Color Gradients in Galaxies Out to z~3: Dependence on Galaxy Properties

Details Color Gradients in Galaxies Out to z~3: Dependence on Galaxy Properties Color Gradients in Galaxies Out to z~3: Dependence on Galaxy Properties

2012-02-02

arxiv.org/abs/1202.0494v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

13 pages, 7 figures, submitted to ApJ

Scientific paper

Using HST/ACS observations, we measure the color gradients of 3248 galaxies in the GOODS-South field out to z~3 and i_{AB}<25.5 and characterize their dependence on galaxy properties (luminosity, apparent magnitude, galaxy size, redshift and morphological type). The color gradient is measured by the difference of v-i color outside (R_{50}1, galaxies show increasingly bluer cores while the color of the outskirts does not change as rapidly. At z~2.5 and -22.0=2 is concentrated in their central regions. These color gradients and their dependence on galaxy properties could also have a significant impact on shear measurements in upcoming weak lensing cosmological surveys.

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