101 citations · 316 across the 13 of their papers we have counts for
13 papers
SKA-Low simulations for a cosmic dawn/epoch of reionisation deep field
Anna Bonaldi, Philippa Hartley, Simon Purser +7
We present a realistic simulation of an SKA-Low cosmic dawn/epoch of reionisation (CD/EoR) observation, which can be used to further the development of foreground-mitigation approa…
Square Kilometre Array Science Data Challenge 3a: foreground removal for an EoR experiment
A. Bonaldi, P. Hartley, R. Braun +179
We present and analyse the results of the Science data challenge 3a (SDC3a, https://sdc3.skao.int/challenges/foregrounds), an EoR foreground-removal community-wide exercise organis…
A high-resolution radio study of the L1551 IRS 5 and L1551 NE jets
A. Feeney-Johansson, S. J. D. Purser, T. P. Ray +10
Using observations with e-MERLIN and the VLA, together with archival data from ALMA, we obtain high-resolution radio images of two binary YSOs: L1551 IRS 5 and L1551 NE, covering a…
A snapshot of the oldest AGN feedback phases
M. Brienza, T. W. Shimwell, F. de Gasperin +19
Active Galactic Nuclei (AGN) inject large amounts of energy into their host galaxies and surrounding environment, shaping their properties and evolution. In particular, AGN jets in…
Detection of coherent low-frequency radio bursts from weak-line TTauri stars
A. Feeney-Johansson, S. J. D. Purser, T. P. Ray +7
In recent years, thanks to new facilities such as LOFAR capable of sensitive observations, much work has been done on the detection of stellar radio emission at low frequencies. Su…
A Galactic survey of radio jets from massive protostars
S. J. D. Purser, S. L. Lumsden, M. G. Hoare +1
In conjunction with a previous southern-hemisphere work, we present the largest radio survey of jets from massive protostars to date with high-resolution, ($\sim 0.04^{\prime\prime…
A Multi-Epoch Study of Radio Continuum Emission from MassiveProtostars
W. O. Obonyo, S. L. Lumsden, M. G. Hoare +2
We report the results of the Jansky Very Large Array (JVLA) observation of five massive protostars at 6 and 22.2 GHz. The aim of the study was to compare their current fluxes and p…
The first detection of a low-frequency turnover in nonthermal emission from the jet of a young star
Anton Feeney-Johansson, Simon J. D. Purser, Tom P. Ray +4
Radio emission in jets from young stellar objects (YSOs) in the form of nonthermal emission has been seen toward several YSOs. Thought to be synchrotron emission from strong shocks…
Measuring the ionisation fraction in a jet from a massive protostar
R. Fedriani, A. Caratti o Garatti, S. J. D. Purser +7
It is important to determine if massive stars form via disc accretion, like their low-mass counterparts. Theory and observation indicate that protostellar jets are a natural conseq…
A search for non-thermal radio emission from jets of massive young stellar objects
W. O. Obonyo, S. L. Lumsden, M. G. Hoare +3
Massive young stellar objects (MYSOs) have recently been shown to drive jets whose particles can interact with either the magnetic fields of the jet or ambient medium to emit non-t…
Investigating the temporal domain of massive ionized jets - I. A pilot study
S. J. D. Purser, S. L. Lumsden, M. G. Hoare +1
We present sensitive (), radio continuum observations using the Australian telescope compact array (ATCA) at frequencies of and GHz towards 4 MY…
Constraining the nature of DG Tau A's thermal and non-thermal radio emission
S. J. D. Purser, R. E. Ainsworth, T. P. Ray +3
DG Tau A, a class-II young stellar object (YSO) displays both thermal, and non-thermal, radio emission associated with its bipolar jet. To investigate the nature of this emission,…
A search for ionized jets towards massive young stellar objects
S. J. D. Purser, S. L. Lumsden, M. G. Hoare +7
Radio continuum observations using the Australia telescope compact array at 5.5, 9.0, 17.0 and 22.8 GHz have detected free-free emission associated with 45 of 49 massive young stel…