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Journal article
ON THE STAR FORMATION PROPERTIES OF VOID GALAXIES
The Astrophysical journal, v 831(2), p118
10 Nov 2016
Abstract
We measure the star formation properties of two large samples of galaxies from the SDSS in large-scale cosmic voids on timescales of 10 and 100 Myr, using Ha emission line strengths and GALEX FUV fluxes, respectively. The first sample consists of 109,818 optically selected galaxies. We find that void galaxies in this sample have higher specific star formation rates (SSFRs; star formation rates per unit stellar mass) than similar stellar mass galaxies in denser regions. The second sample is a subset of the optically selected sample containing 8070 galaxies with reliable H I detections from ALFALFA. For the full H I detected sample, SSFRs do not vary systematically with large-scale environment. However, investigating only the H I detected dwarf galaxies reveals a trend toward. higher SSFRs in voids. Furthermore, we estimate the star formation rate per unit H I mass (known as the star formation efficiency; SFE) of a galaxy, as a function of environment. For the overall H I detected population, we notice no environmental dependence. Limiting the sample to dwarf galaxies still does not reveal a statistically significant difference between SFEs in voids versus walls. These results suggest that void environments, on average, provide a nurturing environment for dwarf galaxy evolution allowing for higher specific star formation rates while forming stars with similar efficiencies to those in walls.
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Details
- Title
- ON THE STAR FORMATION PROPERTIES OF VOID GALAXIES
- Creators
- Crystal M. Moorman - Drexel UniversityJackeline Moreno - Drexel UniversityAmanda White - Drexel UniversityMichael S. Vogeley - Drexel UniversityFiona Hoyle - Pontificia Universidad Católica del EcuadorRiccardo Giovanelli - Cornell UniversityMartha P. Haynes - Cornell University
- Publication Details
- The Astrophysical journal, v 831(2), p118
- Publisher
- Iop Publishing Ltd
- Number of pages
- 13
- Grant note
- Max Planck Society; Foundation CELLEX Max Planck Institute for Astronomy (MPIA) New Mexico State University University of Chicago Japan Participation Group; Sloan Digital Sky Survey (SDSS) U.S. Department of Energy; United States Department of Energy (DOE) National Aeronautics and Space Administration; National Aeronautics & Space Administration (NASA) Korean Scientist Group Institute for Advanced Study 1410525 / Division Of Astronomical Sciences; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS) Brinson Foundation United States Naval Observatory Japanese Monbukagakusho; Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Fermilab AST-0607007; AST-1107390; AST-1410525 / NSF; National Science Foundation (NSF) University of Pittsburgh Los Alamos National Laboratory; United States Department of Energy (DOE) National Science Foundation; National Science Foundation (NSF) Alfred P. Sloan Foundation University of Washington Johns Hopkins University Max Planck Institute for Astrophysics (MPA) Princeton University
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000387792500004
- Scopus ID
- 2-s2.0-84994495741
- Other Identifier
- 991019169412204721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics