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On the effect of the cosmic microwave background in high-redshift (SUB-)millimeter observations

da Cunha, Elisabete; Groves, Brent Allan; Walter, Fabian; Decarli, Roberto; Weiss, A; Bertoldi, Frank; Carilli, C L; Daddi, E; Elbaz, David; Ivison, Robert J; Maiolino, Roberto; Riechers, Dominik; Rix, Hans-Walter; Sargent, Mark; Smail, Ian

Description

Modern (sub-)millimeter interferometers enable the measurement of the cool gas and dust emission of high-redshift galaxies (z > 5). However, at these redshifts the cosmic microwave background (CMB) temperature is higher, approaching, and even exceeding, the temperature of cold dust and molecular gas observed in the local universe. In this paper, we discuss the impact of the warmer CMB on (sub-)millimeter observations of high-redshift galaxies. The CMB affects the observed (sub-)millimeter dust...[Show more]

dc.contributor.authorda Cunha, Elisabete
dc.contributor.authorGroves, Brent Allan
dc.contributor.authorWalter, Fabian
dc.contributor.authorDecarli, Roberto
dc.contributor.authorWeiss, A
dc.contributor.authorBertoldi, Frank
dc.contributor.authorCarilli, C L
dc.contributor.authorDaddi, E
dc.contributor.authorElbaz, David
dc.contributor.authorIvison, Robert J
dc.contributor.authorMaiolino, Roberto
dc.contributor.authorRiechers, Dominik
dc.contributor.authorRix, Hans-Walter
dc.contributor.authorSargent, Mark
dc.contributor.authorSmail, Ian
dc.date.accessioned2018-11-29T22:52:33Z
dc.date.available2018-11-29T22:52:33Z
dc.identifier.issn0004-637X
dc.identifier.urihttp://hdl.handle.net/1885/152214
dc.description.abstractModern (sub-)millimeter interferometers enable the measurement of the cool gas and dust emission of high-redshift galaxies (z > 5). However, at these redshifts the cosmic microwave background (CMB) temperature is higher, approaching, and even exceeding, the temperature of cold dust and molecular gas observed in the local universe. In this paper, we discuss the impact of the warmer CMB on (sub-)millimeter observations of high-redshift galaxies. The CMB affects the observed (sub-)millimeter dust continuum and the line emission (e.g., carbon monoxide, CO) in two ways: (1) it provides an additional source of (both dust and gas) heating and (2) it is a non-negligible background against which the line and continuum emission are measured. We show that these two competing processes affect the way we interpret the dust and gas properties of high-redshift galaxies using spectral energy distributionmodels.We quantify these effects and provide correction factors to computewhat fraction of the intrinsic dust (and line) emission can be detected against the CMB as a function of frequency, redshift, and temperature.We discuss implications on the derived properties of high-redshift galaxies from (sub-)millimeter data. Specifically, the inferred dust and molecular gas masses can be severely underestimated for cold systems if the impact of the CMB is not properly taken into account.
dc.format.mimetypeapplication/pdf
dc.publisherIOP Publishing
dc.sourceThe Astrophysical Journal
dc.subjectKeywords: galaxies: evolution; galaxies: ISM; submillimeter: galaxies
dc.titleOn the effect of the cosmic microwave background in high-redshift (SUB-)millimeter observations
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume766
dc.date.issued2013
local.identifier.absfor020100 - ASTRONOMICAL AND SPACE SCIENCES
local.identifier.ariespublicationU3488905xPUB17725
local.type.statusPublished Version
local.contributor.affiliationda Cunha, Elisabete, College of Science, ANU
local.contributor.affiliationGroves, Brent Allan, College of Science, ANU
local.contributor.affiliationWalter, Fabian, Max Planck Institute for Astronomy
local.contributor.affiliationDecarli, Roberto, Max-Planck Institut fur Astronomie
local.contributor.affiliationWeiss, A, Max-Planck Institut für Radioastronomie
local.contributor.affiliationBertoldi, Frank, Argelander Institute for Astronomy
local.contributor.affiliationCarilli, C L, National Radio Astronomy Observatory
local.contributor.affiliationDaddi, E, CEA-Saclay
local.contributor.affiliationElbaz, David, Royal Observatory
local.contributor.affiliationIvison, Robert J, Royal Observatory Edinburgh
local.contributor.affiliationMaiolino, Roberto, University of Cambridge
local.contributor.affiliationRiechers, Dominik, Cornell University
local.contributor.affiliationRix, Hans-Walter, Max Planck Institute for Astronomy
local.contributor.affiliationSargent, Mark, CEA/DSM-CNRS-Universite Paris Diderot
local.contributor.affiliationSmail, Ian, Durham University
local.bibliographicCitation.issue1
local.identifier.doi10.1088/0004-637X/766/1/13
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
dc.date.updated2018-11-29T07:47:00Z
local.identifier.scopusID2-s2.0-84875034647
local.identifier.thomsonID000316054000013
dcterms.accessRightsOpen Access
CollectionsANU Research Publications

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