Star-forming and passive galaxies at z ~ 2 in the CFHT Legacy Survey

Show simple item record

dc.contributor.advisor Sawicki, Marcin, 1969-
dc.creator Arcila-Osejo, Liz María 2012-07-04T19:16:36Z 2012-07-04T19:16:36Z 2011
dc.identifier.other QB857.5 E96 A73 2011
dc.description viii, 68 leaves : ill. ; 29 cm. en_CA
dc.description Includes abstract.
dc.description Includes bibliographical references (leaves 66-68).
dc.description.abstract In this work we use the latest results from the four Deep Fields of the Canada France Hawaii Telescope Legacy Survey (CFHTLS) combined with the WIRCam Deep Survey (WIRDs) covering 2 .51 deg [superscript 2] to study the number counts and luminosity functions of z ∼ 2 star-forming and passive galaxies to K[subscript s]<23. To construct our catalogs, we used an adaptation of the BzK[subscript s] selection criteria to the available filters of the CFHTLS: The gzK[subscript s] color-color plot combined with a new infrared zJHK[subscript s] color selection allows us to discriminate between star-forming and passive galaxies at z ∼ 2. We build number counts and luminosity functions for these two different populations in each Deep Field and average fields. Our luminosity function for passive galaxies exhibits a flattening and a possible turnover at K[subscript s] ∼ 22. This turnover is clear in some of the Deep fields but not in all of them and this could imply that this turnover is not universal. From this observation, we conclude that the passive galaxy population at z ∼ 2 is dominated by intermediate-mass objects. Our results are consistent with the downsizing scenario of galaxy evolution in which the most massive systems stop star-formation before less massive ones. en_CA
dc.description.provenance Submitted by Dianne MacPhee ( on 2012-07-04T19:16:36Z No. of bitstreams: 0 en
dc.description.provenance Made available in DSpace on 2012-07-04T19:16:36Z (GMT). No. of bitstreams: 0 Previous issue date: 2011 en
dc.language.iso en en_CA
dc.publisher Halifax, N.S. : Saint Mary's University en_CA
dc.subject.lcc QB857.5.E96
dc.subject.lcsh Galaxies -- Evolution
dc.subject.lcsh Galaxies -- Formation
dc.title Star-forming and passive galaxies at z ~ 2 in the CFHT Legacy Survey en_CA
dc.type Text en_CA Master of Science in Astronomy Masters Astronomy and Physics Saint Mary's University (Halifax, N.S.)
 Find Full text

Files in this item


This item appears in the following Collection(s)

Show simple item record

Search DSpace


My Account