The Sizes of Passively Evolving Galaxies in the CANDELS Fields

Details The Sizes of Passively Evolving Galaxies in the CANDELS Fields The Sizes of Passively Evolving Galaxies in the CANDELS Fields

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21924627r&link_type=abstract

American Astronomical Society, AAS Meeting #219, #246.27

Astronomy and Astrophysics

Astronomy

Scientific paper

A report on the size-mass evolution of passively evolving galaxies at z 2, which were selected based on their optical/infrared colors from the CANDELS data. We determine effective radii and Sersic indices using our graphical front-end to GALFIT, which can fit, mask, and modify objects in a fully interactive fashion. We present these structural parameters for the various optical and infrared bands observed by the Hubble Space Telescope. By fitting the observed optical and infrared photometry, we estimate stellar population parameters (such as stellar mass, age, and star formation rate) using a Markov Chain Monte Carlo procedure, which allows for robust estimate of the parameter (co-)variances. We discuss these results in the context of the recently proposed stellar mass-dependent size evolution model.

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