Red nuggets at high Redshift : structural evolution of quiescent galaxies over 10 Gyr of cosmic history

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DOIResolve DOI: http://doi.org/10.1088/2041-8205/739/2/L44
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TypeArticle
Journal titleThe Astrophysical Journal Letters
ISSN2041-8205
Volume739
Issue2
PagesL44-1L44-6; # of pages: 6
Subjectgalaxies: elliptical and lenticular, cD; galaxies: evolution; galaxies: fundamental parameters
AbstractWe present an analysis of the size growth seen in early-type galaxies over 10 Gyr of cosmic time. Our analysis is based on a homogeneous synthesis of published data from 16 spectroscopic surveys observed at similar spatial resolution, augmented by new measurements for galaxies in the Gemini Deep Deep Survey. In total, our sample contains structural data for 465 galaxies (mainly early-type) in the redshift range 0.2 < z < 2.7. The size evolution of passively evolving galaxies over this redshift range is gradual and continuous, with no evidence for an end or change to the process around z ~ 1, as has been hinted at by some surveys which analyze subsets of the data in isolation. The size growth appears to be independent of stellar mass, with the mass-normalized half-light radius scaling with redshift as Re (1 + z)⁻¹·⁶² ± º·³⁴. Surprisingly, this power law seems to be in good agreement with the recently reported continuous size evolution of UV-bright galaxies in the redshift range z ~ 0.5-3.5. It is also in accordance with the predictions from recent theoretical models.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Herzberg Institute of Astrophysics
Peer reviewedYes
NPARC number19809251
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Record identifier416436fb-81db-4c50-85d7-03591e5dbacd
Record created2012-04-13
Record modified2016-05-09
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