Spatially resolved spectroscopy of lensed galaxies in the Frontier Fields
Abstract
The Grism Lens-Amplified Survey from Space (GLASS) has obtained slitless near-infrared spectroscopy of 10 galaxy clusters selected for their strong lensing properties, including all six Hubble Frontier Fields. Slitless grism spectra are ideal for mapping emission lines such as [O ii], [O iii], and Hα at z=1-3. The combination of strong gravitational lensing and Hubble's diffraction limit provides excellent sensitivity with spatial resolution as fine as 100 pc for highly magnified sources, and ~500 pc for less magnified sources near the edge of the field of view. The GLASS survey represents the largest spectroscopic sample with such high resolution at z > 1. GLASS and Hubble Frontier Field data provide the distribution of stellar mass, star formation, gas-phase metallicity, and other aspects of the physical structure of high redshift galaxies, reaching stellar masses as low as ~107 M⊙ at z=2. I discuss precise measurements of these physical properties and implications for galaxy evolution.
- Publication:
-
IAU Focus Meeting
- Pub Date:
- 2016
- DOI:
- 10.1017/S1743921316006773
- Bibcode:
- 2016IAUFM..29B.772J
- Keywords:
-
- gravitational lensing;
- galaxies: abundances;
- galaxies: evolution;
- galaxies: high-redshift