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Probing Individual Star Forming Regions Within Strongly Lensed Galaxies at z > 1

Published online by Cambridge University Press:  09 February 2015

Matthew B. Bayliss ,
Jane R. Rigby ,
Keren Sharon ,
Michael D. Gladders  and
Eva Wuyts
Matthew B. Bayliss
Affiliation:
Dept. of Physics, Harvard University, 17 Oxford St., Cambridge, MA, 02138 email: mbayliss@cfa.harvard.edu
Jane R. Rigby
Affiliation:
Obs. Cosmology Lab, NASA Goddard Space Flight Center, Greenbelt, MD, 20771
Keren Sharon
Affiliation:
Dept. of Astronomy, the Univ. of Michigan, 1085 S. University Ave., Ann Arbor, MI, 48109
Michael D. Gladders
Affiliation:
Dept. of Astronomy & Astrophysics, Univ. of Chicago, 5640 S. Ellis Ave., Chicago, IL, 60637
Eva Wuyts
Affiliation:
MPE, Postfach 1312, Giessenbachstr., D-85741Garching, Germany
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Abstract

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Star formation occurs on physical scales corresponding to individual star forming regions, typically of order ∼100 parsecs in size, but current observational facilities cannot resolve these scales within field galaxies beyond the local universe. However, the magnification from strong gravitational lensing allows us to measure the properties of these discrete star forming regions within galaxies in the distant universe. New results from multi-wavelength spectroscopic studies of a sample of extremely bright, highly magnified lensed galaxies are revealing the complexity of star formation on sub-galaxy scales during the era of peak star formation in the universe. We find a wide range of properties in the rest-frame UV spectra of individual galaxies, as well as in spectra that originate from different star forming regions within the same galaxy. Large variations in the strengths and velocity structure of Lyman-alpha and strong P Cygni lines such as C IV, and MgII provide new insights into the astrophysical relationships between extremely massive stars, the elemental abundances and physical properties of the nebular gas those stars ionize, and the galactic-scale outflows they power.

Keywords

gravitational lensing: strong — high-redshift galaxies — galaxies: star formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S309: Galaxies in 3D across the Universe , July 2014 , pp. 251 - 254
Copyright
Copyright © International Astronomical Union 2015 

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