I am a team member of the HST program RELICS (Reionization Lensing Cluster Survey, PI: Dan Coe). RELICS aims to build off of the success of the Frontier Fields and CLASH programs in using the gravitational lensing produced by massive galaxy clusters to peer into the very deep universe. Systematic coverage of more strong lensing systems could produce a host of very high-redshift sources-- a useful sample of targets for follow-up with JWST. RELICS is still taking data on its 41 clusters, which were selected either by their very high dark matter mass as inferred by the Planck Survey, or because they were already known to be excellent lensing clusters. I'll add more of my own results on this project as they come in, but feel welcome to browse the RELICS homepage for more details on other high-z or cluster science.
I am a junior scientist member of the Cosmic Assembley Near-infrared Deep Extragalactic Legacy Survey (CANDELS) which utilizes deep multi-wavelength photometry from the Hubble Space Telescope.
For my PhD work, I used CANDELS to study the evolution of the stellar masses and star formation rates (SFR) of galaxies at z=6.5 to z=3.5. The biggest challenge was to derive accurate stellar masses and SFRs with the given data, which meant developing sophisticated techniques to model the galaxy spectral energy distribution (SED). Thankfully, the multi-band imaging of CANDLES provides rest-frame ultra-violet to near-infrared wavelength coverage even out to these high redshifts. I found that the relation between the SFRs and stellar masses of galaxies at a given epoch extends out to z=6.5, with modest scatter. In addition, I also found that the specific SFRs (SFR/mass) increase with redshift (although with much more scatter) from z=3.5 to 6.5.
Last Modified: Nov 2016
Photo taken by me in the tea planations of Munnar, India