Using the 1.6 [micron]m bump to study rest-frame near-infrared-selected galaxies at redshift 2

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dc.creator Sorba, Robert
dc.creator Sawicki, Marcin, 1969-
dc.date.accessioned 2015-10-09T14:10:15Z
dc.date.available 2015-10-09T14:10:15Z
dc.date.issued 2010-10-01
dc.identifier.issn 0004-637X
dc.identifier.uri http://library2.smu.ca/xmlui/handle/01/26414
dc.description Publisher's version/PDF en_CA
dc.description.abstract We explore the feasibility and limitations of using the 1.6 [micron]m bump as a photometric redshift indicator and selection technique, and use it to study the rest-frame H-band galaxy luminosity and stellar mass functions (SMFs) at redshift z ∼ 2. We use publicly available Spitzer/IRAC images in the GOODS fields and find that color selection in the IRAC bandpasses alone is comparable in completeness and contamination to BzK selection.We find that the shape of the 1.6 [micron]m bump is robust, and photometric redshifts are not greatly affected by choice of model parameters. Comparison with spectroscopic redshifts shows photometric redshifts to be reliable. We create a rest-frame NIR-selected catalog of galaxies at z ∼ 2 and construct a galaxy SMF. Comparisons with other SMFs at approximately the same redshift but determined using shorter wavelengths show good agreement. This agreement suggests that selection at bluer wavelengths does not miss a significant amount of stellar mass in passive galaxies. Comparison with SMFs at other redshifts shows evidence for the downsizing scenario of galaxy evolution. We conclude by pointing out the potential for using the 1.6 [micron]m bump technique to select high-redshift galaxies with the JWST, whose [lambda] > 0.6 [micron]m coverage will not be well suited to selecting galaxies using techniques that require imaging at shorter wavelengths. en_CA
dc.language.iso en en_CA
dc.publisher American Astronomical Society en_CA
dc.publisher IOP Publishing
dc.relation.uri http://dx.doi.org/10.1088/0004-637X/721/2/1056
dc.rights Article is made available in accordance with the publisher’s policy and is subject to copyright law. Please refer to the publisher’s site. Any re-use of this article is to be in accordance with the publisher’s copyright policy. This posting is in no way granting any permission for re-use to the reader/user.
dc.subject.lcsh Galaxies
dc.subject.lcsh Galaxies -- Evolution
dc.subject.lcsh Galaxies -- Formation
dc.subject.lcsh Red shift
dc.subject.lcsh Astronomical photometry
dc.title Using the 1.6 [micron]m bump to study rest-frame near-infrared-selected galaxies at redshift 2 en_CA
dc.type Text en_CA
dcterms.bibliographicCitation Astrophysical Journal 721(2), 1056-1078. (2010) en_CA


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Article is made available in accordance with the publisher’s policy and is subject to copyright law. Please refer to the publisher’s site. Any re-use of this article is to be in accordance with the publisher’s copyright policy. This posting is in no way granting any permission for re-use to the reader/user.
 
Published Version: http://dx.doi.org/10.1088/0004-637X/721/2/1056
 
 

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