219 citations · 741 across the 22 of their papers we have counts for
22 papers
The Discovery of 63 Giant Radio Galaxies in the FIRST Survey
Soren Ramdhanie, Yjan A. Gordon, Heinz Andernach +2
Giant Radio Galaxies (GRGs) are Active Galactic Nuclei (AGN) with radio emission that extends over projected sizes Mpc. The large angular sizes associated with GRGs complic…
Hydra II: Characterisation of Aegean, Caesar, ProFound, PyBDSF, and Selavy source finders
M. M. Boyce, A. M. Hopkins, S. Riggi +24
We present a comparison between the performance of a selection of source finders using a new software tool called Hydra. The companion paper, Paper~I, introduced the Hydra tool and…
Hydra I: An extensible multi-source-finder comparison and cataloguing tool
M. M. Boyce, A. M. Hopkins, S. Riggi +24
The latest generation of radio surveys are now producing sky survey images containing many millions of radio sources. In this context it is highly desirable to understand the perfo…
Compact Steep Spectrum Radio Sources with Enhanced Star Formation are Smaller than kpc
Yjan A. Gordon, Christopher P. O'Dea, Stefi A. Baum +3
Compact Steep Spectrum (CSS) radio sources are active galactic nuclei that have radio jets propagating only on galactic scales, defined as having projected linear sizes (LS) of up…
Galaxy interactions are the dominant trigger for local type 2 quasars
J. C. S. Pierce, C. Tadhunter, C. Ramos Almeida +8
The triggering mechanism for the most luminous, quasar-like active galactic nuclei (AGN) remains a source of debate, with some studies favouring triggering via galaxy mergers, but…
A Quick Look at the 3GHz Radio Sky. II. Hunting for DRAGNs in the VLA Sky Survey
Yjan A. Gordon, Lawrence Rudnick, Heinz Andernach +9
Active Galactic Nuclei (AGN) can often be identified in radio images as two lobes, sometimes connected to a core by a radio jet. This multi-component morphology unfortunately creat…
Identification of Galaxy-Galaxy Strong Lens Candidates in the DECam Local Volume Exploration Survey Using Machine Learning
E. A. Zaborowski, A. Drlica-Wagner, F. Ashmead +88
We perform a search for galaxy-galaxy strong lens systems using a convolutional neural network (CNN) applied to imaging data from the first public data release of the DECam Local V…
Connecting MeerKAT radio continuum properties to GAMA optical emission-line and WISE mid-infrared activity
H. F. M. Yao, M. E. Cluver, T. H. Jarrett +10
The identification of AGN in large surveys has been hampered by seemingly discordant classifications arising from differing diagnostic methods, usually tracing distinct processes s…
Do AGN triggering mechanisms vary with radio power? II. The importance of mergers as a function of radio power and optical luminosity
J. C. S. Pierce, C. N. Tadhunter, Y. Gordon +7
Investigation of the triggering mechanisms of radio AGN is important for improving our general understanding of galaxy evolution. In the first paper in this series, detailed morpho…
The Evolutionary Map of the Universe Pilot Survey
Ray P. Norris, Joshua Marvil, J. D. Collier +45
We present the data and initial results from the first Pilot Survey of the Evolutionary Map of the Universe (EMU), observed at 944 MHz with the Australian Square Kilometre Array Pa…
Ionized Gas Outflows in Low Excitation Radio Galaxies Are Radiation Driven
Mainak Singha, Christopher P. O'Dea, Yjan A. Gordon +2
Low excitation radio galaxies (LERGs) are weakly accreting active galactic nuclei (AGN) believed to be fuelled by radiatively inefficient accretion processes. Despite this, recent…
A Quick Look at the GHz Radio Sky I. Source Statistics from the Very Large Array Sky Survey
Yjan A. Gordon, Michelle M. Boyce, Christopher P. O'Dea +8
The Very Large Array Sky Survey (VLASS) is observing the entire sky north of in the S-band (GHz), with the highest angular resolution () of any all-sk…
The Impact of Disturbed Galaxy Clusters on the Kinematics of Active Galactic Nuclei
Lawrence E. Bilton, Kevin A. Pimbblet, Yjan A. Gordon
We produce a kinematic analysis of AGN-hosting cluster galaxies from a sample 33 galaxy clusters selected using the X-ray Clusters Database (BAX) and populated with galaxies from t…
Galaxy and Mass Assembly (GAMA): A study of the activity of emission-line systems in G23
H. F. M. Yao, T. H. Jarrett, M. E. Cluver +12
We present a detailed study of emission-line systems in the GAMA G23 region, making use of photometry that includes carefully measured resolved sources. After apply…
Mergers Do Trigger AGNs out to z 0.6
F. Gao, L. Wang, W. J. Pearson +6
Aims. The fueling and feedback of Active Galactic Nuclei (AGNs) are important in understanding the co-evolution between black holes and host galaxies. Mergers are thought to have t…
High Redshift Obscured Quasars and the Need for Optical to NIR, Massively Multiplexed, Spectroscopic Facilities
Andreea Petric, Mark Lacy, Stéphanie Juneau +15
Most bulge-dominated galaxies host black holes with masses that tightly correlate with the masses of their bulges. This may indicate that the black holes may regulate galaxy growth…
The Effect of Minor and Major Mergers on the Evolution of Low Excitation Radio Galaxies
Yjan A. Gordon, Kevin A. Pimbblet, Sugata Kaviraj +8
We use deep, , -band imaging from the Dark Energy Camera Legacy Survey (DECaLS) to search for past, or ongoing, merger activit…
The Detailed Science Case for the Maunakea Spectroscopic Explorer, 2019 edition
The MSE Science Team, Carine Babusiaux, Maria Bergemann +258
(Abridged) The Maunakea Spectroscopic Explorer (MSE) is an end-to-end science platform for the design, execution and scientific exploitation of spectroscopic surveys. It will unvei…
The Impact of Spectroscopic Fibre Collisions on the Observed Angular Correlation Function
Yjan A. Gordon, Kevin A. Pimbblet, Matt S. Owers
The design of some spectroscopic galaxy surveys is such that fibre collisions can affect the completeness of the survey. To quantify this effect, we compare the two-point correlati…
Galaxy And Mass Assembly (GAMA): The effect of galaxy group environment on active galactic nuclei
Yjan A. Gordon, Kevin A. Pimbblet, Matt S. Owers +9
In galaxy clusters, efficiently accreting active galactic nuclei (AGN) are preferentially located in the infall regions of the cluster projected phase-space, and are rarely found i…
The Taipan Galaxy Survey: Scientific Goals and Observing Strategy
Elisabete da Cunha, Andrew M. Hopkins, Matthew Colless +37
Taipan is a multi-object spectroscopic galaxy survey starting in 2017 that will cover 2pi steradians over the southern sky, and obtain optical spectra for about two million galaxie…
Galaxy And Mass Assembly (GAMA): Active Galactic Nuclei in Pairs of Galaxies
Yjan A. Gordon, Matt S. Owers, Kevin A. Pimbblet +14
There exist conflicting observations on whether or not the environment of broad and narrow line AGN differ and this consequently questions the validity of the AGN unification model…