MEASUREMENTS of EXTRAGALACTIC BACKGROUND LIGHT from the FAR UV to the FAR IR from DEEP GROUND- and SPACE-BASED GALAXY COUNTS

Simon P. Driver, Stephen K. Andrews, Luke J. Davies, Aaron S G Robotham, Angus H. Wright, Rogier Windhorst, Seth Cohen, Kim Emig, Rolf A. Jansen, Loretta Dunne

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

We combine wide and deep galaxy number-count data from the Galaxy And Mass Assembly, COSMOS/G10, Hubble Space Telescope (HST) Early Release Science, HST UVUDF, and various near-, mid-, and far-IR data sets from ESO, Spitzer, and Herschel. The combined data range from the far UV (0.15 μm) to far-IR (500 μm), and in all cases the contribution to the integrated galaxy light (IGL) of successively fainter galaxies converges. Using a simple spline fit, we derive the IGL and the extrapolated IGL in all bands. We argue that undetected low-surface-brightness galaxies and intracluster/group light are modest, and that our extrapolated-IGL measurements are an accurate representation of the extragalactic background light (EBL). Our data agree with most earlier IGL estimates and with direct measurements in the far IR, but disagree strongly with direct estimates in the optical. Close agreement between our results and recent very high-energy experiments (H.E.S.S. and MAGIC) suggests that there may be an additional foreground affecting the direct estimates. The most likely culprit could be the adopted model of zodiacal light. Finally we use a modified version of the two-component model to integrate the EBL and obtain measurements of the cosmic optical background (COB) and cosmic infrared background of nW m-2 sr-1 and nW m-2 sr-1 respectively (48%:52%). Over the next decade, upcoming space missions such as Euclid and the Wide Field Infrared Space Telescope will have the capacity to reduce the COB error to <1%, at which point comparisons to the very high-energy data could have the potential to provide a direct detection and measurement of the reionization field.

Original languageEnglish (US)
Article number108
JournalAstrophysical Journal
Volume827
Issue number2
DOIs
StatePublished - Aug 20 2016

Fingerprint

galaxies
Hubble Space Telescope
estimates
zodiacal light
space missions
splines
European Southern Observatory
energy
brightness
assembly
telescopes
experiment

Keywords

  • cosmic background radiation
  • cosmological parameters
  • diffuse radiation
  • galaxies: statistics
  • zodiacal dust

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

MEASUREMENTS of EXTRAGALACTIC BACKGROUND LIGHT from the FAR UV to the FAR IR from DEEP GROUND- and SPACE-BASED GALAXY COUNTS. / Driver, Simon P.; Andrews, Stephen K.; Davies, Luke J.; Robotham, Aaron S G; Wright, Angus H.; Windhorst, Rogier; Cohen, Seth; Emig, Kim; Jansen, Rolf A.; Dunne, Loretta.

In: Astrophysical Journal, Vol. 827, No. 2, 108, 20.08.2016.

Research output: Contribution to journalArticle

Driver, SP, Andrews, SK, Davies, LJ, Robotham, ASG, Wright, AH, Windhorst, R, Cohen, S, Emig, K, Jansen, RA & Dunne, L 2016, 'MEASUREMENTS of EXTRAGALACTIC BACKGROUND LIGHT from the FAR UV to the FAR IR from DEEP GROUND- and SPACE-BASED GALAXY COUNTS', Astrophysical Journal, vol. 827, no. 2, 108. https://doi.org/10.3847/0004-637X/827/2/108
Driver, Simon P. ; Andrews, Stephen K. ; Davies, Luke J. ; Robotham, Aaron S G ; Wright, Angus H. ; Windhorst, Rogier ; Cohen, Seth ; Emig, Kim ; Jansen, Rolf A. ; Dunne, Loretta. / MEASUREMENTS of EXTRAGALACTIC BACKGROUND LIGHT from the FAR UV to the FAR IR from DEEP GROUND- and SPACE-BASED GALAXY COUNTS. In: Astrophysical Journal. 2016 ; Vol. 827, No. 2.
@article{51b5ce854b664ab3afc0c3885cde7167,
title = "MEASUREMENTS of EXTRAGALACTIC BACKGROUND LIGHT from the FAR UV to the FAR IR from DEEP GROUND- and SPACE-BASED GALAXY COUNTS",
abstract = "We combine wide and deep galaxy number-count data from the Galaxy And Mass Assembly, COSMOS/G10, Hubble Space Telescope (HST) Early Release Science, HST UVUDF, and various near-, mid-, and far-IR data sets from ESO, Spitzer, and Herschel. The combined data range from the far UV (0.15 μm) to far-IR (500 μm), and in all cases the contribution to the integrated galaxy light (IGL) of successively fainter galaxies converges. Using a simple spline fit, we derive the IGL and the extrapolated IGL in all bands. We argue that undetected low-surface-brightness galaxies and intracluster/group light are modest, and that our extrapolated-IGL measurements are an accurate representation of the extragalactic background light (EBL). Our data agree with most earlier IGL estimates and with direct measurements in the far IR, but disagree strongly with direct estimates in the optical. Close agreement between our results and recent very high-energy experiments (H.E.S.S. and MAGIC) suggests that there may be an additional foreground affecting the direct estimates. The most likely culprit could be the adopted model of zodiacal light. Finally we use a modified version of the two-component model to integrate the EBL and obtain measurements of the cosmic optical background (COB) and cosmic infrared background of nW m-2 sr-1 and nW m-2 sr-1 respectively (48{\%}:52{\%}). Over the next decade, upcoming space missions such as Euclid and the Wide Field Infrared Space Telescope will have the capacity to reduce the COB error to <1{\%}, at which point comparisons to the very high-energy data could have the potential to provide a direct detection and measurement of the reionization field.",
keywords = "cosmic background radiation, cosmological parameters, diffuse radiation, galaxies: statistics, zodiacal dust",
author = "Driver, {Simon P.} and Andrews, {Stephen K.} and Davies, {Luke J.} and Robotham, {Aaron S G} and Wright, {Angus H.} and Rogier Windhorst and Seth Cohen and Kim Emig and Jansen, {Rolf A.} and Loretta Dunne",
year = "2016",
month = "8",
day = "20",
doi = "10.3847/0004-637X/827/2/108",
language = "English (US)",
volume = "827",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "2",

}

TY - JOUR

T1 - MEASUREMENTS of EXTRAGALACTIC BACKGROUND LIGHT from the FAR UV to the FAR IR from DEEP GROUND- and SPACE-BASED GALAXY COUNTS

AU - Driver, Simon P.

AU - Andrews, Stephen K.

AU - Davies, Luke J.

AU - Robotham, Aaron S G

AU - Wright, Angus H.

AU - Windhorst, Rogier

AU - Cohen, Seth

AU - Emig, Kim

AU - Jansen, Rolf A.

AU - Dunne, Loretta

PY - 2016/8/20

Y1 - 2016/8/20

N2 - We combine wide and deep galaxy number-count data from the Galaxy And Mass Assembly, COSMOS/G10, Hubble Space Telescope (HST) Early Release Science, HST UVUDF, and various near-, mid-, and far-IR data sets from ESO, Spitzer, and Herschel. The combined data range from the far UV (0.15 μm) to far-IR (500 μm), and in all cases the contribution to the integrated galaxy light (IGL) of successively fainter galaxies converges. Using a simple spline fit, we derive the IGL and the extrapolated IGL in all bands. We argue that undetected low-surface-brightness galaxies and intracluster/group light are modest, and that our extrapolated-IGL measurements are an accurate representation of the extragalactic background light (EBL). Our data agree with most earlier IGL estimates and with direct measurements in the far IR, but disagree strongly with direct estimates in the optical. Close agreement between our results and recent very high-energy experiments (H.E.S.S. and MAGIC) suggests that there may be an additional foreground affecting the direct estimates. The most likely culprit could be the adopted model of zodiacal light. Finally we use a modified version of the two-component model to integrate the EBL and obtain measurements of the cosmic optical background (COB) and cosmic infrared background of nW m-2 sr-1 and nW m-2 sr-1 respectively (48%:52%). Over the next decade, upcoming space missions such as Euclid and the Wide Field Infrared Space Telescope will have the capacity to reduce the COB error to <1%, at which point comparisons to the very high-energy data could have the potential to provide a direct detection and measurement of the reionization field.

AB - We combine wide and deep galaxy number-count data from the Galaxy And Mass Assembly, COSMOS/G10, Hubble Space Telescope (HST) Early Release Science, HST UVUDF, and various near-, mid-, and far-IR data sets from ESO, Spitzer, and Herschel. The combined data range from the far UV (0.15 μm) to far-IR (500 μm), and in all cases the contribution to the integrated galaxy light (IGL) of successively fainter galaxies converges. Using a simple spline fit, we derive the IGL and the extrapolated IGL in all bands. We argue that undetected low-surface-brightness galaxies and intracluster/group light are modest, and that our extrapolated-IGL measurements are an accurate representation of the extragalactic background light (EBL). Our data agree with most earlier IGL estimates and with direct measurements in the far IR, but disagree strongly with direct estimates in the optical. Close agreement between our results and recent very high-energy experiments (H.E.S.S. and MAGIC) suggests that there may be an additional foreground affecting the direct estimates. The most likely culprit could be the adopted model of zodiacal light. Finally we use a modified version of the two-component model to integrate the EBL and obtain measurements of the cosmic optical background (COB) and cosmic infrared background of nW m-2 sr-1 and nW m-2 sr-1 respectively (48%:52%). Over the next decade, upcoming space missions such as Euclid and the Wide Field Infrared Space Telescope will have the capacity to reduce the COB error to <1%, at which point comparisons to the very high-energy data could have the potential to provide a direct detection and measurement of the reionization field.

KW - cosmic background radiation

KW - cosmological parameters

KW - diffuse radiation

KW - galaxies: statistics

KW - zodiacal dust

UR - http://www.scopus.com/inward/record.url?scp=84984684878&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84984684878&partnerID=8YFLogxK

U2 - 10.3847/0004-637X/827/2/108

DO - 10.3847/0004-637X/827/2/108

M3 - Article

VL - 827

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 108

ER -