Galaxy And Mass Assembly (GAMA): The Bright Void Galaxy Population in the Optical and Mid-IR

Abstract

We examine the properties of galaxies in the Galaxies and Mass Assembly (GAMA) survey located in voids with radii $>10h^{-1}$ Mpc. Utilising the GAMA equatorial survey, 592 void galaxies are identified out to z~0.1 brighter than $M_r=-18.4$, our magnitude completeness limit. Using the $W_{\mathrm{H}\alpha }$ vs. [NII]/H$\alpha$ (WHAN) line strength diagnostic diagram, we classify their spectra as star forming, AGN, or dominated by old stellar populations. For objects more massive than $5\times 10^9$ M${}_{\odot }$, we identify a sample of 26 void galaxies with old stellar populations classed as passive and retired galaxies in the WHAN diagnostic diagram, else they lack any emission lines in their spectra. When matched to WISE mid-IR photometry, these passive and retired galaxies exhibit a range of mid-IR colour, with a number of void galaxies exhibiting [4.6]-[12] colours inconsistent with completely quenched stellar populations, with a similar spread in colour seen for a randomly drawn non-void comparison sample. We hypothesise that a number of these galaxies host obscured star formation, else they are star forming outside of their central regions targeted for single fibre spectroscopy. When matched to a randomly drawn sample of non-void galaxies, the void and non-void galaxies exhibit similar properties in terms of optical and mid-IR colour, morphology, and star formation activity, suggesting comparable mass assembly and quenching histories. A trend in mid-IR [4.6]-[12] colour is seen, such that both void and non-void galaxies with quenched/passive colours <1.5 typically have masses higher than $10^{10}$ M${}_{\odot }$, where internally driven processes play an increasingly important role in galaxy evolution.

22 pages, 12 figures. Accepted for publication in MNRAS

References in corpus (17)

• The Host Galaxies and Classification of Active Galactic Nuclei
• Overview of the SDSS-IV MaNGA Survey: Mapping Nearby Galaxies at Apache Point Observatory
• Galaxy Zoo: the dependence of morphology and colour on environment
• Galaxy And Mass Assembly (GAMA): end of survey report and data release 2
• Dependence of Galaxy Quenching on Halo Mass and Distance from its Centre
• Bursting and Quenching in Massive Galaxies without Major Mergers or AGNs
• The Different Physical Mechanisms that Drive the Star-Formation Histories of Giant and Dwarf Galaxies
• Galaxy And Mass Assembly (GAMA): autoz spectral redshift measurements, confidence and errors
• Galaxy And Mass Assembly: Deconstructing Bimodality - I. Red ones and blue ones
• The emptiness of voids: yet another over-abundance problem for the LCDM model
• Galaxy Colour, Morphology, and Environment in the Sloan Digital Sky Survey
• Galaxy Evolution in Hickson Compact Groups: The Role of Ram Pressure Stripping and Strangulation
• The HI content of Early-Type Galaxies from the ALFALFA survey I. Catalogued HI sources in the Virgo cluster
• The mid-infrared colour-magnitude relation of early-type galaxies in the Coma cluster as measured by Spitzer-IRS
• Where do "red and dead" early-type void galaxies come from?
• Recalibrating the Wide-field Infrared Survey Explorer (WISE) W4 Filter
• The NGC 672 and NGC 784 Galaxy Groups: Evidence for Galaxy Formation and Growth Along a Nearby Dark Matter Filament

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• SDSS-IV MaNGA: Faint quenched galaxies I- Sample selection and evidence for environmental quenching
• The many faces of LINER-like galaxies: a WISE view
• A Detection of $z$~2.3 Cosmic Voids from 3D Lyman-$\alpha$ Forest Tomography in the COSMOS Field
• Updated void catalogs of the SDSS DR7 main sample
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• The density of dark matter haloes of early-type galaxies in low-density environments
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