University Of Tasmania
130385 - Radio Galaxy Zoo- observational evidence for environment.pdf (2.61 MB)
Download file

Radio Galaxy Zoo: observational evidence for environment as the cause of radio source asymmetry

Download (2.61 MB)
journal contribution
posted on 2023-05-20, 00:07 authored by Rodman, PE, Ross TurnerRoss Turner, Stanislav ShabalaStanislav Shabala, Banfield, JK, Wong, OI, Andernach, H, Garon, AF, Kapinska, AD, Norris, RP, Rudnick, L
We investigate the role of environment on radio galaxy properties by constructing a sample of large (≳100 kpc), nearby (𝓏 < 0.3) radio sources identified as part of the Radio Galaxy Zoo citizen science project. Our sample consists of 16 Fanaroff-Riley Type II (FR-II) sources, 6 FR-I sources, and 1 source with a hybrid morphology. FR-I sources appear to be hosted by more massive galaxies, consistent with previous studies. In the FR-II sample, we compare the degree of asymmetry in radio lobe properties to asymmetry in the radio source environment, quantified through optical galaxy clustering. We find that the length of radio lobes in FR-II sources is anticorrelated with both galaxy clustering and lobe luminosity. These results are in quantitative agreement with predictions from radio source dynamical models and suggest that galaxy clustering provides a useful proxy for the ambient gas density distribution encountered by the radio lobes.


Australian Research Council


Publication title

Monthly Notices of the Royal Astronomical Society










School of Natural Sciences


Blackwell Publishing Ltd

Place of publication

9600 Garsington Rd, Oxford, England, Oxon, Ox4 2Dg

Rights statement

Copyright 2018 The Authors. This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©:2018. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

Repository Status

  • Open

Socio-economic Objectives

Expanding knowledge in the physical sciences