Type: Poster
Session: Posters (Wednesday & Thursday)
Author: Kyle W. Cook

Abstract: The Chandra Deep Field - South has provided an excellent view of our Universe over a range of redshifts and has been selected as a deep-drilling field for the Vera C. Rubin Observatory/LSST. As observations push to higher redshifts, galaxy properties can only be studied by their total area integrated light. Deep and high quality photometric data are needed for robust spectral energy distribution (SED) fitting results. High quality ultraviolet information, in particular, is in high demand due to its scarcity and its importance in tracing star formation rates. The Rubin U-band will be the first of many upcoming surveys that will begin to fill this gap. By combining all Rubin filters with data collected from new surveys observing in other wavelengths, such as HI with the Looking At the Distant Universe with the Meerkat Array (LADUMA) survey, our SED results can be further refined. Here we present an initial study with the LADUMA data using Swift NUV colors to attempt to discover quenching or rejuvenating galaxies. We find 8 galaxies with in the initial LADUMA L-band that have existing SED fits and NUV photometry. Each galaxy shows similar NUV color. Comparison of the HI-to-stellar mass fraction finds that two are highly depleted and three are notably gas-rich. Our working hypothesis is that the two gas poor galaxies are (slowly) quenching, while the three gas-rich galaxies are in a period of rejuvenation. The remaining three sources are the most NUV-blue and consistent with on-going star formation.