Mathematics – Logic
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21941106m&link_type=abstract
American Astronomical Society, AAS Meeting #219, #411.06
Mathematics
Logic
Scientific paper
We present our recent results on the evolution of the galaxy mass-size relation in different environments at z 1.3, for different morphological types and galaxy masses between 1010 MSun and 1011.5 MSun. We find that results on the evolution of the mass-size relation depend on how galaxies are morphologically selected (visually or by their Sersic index). When we select early-type galaxies (ETG) by visual morphology, the field mass-size relation does not show significant evolution from z 1.3 to the present (interestingly, in contrast from what is observed at higher masses). In clusters, the ETG mass-size relation at z 1.3 is shifted towards lower sizes on average. In the denser environment, either ETGs sizes have evolved on average to twice their size, or more ETGs have been formed from non ETG progenitors or larger galaxies have been accreted to a pristine compact population. The late-type mass-size relation does not show significant overall evolution in any environment.
Blakeslee John P.
Demarco Ricardo
Ford Holland C.
Holden Bradford P.
Huertas-Company Marc
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