NOAO >   Observing Info >   Approved Programs >   2017A-0415

Small NOAO Logo

Program Information for 2017A-0415


PI: Liese van Zee, Indiana U., lvanzee@indiana.edu
Address: Astronomy Department, 727 E 3rd St, Bloomington, IN 47405 USA

CoI: Kristy McQuinn, U. of Texas, Austin

Title: Ionized Gas Kinematics and the Chemical Evolution of Nearby Galaxies

Abstract: Fundamentally, the observed gas-phase metallicities in nearby galaxies should correspond to the production and release of the products of stellar nucleosynthesis and, thus, provide a robust trace of galaxy formation and evolution. However, complications associated with mixing times, outflow and infall, and the rotational dependence on expected stellar yields, make these trends more ambiguous. The goal of this proposal is to obtain kinematic data to constrain self-consistent chemical enrichment histories of a modest sample of nearby gas-rich low mass galaxies. Specifically, we will compare the estimate of the kinetic energy input from the derived star formation history and the observed kinetic energy of the ionized and neutral gas at the present epoch. These values, in combination with the calculated dynamical mass (potential well) of each system, will provide insight into the likelihood of significant metal loss through outflow of enriched material and metal dilution through the inflow of pristine gas. The present proposal for 15 galaxies focuses on the galaxies in the sample which are well matched to the SparsePak field-of-view.

Program Type: ITAC

Scheduled Nights:
Run 1 (2017A):  WIYN/SPSPK -- 3n on Apr 20 - Apr 22 2017


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2017A-0415

noaoprop-help@noao.edu

Small NOAO Logo