APEC Seminar (Astronomy - Particle Physics - Experimental Physics - Cosmology)

Speaker: Sheila Kannappan (University North Carolina)
Title: The REsolved Spectroscopy Of a Local VolumE (RESOLVE) Survey and its Environmental COntext (ECO) Catalog
Date (JST): Thu, Feb 04, 2016, 13:30 - 14:30
Place: Seminar Room A
Abstract: The RESOLVE survey is a volume-limited census of stellar, gas, and dynamical mass as well as star formation and galaxy interactions within >50,000 cubic Mpc of the z~0 cosmic web, reaching down to dwarf galaxies of baryonic mass ~10^9 Msun and up to large-scale groups/clusters, filaments, walls, and voids. RESOLVE is surrounded by the ~10x larger ECO catalog, which uses matched environment metrics and photometric pipelines. RESOLVE/ECO photometry improves dramatically on standard pipeline photometry through careful treatment of sky subtraction, color gradients, and flux extrapolation, with important implications for galaxy star formation histories. ECO offers greater statistical power for analysis of cosmic variance, while RESOLVE offers superior redshift completeness, complete and deep 21cm data probing gas content down to 5-10% of stellar mass, and a growing inventory of 3D optical spectroscopy. I will present early results drawing on recent and upcoming RESOLVE/ECO data releases, for example revealing environment-dependent substructure in the baryonic mass function plausibly tied to group formation, signs of fresh gas accretion and rapid stellar and baryonic mass growth in low-mass halos, and gas deficiency in dwarfs within or near intermediate-mass halos down to 10^12 Msun as well as in large-scale cosmic walls.