NOAO >   Observing Info >   Approved Programs >   2017B-0807

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Program Information for 2017B-0807


PI: Samantha Brunker, Indiana U., sbrunker@indiana.edu
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 $sim Gyr. Because we don't see any galaxies with the same combination of extreme star-formation and low metal abundance in the very local universe, these [O III]-selected H$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

Scheduled Nights:
Run 1 (2017B):  WIYN/HYDR -- 4n on Nov 11 - Nov 14 2017


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NOAO >   Observing Info >   Approved Programs >   2017B-0807

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