Metallicities of galaxies in the nearby Lynx-Cancer void

(2) SAO; A. Burenkov (2) ((1) SAAO; A. Kniazev (1); A. Tepliakova (2); Russia); South Africa; S. Pustilnik (2)

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Metallicities of galaxies in the nearby Lynx-Cancer void

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arxiv 1011.3422 v1 pith:QBWFL7Y2 submitted 2010-11-15 astro-ph.CO astro-ph.GA

A. Kniazev (1) , S. Pustilnik (2) , A. Tepliakova (2) , A. Burenkov (2) ((1) SAAO , South Africa , (2) SAO , Russia) This is my paper · ORCID

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keywords galaxiesvoiddwarfslynx-cancernearbyabundancesaddressbest

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Does the void environment have a sizable effect on the evolution of dwarf galaxies? If yes, the best probes should be the most fragile least massive dwarfs. We compiled a sample of about one hundred dwarfs with M_B in the range -12 to -18 mag, falling within the nearby Lynx-Cancer void. The goal is to study their evolutionary parameters -- gas metallicity and gas mass-fraction, and to address the epoch of the first substantial episode of Star Formation. Here we present and discuss the results of O/H measurements in 38 void galaxies, among which several the most metal-poor galaxies are found with the oxygen abundances of 12+log(O/H)=7.12-7.3 dex.

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