Please use this identifier to cite or link to this item:
https://www.um.edu.mt/library/oar/handle/123456789/87659
Title: | The UV properties of star forming galaxies I : HST WFC3 observations of very-high redshift galaxies |
Authors: | Wilkins, Stephen M. Bunker, Andrew J. Stanway, Elizabeth R. Lorenzoni, Silvio Caruana, Joseph |
Keywords: | Galaxies Astrophysics Galaxies -- Evolution Galaxies -- Observations Red shift -- Observations Galaxies -- Formation Cosmology |
Issue Date: | 2011 |
Publisher: | arXiv |
Citation: | Wilkins, S. M., Bunker, A. J., Stanway, E., Lorenzoni, S., & Caruana, J. (2011). TThe UV properties of star forming galaxies I : HST WFC3 observations of very-high redshift galaxies. arXiv preprint arXiv:1106.5977. |
Abstract: | The acquisition of deep Near-IR imaging with Wide Field Camera 3 on the Hubble Space Telescope has provided the opportunity to study the very-high redshift Universe. For galaxies up to sufficient wavelength coverage exists to probe the rest-frame ultraviolet (UV) continuum without contamination from either Lyman- emission or the Lyman- break. In this work we use Near-IR imaging to measure the rest-frame UV continuum colours of galaxies at . We are have carefully defined a colour-colour selection to minimise any inherent bias in the measured UV continuum slope for the drop-out samples. For the highest-redshift sample (), selected as -band dropouts, we find mean UV continuum colours approximately equal to zero (AB), consistent with a dust-free, solar metallicity, star forming population (or a moderately dusty population of low metallicity). At lower-redshift we find that the mean UV continuum colours of galaxies (over the same luminosity range) are redder, and that galaxies with higher luminosities are also slightly redder on average. One interpretation of this is that lower-redshift and more luminous galaxies are dustier, however this interpretation is complicated by the effects of the star formation history and metallicity and potentially the initial mass function on the UV continuum colours. |
URI: | https://www.um.edu.mt/library/oar/handle/123456789/87659 |
Appears in Collections: | Scholarly Works - FacSciPhy |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
The UV properties of star forming galaxies.pdf | 674.35 kB | Adobe PDF | View/Open |
Items in OAR@UM are protected by copyright, with all rights reserved, unless otherwise indicated.