NOAO >   Observing Info >   Approved Programs >   2014A-0046

Small NOAO Logo

Proposal Information for 2014A-0046


PI: James Schombert, Dept. of Physics, jschombe@uoregon.edu
Address: Univ. of Oregon, 461 Willamette Hall, Eugene, OR 97403, USA

Title: Star Formation in Dwarf Spirals

Abstract: We propose to obtain H(alpha) and optical broad band images of a select sample of dwarf spirals, a new type of dwarf galaxy. Our claim that a new class of dwarf galaxies exists is based on a combination of their morphological, luminosity, HI and kinematic properties (i.e., double-horned HI profiles that confirm rotation). Outstanding issues on the formation and evolution of dwarf spirals are the origin of their spiral patterns in dark matter dominated disks, style of star formation in the LSB realm and clues to their existence with respect to the local environment. The goal of this project is to use deep H(alpha) imaging to 1) map the HII regions as they measure spiral patterns and design, 2) measure the current and the time-averaged star formation rate in these unusual galaxies, 3) determine the structural parameters (disk scalelength, central surface brightness, B/D ratios) for comparison between star-forming dS's and non-star forming dS0's, and 4) provide a baseline set of observations for follow-up VLA and mid-IR space imaging.


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 >   2014A-0046

noaoprop-help@noao.edu

Small NOAO Logo