Journal article
High-resolution observations of low-luminosity gigahertz-peaked spectrum and compact steep-spectrum sources
JD Collier, SJ Tingay, JR Callingham, RP Norris, MD Filipovic, TJ Galvin, MT Huynh, HT Intema, J Marvil, AN O'Brien, Q Roper, S Sirothia, NFH Tothill, ME Bell, B-Q For, BM Gaensler, PJ Hancock, L Hindson, N Hurley-Walker, M Johnston-Hollitt Show all
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | OXFORD UNIV PRESS | Published : 2018
DOI: 10.1093/mnras/sty564
Abstract
We present very long baseline interferometry observations of a faint and low-luminosity (L1.4 GHz < 1027 W Hz−1) gigahertz-peaked spectrum (GPS) and compact steep-spectrum (CSS) sample. We select eight sources from deep radio observations that have radio spectra characteristic of a GPS or CSS source and an angular size of θ ≲ 2 arcsec, and detect six of them with the Australian Long Baseline Array. We determine their linear sizes, and model their radio spectra using synchrotron self-absorption (SSA) and free–free absorption (FFA) models. We derive statistical model ages, based on a fitted scaling relation, and spectral ages, based on the radio spectrum, which are generally consistent with th..
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Awarded by Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO)
Funding Acknowledgements
The Australian SKA Pathfinder is part of the Australia Telescope National Facility, which is managed by CSIRO. Operation of ASKAP is funded by the Australian Government with support from the National Collaborative Research Infrastructure Strategy. ASKAP uses the resources of the Pawsey Supercomputing Centre. This scientific work makes use of the Murchison Radio-astronomy Observatory, operated by CSIRO. Support for the operation of the MWA is provided by the Australian Government (NCRIS), under a contract to Curtin University administered by Astronomy Australia Limited. Establishment of ASKAP, the Murchison Radioastronomy Observatory, and the Pawsey Supercomputing Centre are initiatives of the Australian Government, with support from the Government of Western Australia and the Science and Industry Endowment Fund. We acknowledge the Wajarri Yamatji people as the traditional owners of the Observatory site.r The MOST is operated by the University of Sydney with support from the Australian Research Council and the Science Foundation for Physics within the University of Sydney.r Part of this work has been conducted with the financial support from the Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO), through project number CE110001020.