Galaxies Unveiled: Rest-frame UV Clumps at 0.5 ≤ z ≤ 1.5
Abstract
We present an investigation of clumpy galaxies in the Hubble Ultra Deep Field at 0.5 ≤ z ≤ 1.5 in their rest-frame FUV using 3 ultra-deep UV mosaics in the F225W, F275W, and F336W filters taken with Wide Field Camera 3 UVIS detector. An analysis of all clumpy galaxies in our redshift range yields 209 galaxies that host 403 clumps detected at rest-frame 1500Å. These host galaxies appear to be typical star-forming main sequence galaxies, with a diversity of clump number, ranging from a single clump to galaxies with several clumps. We measure the photometry of the clumps and determine the mass, age, and star formation rates of a subsample of 100 clumps utilizing FAST (Fitting and Assessment of Synthetic Templates). We find that clumps contribute an average of 19% of the total rest-frame FUV flux of the host galaxy, comprise only a small fraction of the total star formation rate of their host galaxy, and individually contribute a median of ~1% of the host galaxy mass, with an average total clump mass contribution of 4%. We discuss clump properties in the context of the overall properties of their host galaxies to determine the role they play in galaxy evolution.
- Publication:
-
American Astronomical Society Meeting Abstracts #227
- Pub Date:
- January 2016
- Bibcode:
- 2016AAS...22734235S