolution, Galaxies: Formation, Galaxies: Luminosity function, ISM: Dust, extinction",
author = "Lagos, {Claudia Del P.} and Robotham, {Aaron S.G.} and Trayford, {James W.} and Rodrigo Tobar and Mat{\'i}as Bravo and Sabine Bellstedt and Davies, {Luke J.M.} and Driver, {Simon P.} and Elahi, {Pascal J.} and Danail Obreschkow and Chris Power",
year = "2019",
month = "9",
day = "2",
doi = "10.1093/mnras/stz2427",
language = "English",
volume = "489",
pages = "4196--4216",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "OXFORD UNIV PRESS UNITED KINGDOM",
number = "3",

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TY - JOUR

T1 - From the far-ultraviolet to the far-infrared - Galaxy emission at 0 ≤ z ≤ 10 in the SHARK semi-analytic model

AU - Lagos, Claudia Del P.

AU - Robotham, Aaron S.G.

AU - Trayford, James W.

AU - Tobar, Rodrigo

AU - Bravo, Matías

AU - Bellstedt, Sabine

AU - Davies, Luke J.M.

AU - Driver, Simon P.

AU - Elahi, Pascal J.

AU - Obreschkow, Danail

AU - Power, Chris

PY - 2019/9/2

Y1 - 2019/9/2

N2 - We combine the SHARK semi-analytic model of galaxy formation with the PROSPECT software tool for spectral energy distribution (SED) generation to study the multiwavelength emission of galaxies from the far-ultraviolet (FUV) to the far-infrared (FIR) at 0 ≤ z ≤ 10. We produce a physical model for the attenuation of galaxies across cosmic time by combining a local Universe empirical relation to compute the dust mass of galaxies from their gas metallicity and mass, attenuation curves derived from radiative transfer calculations of galaxies in the EAGLE hydrodynamic simulation suite, and the properties of SHARK galaxies. We are able to produce a wide range of galaxies, from the z = 8 star-forming galaxies with almost no extinction, z = 2 submillimetre galaxies, down to the normal star-forming and red-sequence galaxies at z = 0. Quantitatively, we find that SHARK reproduces the observed (i) z = 0 FUV-to-FIR, (ii) 0 ≤ z ≤ 3 rest-frame K-band, and (iii) 0 ≤ z ≤ 10 rest-frame FUV luminosity functions, (iv) z ≤ 8 UV slopes, (v) the FUV-to-FIR number counts (including the widely disputed 850 μm), (vi) redshift distribution of bright 850 μm galaxies, and (vii) the integrated cosmic SED from z = 0 to 1 to an unprecedented level. This is achieved without the need to invoke changes in the stellar initial mass function, dust-to-metal mass ratio, or metal enrichment time-scales. Our model predicts star formation in galaxy discs to dominate in the FUV-to-optical, while bulges dominate at the NIR at all redshifts. The FIR sees a strong evolution in which discs dominate at z ≤ 1 and starbursts (triggered by both galaxy mergers and disc instabilities, in an even mix) dominate at higher redshifts, even out to z = 10.

AB - We combine the SHARK semi-analytic model of galaxy formation with the PROSPECT software tool for spectral energy distribution (SED) generation to study the multiwavelength emission of galaxies from the far-ultraviolet (FUV) to the far-infrared (FIR) at 0 ≤ z ≤ 10. We produce a physical model for the attenuation of galaxies across cosmic time by combining a local Universe empirical relation to compute the dust mass of galaxies from their gas metallicity and mass, attenuation curves derived from radiative transfer calculations of galaxies in the EAGLE hydrodynamic simulation suite, and the properties of SHARK galaxies. We are able to produce a wide range of galaxies, from the z = 8 star-forming galaxies with almost no extinction, z = 2 submillimetre galaxies, down to the normal star-forming and red-sequence galaxies at z = 0. Quantitatively, we find that SHARK reproduces the observed (i) z = 0 FUV-to-FIR, (ii) 0 ≤ z ≤ 3 rest-frame K-band, and (iii) 0 ≤ z ≤ 10 rest-frame FUV luminosity functions, (iv) z ≤ 8 UV slopes, (v) the FUV-to-FIR number counts (including the widely disputed 850 μm), (vi) redshift distribution of bright 850 μm galaxies, and (vii) the integrated cosmic SED from z = 0 to 1 to an unprecedented level. This is achieved without the need to invoke changes in the stellar initial mass function, dust-to-metal mass ratio, or metal enrichment time-scales. Our model predicts star formation in galaxy discs to dominate in the FUV-to-optical, while bulges dominate at the NIR at all redshifts. The FIR sees a strong evolution in which discs dominate at z ≤ 1 and starbursts (triggered by both galaxy mergers and disc instabilities, in an even mix) dominate at higher redshifts, even out to z = 10.

KW - Galaxies: Evolution

KW - Galaxies: Formation

KW - Galaxies: Luminosity function

KW - ISM: Dust, extinction

UR - http://www.scopus.com/inward/record.url?scp=85075162450&partnerID=8YFLogxK

U2 - 10.1093/mnras/stz2427

DO - 10.1093/mnras/stz2427

M3 - Article

VL - 489

SP - 4196

EP - 4216

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 3

ER -