The Bivariate Size-luminosity Distribution Of Z 4-5 LBGs In The Goods Fields

Details The Bivariate Size-luminosity Distribution Of Z 4-5 LBGs In The Goods Fields The Bivariate Size-luminosity Distribution Of Z 4-5 LBGs In The Goods Fields

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21832808h&link_type=abstract

American Astronomical Society, AAS Meeting #218, #328.08; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

We study the bivariate size-luminosity distribution of z 4 and z 5 Lyman Break Galaxies (LBG) in the GOODS fields. Our sample was selected using the Lyman Break color selection criteria in order to select rest-frame UV-bright star forming galaxies. We selected around 1250 B-dropouts (z 4) and 370 V-dropouts (z 5) in both GOODS fields and the HUDF field, down to ACS F850LP magnitude z_{850} = 26.5 (GOODS ACS dataset) and z_{850}=28.0 (HUDF dataset). We model the size distribution as a lognormal distribution and the luminosity function in the Schechter function form, and connect them with a power law relation between the peak size r_0 and the absolute magnitude M, r_0 = r*(M/M*)^{β}. Galaxy magnitude and size are measured first with SExtractor, then we use GALFIT to fit a single Sersic component to derive the effective radius. We also performed a Monte Carlo simulation in order to account for the measurement bias and scatter of SExtractor and GALFIT. The result of the simulation is convolved with the size-luminosity distribution models to compare with the observed distributions. We will compare our best-fit distribution with the luminosity functions published in the literature at similar redshifts.

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