<record xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><header><identifier>oai:arXiv.org:1507.03011</identifier><datestamp>2015-07-14</datestamp><setSpec>physics:astro-ph</setSpec></header><metadata><oai_dc:dc xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd"><dc:title>The Distribution of Star Formation and Metals in the Low Surface\n  Brightness Galaxy UGC 628</dc:title><dc:creator>Young, J. E.</dc:creator><dc:creator>de Naray, Rachel Kuzio</dc:creator><dc:creator>Wang, Sharon X.</dc:creator><dc:subject>Astrophysics - Astrophysics of Galaxies</dc:subject><dc:description>  We introduce the MUSCEL Program (MUltiwavelength observations of the\nStructure, Chemistry and Evolution of LSB galaxies), a project aimed at\ndetermining the star-formation histories of low surface brightness galaxies.\nMUSCEL utilizes ground-based optical spectra and space-based UV and IR\nphotometry to fully constrain the star-formation histories of our targets with\nthe aim of shedding light on the processes that led low surface brightness\ngalaxies down a different evolutionary path from that followed by high surface\nbrightness galaxies, such as our Milky Way. Here we present the\nspatially-resolved optical spectra of UGC 628, observed with the VIRUS-P IFU at\nthe 2.7-m Harlen J. Smith Telescope at the McDonald Observatory, and utilize\nemission-line diagnostics to determine the rate and distribution of star\nformation as well as the gas-phase metallicity and metallicity gradient. We\nfind highly clustered star formation throughout UGC 628, excluding the core\nregions, and a log(O/H) metallicity around -4.2, with more metal rich regions\nnear the edges of the galactic disk. Based on the emission-line diagnostics\nalone, the current mode of star formation, slow and concentrated in the outer\ndisk, appears to have dominated for quite some time, although there are clear\nsigns of a much older stellar population formed in a more standard inside-out\nfashion.\n</dc:description><dc:description>Comment: 13 pages, 7 figures</dc:description><dc:date>2015-07-10</dc:date><dc:type>text</dc:type><dc:identifier>http://arxiv.org/abs/1507.03011</dc:identifier></oai_dc:dc></metadata></record>
