SIMBAD references

2014ApJ...791...18B - Astrophys. J., 791, 18 (2014/August-2)

The rest-frame ultraviolet structure of 0.5 < z < 1.5 galaxies.

BOND N.A., GARDNER J.P., DE MELLO D.F., TEPLITZ H.I., RAFELSKI M., KOEKEMOER A.M., COE D., GROGIN N., GAWISER E., RAVINDRANATH S. and SCARLATA C.

Abstract (from CDS):

We present the rest-frame UV wavelength dependence of the Petrosian-like half-light radius (r50), and the concentration parameter for a sample of 198 star-forming galaxies at 0.5 < z < 1.5. We find a ∼5% decrease in r50 from 1500 Å to 3000 Å, with half-light radii at 3000 Å ranging from 0.6 kpc to 6 kpc. We also find a decrease in concentration of ∼0.07 (1.9 < C3000< 3.9). The lack of a strong relationship between r50and wavelength is consistent with a model in which clumpy star formation is distributed over length scales comparable to the galaxy's rest-frame optical light. While the wavelength dependence of r50is independent of size at all redshifts, concentration decreases more sharply in the far-UV (∼1500 Å) for large galaxies at z ∼ 1. This decrease in concentration is caused by a flattening of the inner ∼20% of the light profile in disk-like galaxies, indicating that the central regions have different UV colors than the rest of the galaxy. We interpret this as a bulge component with older stellar populations and/or more dust. The size-dependent decrease in concentration is less dramatic at z ∼ 2, suggesting that bulges are less dusty, younger, and/or less massive than the rest of the galaxy at higher redshifts.

Abstract Copyright:

Journal keyword(s): cosmology: observations - galaxies: formation - galaxies: high-redshift - galaxies: structure

VizieR on-line data: <Available at CDS (J/ApJ/791/18): table1.dat>

Simbad objects: 199

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2022.08.11-01:15:39

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