PI: Samantha Brunker, Indiana U., email@example.com
Address: Astronomy Department, 727 E. Third Street, Swain West 319, Bloomington, IN 47405 USA
CoI: John J Salzer, Indiana U.
Title: Probing the Environment of Extreme [O III]-selected H(alpha) Dots
Abstract: We propose to obtain Hydra spectroscopy for galaxies in the vicinity of an unusual class of extreme star-forming galaxies. Discovered via their strong [O III] emission in the high-sensitivity H$alpha$ Dots narrow-band imaging survey, these galaxies are undergoing a major burst of star-formation and have very low metallicities. In particular, many of these objects appear to have metal abundances more than a factor of ten lower than what is observed in nearby galaxies with the same luminosities. This makes them similar to, but even more extreme than, the so-called Green Pea galaxies. The galaxies in our sample are at redshifts 0.317 $<$ z $<$ 0.344, which corresponds to a look back time of $sim$3 Gyr. Because we don't see any galaxies with the same combination of extreme star-formation and low metal abundance in the very local universe, these [O III]-selected H$alpha$ Dots must undergo extreme chemical evolution in a short amount of time. In this study we are proposing to map out the large-scale structure in the neighborhood around these systems, to understand what role, if any, the local environment plays in driving their current activity.
Program Type: ITAC
Run 1 (2018A): WIYN/HYDR -- 4n on Mar 16 - Mar 19 2018
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360