Galaxy And Mass Assembly: The evolution of the cosmic spectral energy distribution from z = 1 to z = 0

S. K. Andrews, S. P. Driver, L. J.M. Davies, P. R. Kafle, A. S.G. Robotham, K. Vinsen, A. H. Wright, J. Bland-Hawthorn, N. Bourne, M. Bremer, E. Da Cunha, M. Drinkwater, B. W. Holwerda, A. M. Hopkins, L. S. Kelvin, J. Loveday, S. Phillipps, S. Wilkins

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Abstract

We present the evolution of the cosmic spectral energy distribution (CSED) from z = 1 to 0. Our CSEDs originate from stacking individual spectral energy distribution (SED) fits based on panchromatic photometry from the Galaxy And Mass Assembly (GAMA) and COSMOS data sets in 10 redshift intervals with completeness corrections applied. Below z = 0.45, we have credible SED fits from 100 nm to 1 mm. Due to the relatively low sensitivity of the far-infrared data, our far-infrared CSEDs contain a mix of predicted and measured fluxes above z = 0.45. Our results include appropriate errors to highlight the impact of these corrections. We show that the bolometric energy output of the Universe has declined by a factor of roughly 4 - from 5.1 ± 1.0 at z ∼ 1 to 1.3 ± 0.3 × 1035 h70 W Mpc-3 at the current epoch. We show that this decrease is robust to cosmic sample variance, the SED modelling and other various types of error. Our CSEDs are also consistent with an increase in the mean age of stellar populations. We also show that dust attenuation has decreased over the same period, with the photon escape fraction at 150 nm increasing from 16 ± 3 at z ∼ 1 to 24 ± 5 per cent at the current epoch, equivalent to a decrease in AFUV of 0.4 mag. Our CSEDs account for 68 ± 12 and 61 ± 13 per cent of the cosmic optical and infrared backgrounds, respectively, as defined from integrated galaxy counts and are consistent with previous estimates of the cosmic infrared background with redshift.

LanguageEnglish
Article numberstx1279
Pages1342-1359
Number of pages18
JournalMonthly Notices of the Royal Astronomical Society
Volume470
Issue number2
DOIs
StatePublished - 11 Sep 2017

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spectral energy distribution
assembly
galaxies
energy
time measurement
completeness
escape
photometry
stacking
universe
dust
attenuation
intervals
distribution
output
sensitivity
photons
estimates
modeling

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Andrews, S. K. ; Driver, S. P. ; Davies, L. J.M. ; Kafle, P. R. ; Robotham, A. S.G. ; Vinsen, K. ; Wright, A. H. ; Bland-Hawthorn, J. ; Bourne, N. ; Bremer, M. ; Da Cunha, E. ; Drinkwater, M. ; Holwerda, B. W. ; Hopkins, A. M. ; Kelvin, L. S. ; Loveday, J. ; Phillipps, S. ; Wilkins, S./ Galaxy And Mass Assembly : The evolution of the cosmic spectral energy distribution from z = 1 to z = 0. In: Monthly Notices of the Royal Astronomical Society. 2017 ; Vol. 470, No. 2. pp. 1342-1359
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title = "Galaxy And Mass Assembly: The evolution of the cosmic spectral energy distribution from z = 1 to z = 0",
abstract = "We present the evolution of the cosmic spectral energy distribution (CSED) from z = 1 to 0. Our CSEDs originate from stacking individual spectral energy distribution (SED) fits based on panchromatic photometry from the Galaxy And Mass Assembly (GAMA) and COSMOS data sets in 10 redshift intervals with completeness corrections applied. Below z = 0.45, we have credible SED fits from 100 nm to 1 mm. Due to the relatively low sensitivity of the far-infrared data, our far-infrared CSEDs contain a mix of predicted and measured fluxes above z = 0.45. Our results include appropriate errors to highlight the impact of these corrections. We show that the bolometric energy output of the Universe has declined by a factor of roughly 4 - from 5.1 ± 1.0 at z ∼ 1 to 1.3 ± 0.3 × 1035 h70 W Mpc-3 at the current epoch. We show that this decrease is robust to cosmic sample variance, the SED modelling and other various types of error. Our CSEDs are also consistent with an increase in the mean age of stellar populations. We also show that dust attenuation has decreased over the same period, with the photon escape fraction at 150 nm increasing from 16 ± 3 at z ∼ 1 to 24 ± 5 per cent at the current epoch, equivalent to a decrease in AFUV of 0.4 mag. Our CSEDs account for 68 ± 12 and 61 ± 13 per cent of the cosmic optical and infrared backgrounds, respectively, as defined from integrated galaxy counts and are consistent with previous estimates of the cosmic infrared background with redshift.",
keywords = "Cosmic background radiation, Cosmology: observations, Galaxies: evolution, Galaxies: general",
author = "Andrews, {S. K.} and Driver, {S. P.} and Davies, {L. J.M.} and Kafle, {P. R.} and Robotham, {A. S.G.} and K. Vinsen and Wright, {A. H.} and J. Bland-Hawthorn and N. Bourne and M. Bremer and {Da Cunha}, E. and M. Drinkwater and Holwerda, {B. W.} and Hopkins, {A. M.} and Kelvin, {L. S.} and J. Loveday and S. Phillipps and S. Wilkins",
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Andrews, SK, Driver, SP, Davies, LJM, Kafle, PR, Robotham, ASG, Vinsen, K, Wright, AH, Bland-Hawthorn, J, Bourne, N, Bremer, M, Da Cunha, E, Drinkwater, M, Holwerda, BW, Hopkins, AM, Kelvin, LS, Loveday, J, Phillipps, S & Wilkins, S 2017, 'Galaxy And Mass Assembly: The evolution of the cosmic spectral energy distribution from z = 1 to z = 0' Monthly Notices of the Royal Astronomical Society, vol 470, no. 2, stx1279, pp. 1342-1359. DOI: 10.1093/mnras/stx1279

Galaxy And Mass Assembly : The evolution of the cosmic spectral energy distribution from z = 1 to z = 0. / Andrews, S. K.; Driver, S. P.; Davies, L. J.M.; Kafle, P. R.; Robotham, A. S.G.; Vinsen, K.; Wright, A. H.; Bland-Hawthorn, J.; Bourne, N.; Bremer, M.; Da Cunha, E.; Drinkwater, M.; Holwerda, B. W.; Hopkins, A. M.; Kelvin, L. S.; Loveday, J.; Phillipps, S.; Wilkins, S.

In: Monthly Notices of the Royal Astronomical Society, Vol. 470, No. 2, stx1279, 11.09.2017, p. 1342-1359.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Galaxy And Mass Assembly

T2 - Monthly Notices of the Royal Astronomical Society

AU - Andrews,S. K.

AU - Driver,S. P.

AU - Davies,L. J.M.

AU - Kafle,P. R.

AU - Robotham,A. S.G.

AU - Vinsen,K.

AU - Wright,A. H.

AU - Bland-Hawthorn,J.

AU - Bourne,N.

AU - Bremer,M.

AU - Da Cunha,E.

AU - Drinkwater,M.

AU - Holwerda,B. W.

AU - Hopkins,A. M.

AU - Kelvin,L. S.

AU - Loveday,J.

AU - Phillipps,S.

AU - Wilkins,S.

PY - 2017/9/11

Y1 - 2017/9/11

N2 - We present the evolution of the cosmic spectral energy distribution (CSED) from z = 1 to 0. Our CSEDs originate from stacking individual spectral energy distribution (SED) fits based on panchromatic photometry from the Galaxy And Mass Assembly (GAMA) and COSMOS data sets in 10 redshift intervals with completeness corrections applied. Below z = 0.45, we have credible SED fits from 100 nm to 1 mm. Due to the relatively low sensitivity of the far-infrared data, our far-infrared CSEDs contain a mix of predicted and measured fluxes above z = 0.45. Our results include appropriate errors to highlight the impact of these corrections. We show that the bolometric energy output of the Universe has declined by a factor of roughly 4 - from 5.1 ± 1.0 at z ∼ 1 to 1.3 ± 0.3 × 1035 h70 W Mpc-3 at the current epoch. We show that this decrease is robust to cosmic sample variance, the SED modelling and other various types of error. Our CSEDs are also consistent with an increase in the mean age of stellar populations. We also show that dust attenuation has decreased over the same period, with the photon escape fraction at 150 nm increasing from 16 ± 3 at z ∼ 1 to 24 ± 5 per cent at the current epoch, equivalent to a decrease in AFUV of 0.4 mag. Our CSEDs account for 68 ± 12 and 61 ± 13 per cent of the cosmic optical and infrared backgrounds, respectively, as defined from integrated galaxy counts and are consistent with previous estimates of the cosmic infrared background with redshift.

AB - We present the evolution of the cosmic spectral energy distribution (CSED) from z = 1 to 0. Our CSEDs originate from stacking individual spectral energy distribution (SED) fits based on panchromatic photometry from the Galaxy And Mass Assembly (GAMA) and COSMOS data sets in 10 redshift intervals with completeness corrections applied. Below z = 0.45, we have credible SED fits from 100 nm to 1 mm. Due to the relatively low sensitivity of the far-infrared data, our far-infrared CSEDs contain a mix of predicted and measured fluxes above z = 0.45. Our results include appropriate errors to highlight the impact of these corrections. We show that the bolometric energy output of the Universe has declined by a factor of roughly 4 - from 5.1 ± 1.0 at z ∼ 1 to 1.3 ± 0.3 × 1035 h70 W Mpc-3 at the current epoch. We show that this decrease is robust to cosmic sample variance, the SED modelling and other various types of error. Our CSEDs are also consistent with an increase in the mean age of stellar populations. We also show that dust attenuation has decreased over the same period, with the photon escape fraction at 150 nm increasing from 16 ± 3 at z ∼ 1 to 24 ± 5 per cent at the current epoch, equivalent to a decrease in AFUV of 0.4 mag. Our CSEDs account for 68 ± 12 and 61 ± 13 per cent of the cosmic optical and infrared backgrounds, respectively, as defined from integrated galaxy counts and are consistent with previous estimates of the cosmic infrared background with redshift.

KW - Cosmic background radiation

KW - Cosmology: observations

KW - Galaxies: evolution

KW - Galaxies: general

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U2 - 10.1093/mnras/stx1279

DO - 10.1093/mnras/stx1279

M3 - Article

VL - 470

SP - 1342

EP - 1359

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

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