English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We study how the void environment affects galactic chemical evolution bycomparing the oxygen and nitrogen abundances of dwarf galaxies in voids withdwarf galaxies in denser regions. Using spectroscopic observations from SDSSDR7, we estimate oxygen, nitrogen, and neon abundances of 889 void dwarfgalaxies and 672 dwarf galaxies in denser regions. A substitute for the [OII]3727 doublet is developed, permitting oxygen abundance estimates of SDSS dwarfgalaxies at all redshifts with the Direct Te method. We find that void dwarfgalaxies have about the same oxygen abundance and Ne/O ratio, slightly higherneon abundances, and slightly lower nitrogen abundance and N/O ratio than dwarfgalaxies in denser environments. We conclude that the void environment has aslight influence on dwarf galaxy chemical evolution. Our mass-N/O relationshipshows that the secondary production of nitrogen commences at a lower stellarmass in void dwarf galaxies than in dwarf galaxies in denser environments. Ourdwarf galaxy sample demonstrates a strong anti-correlation between the sSFR andN/O ratio, providing evidence that oxygen is produced in higher mass stars thanthose which synthesize nitrogen. The lower N/O ratios and smaller stellar massfor secondary nitrogen production seen in void dwarf galaxies may indicate bothdelayed star formation and a dependence of cosmic downsizing on the large-scaleenvironment. A shift toward slightly higher oxygen abundances in void dwarfgalaxies could be evidence of larger ratios of dark matter halo mass to stellarmass in voids than in denser regions.

Influence of the Void Environment on Chemical Abundances in Dwarf Galaxies and Implications for Connecting Star Formation and Halo Mass