The evolution of the mass-size relation to z=3.5 for UV-bright galaxies and sub-mm galaxies in the GOODS-NORTH field - Astrophysics > Cosmology and Nongalactic AstrophysicsReportar como inadecuado




The evolution of the mass-size relation to z=3.5 for UV-bright galaxies and sub-mm galaxies in the GOODS-NORTH field - Astrophysics > Cosmology and Nongalactic Astrophysics - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: We study the evolution of the size - stellar mass relation for a largespectroscopic sample of galaxies in the GOODs North field up to $z \sim 3.5$.The sizes of the galaxies are measured from $\textit{K} {s}$-band imagescorresponding to rest-frame optical-NIR from the Subaru 8m telescope. Wereproduce earlier results based on photometric redshifts that the sizes ofgalaxies at a given mass evolve with redshift. Specifically, we compare sizesof UV-bright galaxies at a range of redshifts: Lyman break galaxies LBGsselected through the U-drop technique $z \sim 2.5-3.5$, BM-BX galaxies at $z\sim 1.5-2.5$, and GALEX LBGs at low redshift $z \sim 0.6-1.5$. The mediansizes of these UV-bright galaxies evolve as $1+z^{-1.11\pm0.13}$ between $z\sim 0.5-3.5$. The UV-bright galaxies are significantly larger than quiescentgalaxies at the same mass and redshift by $0.45\pm0.09$ dex. We also verify thecorrelation between color and stellar mass density of galaxies to highredshifts. The sizes of sub-mm galaxies in the same field are measured andcompared with BM-BX galaxies. We find that median half-light radii of SMGs is$2.90 \pm 0.45$ kpc and there is little difference in their size distributionto the UV-bright star forming galaxies.



Autor: Moein Mosleh 1, Rik J. Williams 2, Marijn Franx 1, Mariska Kriek 3 1 Leiden Observatory, 2 Carnegie Observatory, 3 Harvard-CfA

Fuente: https://arxiv.org/







Documentos relacionados