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Conference proceeding
Influence of the Void Environment on Chemical Abundances in Dwarf Galaxies and Implications for Connecting Star Formation and Halo Mass
DWARF GALAXIES: FROM THE DEEP UNIVERSE TO THE PRESENT, v 14(S344), pp 369-372
01 Jan 2019
Abstract
We study how the void environment affects the chemical evolution of galaxies by comparing the metallicity of dwarf galaxies in voids with dwarf galaxies in denser regions. Using spectroscopic observations from SDSS DR7, we estimate oxygen and nitrogen abundances of 889 void dwarf galaxies and 672 dwarf galaxies in denser regions. A substitute for the [OII] lambda 3727 doublet is developed, permitting oxygen abundance estimates of SDSS dwarf galaxies at all redshifts with the direct method. We find that void dwarf galaxies have about the same oxygen abundances and slightly lower N/O ratios than dwarf galaxies in denser environments. The lower N/O ratios seen in void dwarf galaxies may indicate both delayed star formation and a dependence of cosmic downsizing on the large-scale environment. Similar oxygen abundances in the two dwarf galaxy populations might be evidence of larger ratios of dark matter halo mass to stellar mass in voids.
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Details
- Title
- Influence of the Void Environment on Chemical Abundances in Dwarf Galaxies and Implications for Connecting Star Formation and Halo Mass
- Creators
- Kelly A. Douglass - Drexel Univ, Dept Phys, 3141 Chestnut St, Philadelphia, PA 19104 USAMichael S. Vogeley - Drexel UniversityRenyue Cen - Princeton Univ, Dept Astrophys, Peyton Hall, Princeton, NJ 05844 USA
- Contributors
- KBW McQuinn (Editor)S Stierwalt (Editor)
- Publication Details
- DWARF GALAXIES: FROM THE DEEP UNIVERSE TO THE PRESENT, v 14(S344), pp 369-372
- Series
- IAU Symposium Proceedings Series
- Publisher
- Cambridge Univ Press
- Number of pages
- 4
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000525487700075
- Scopus ID
- 2-s2.0-105008514663
- Other Identifier
- 991019169575204721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Astronomy & Astrophysics