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Radio Galaxy Zoo: host galaxies and radio morphologies derived from visual inspection

Citation

Banfield, JK and Wong, OI and Willett, KW and Norris, RP and Rudnick, L and Shabala, SS and Simmons, BD and Snyder, C and Garon, A and Seymour, N and Middelberg, E and Andernach, H and Lintott, CJ and Jacob, K and Kapinska, AD and Mao, MY and Masters, KL and Jarvis, MJ and Schawinski, K and Paget, E and Simpson, R and Klockner, H-R and Bamford, S and Burchell, T and Chow, KE and Cotter, G and Fortson, L and Heywood, I and Jones, TW and Kaviraj, S and Lopez-Sanchez, AR and Maksym, WP and Polsterer, K and Borden, K and Hollow, RP and Whyte, L, Radio Galaxy Zoo: host galaxies and radio morphologies derived from visual inspection, Monthly Notices of the Royal Astronomical Society, 453, (3) pp. 2326-2340. ISSN 0035-8711 (2015) [Refereed Article]


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Copyright Statement

Copyright 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

DOI: doi:10.1093/mnras/stv1688

Abstract

We present results from the rst twelve months of operation of Radio Galaxy Zoo, which upon completion will enable visual inspection of over 170,000 radio sources to determine the host galaxy of the radio emission and the radio morphology. Radio Galaxy Zoo uses 1:4 GHz radio images from both the Faint Images of the Radio Sky at Twenty Centimeters (FIRST) and the Australia Telescope Large Area Survey (AT- LAS) in combination with mid-infrared images at 3:4 μm from the Wide-fi eld Infrared Survey Explorer (WISE) and at 3:6 μm from the Spitzer Space Telescope. We present the early analysis of the WISE mid-infrared colours of the host galaxies. For images in which there is > 75% consensus among the Radio Galaxy Zoo cross-identi cations, the project participants are as e ective as the science experts at identifying the host galaxies. The majority of the identi ed host galaxies reside in the mid-infrared colour space dominated by elliptical galaxies, quasi-stellar objects (QSOs), and luminous in- frared radio galaxies (LIRGs). We also nd a distinct population of Radio Galaxy Zoo host galaxies residing in a redder mid-infrared colour space consisting of star-forming galaxies and/or dust-enhanced non star-forming galaxies consistent with a scenario of merger-driven active galactic nuclei (AGN) formation. The completion of the full Radio Galaxy Zoo project will measure the relative populations of these hosts as a function of radio morphology and power while providing an avenue for the identi ca- tion of rare and extreme radio structures. Currently, we are investigating candidates for radio galaxies with extreme morphologies, such as giant radio galaxies, late-type host galaxies with extended radio emission, and hybrid morphology radio sources.

Item Details

Item Type:Refereed Article
Keywords:methods: data analysis, radio continuum: galaxies, infrared: galaxies
Research Division:Physical Sciences
Research Group:Astronomical and Space Sciences
Research Field:Cosmology and Extragalactic Astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Physical Sciences
Author:Shabala, SS (Dr Stas Shabala)
ID Code:102560
Year Published:2015
Funding Support:Australian Research Council (DE130101399)
Web of Science® Times Cited:14
Deposited By:Mathematics and Physics
Deposited On:2015-08-28
Last Modified:2017-11-03
Downloads:154 View Download Statistics

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