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arXiv · astro-ph/0307015

The Luminosity-Size and Mass-Size Relations of Galaxies out to z~3

Ignacio Trujillo·Gregory Rudnick·Hans-Walter Rix·Ivo Labbe·Marijn Franx·Emanuele Daddi·Pieter G. Van Dokkum·Natascha M. Forster Schreiber·Konrad Kuijken·Alan Moorwood·Huub Rottgering·Arjen Van De Wel·Paul Van Der Werf·Lottie Van Starkenburg
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Abstract

The luminosity-size and stellar mass-size distributions of galaxies out to z~3 is presented. We use very deep near-infrared images of the Hubble Deep Field South in the J_s, H, and K_s bands, taken as part FIRES at the VLT, to follow the evolution of the optical rest-frame sizes of galaxies. For a total of 168 galaxies with K_{s,AB}<23.5, we find that the rest-frame V-band sizes r_{e,V} of luminous galaxies ( ~2x10^{10}h^{-2}L_sun) at 2 ~2x10^{10}h^{-2}M_sun, has changed by 20(+-20)% since z~2.5. Both results can be reconciled by the fact that the stellar M/L ratio is lower in the luminous high z galaxies than in nearby ones because they have young stellar populations. The lower incidence of large galaxies at z~3 seems to reflect the rarity of galaxies with high stellar mass.

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Ignacio Trujillo, Gregory Rudnick, Hans-Walter Rix, Ivo Labbe, Marijn Franx, Emanuele Daddi, Pieter G. Van Dokkum, Natascha M. Forster Schreiber, Konrad Kuijken, Alan Moorwood, Huub Rottgering, Arjen Van De Wel, Paul Van Der Werf, Lottie Van Starkenburg. 2003-12-16. The Luminosity-Size and Mass-Size Relations of Galaxies out to z~3. https://doi.org/10.1086/382060

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