Square Kilometre Array

2021 ◽  
pp. 1-3
Author(s):  
Jeff Wagg ◽  
Izaskun Jimenez-Serra ◽  
Tyler Bourke ◽  
Robert Braun ◽  
Phil Diamond ◽  
...  
Keyword(s):  
Square Kilometre Array

scholarly journals A circular polarization survey for radio stars with the Australian SKA Pathfinder

2021 ◽  
Vol 502 (4) ◽  
pp. 5438-5454
Author(s):  
Joshua Pritchard ◽  
Tara Murphy ◽  
Andrew Zic ◽  
Christene Lynch ◽  
George Heald ◽  
...  
Keyword(s):  
Radio Emission ◽  
Brightness Temperature ◽  
Circular Polarization ◽  
Flux Density ◽  
Wide Band ◽  
M Dwarfs ◽  
Square Kilometre Array ◽  
Population Statistics ◽  
Chemically Peculiar ◽  
Radio Stars

ABSTRACT We present results from a circular polarization survey for radio stars in the Rapid ASKAP Continuum Survey (RACS). RACS is a survey of the entire sky south of δ = +41○ being conducted with the Australian Square Kilometre Array Pathfinder telescope (ASKAP) over a 288 MHz wide band centred on 887.5 MHz. The data we analyse include Stokes I and V polarization products to an RMS sensitivity of 250 μJy PSF−1. We searched RACS for sources with fractional circular polarization above 6 per cent, and after excluding imaging artefacts, polarization leakage, and known pulsars we identified radio emission coincident with 33 known stars. These range from M-dwarfs through to magnetic, chemically peculiar A- and B-type stars. Some of these are well-known radio stars such as YZ CMi and CU Vir, but 23 have no previous radio detections. We report the flux density and derived brightness temperature of these detections and discuss the nature of the radio emission. We also discuss the implications of our results for the population statistics of radio stars in the context of future ASKAP and Square Kilometre Array surveys.

scholarly journals Unexpected circular radio objects at high Galactic latitude

2021 ◽  
Vol 38 ◽  
Author(s):  
Ray P. Norris ◽  
Huib T. Intema ◽  
Anna D. Kapińska ◽  
Bärbel S. Koribalski ◽  
Emil Lenc ◽  
...  
Keyword(s):  
Galactic Latitude ◽  
High Galactic Latitude ◽  
Square Kilometre Array ◽  
Pilot Survey ◽  
The Universe

Abstract We have found a class of circular radio objects in the Evolutionary Map of the Universe Pilot Survey, using the Australian Square Kilometre Array Pathfinder telescope. The objects appear in radio images as circular edge-brightened discs, about one arcmin diameter, that are unlike other objects previously reported in the literature. We explore several possible mechanisms that might cause these objects, but none seems to be a compelling explanation.

scholarly journals Discovery of H i gas in a young radio galaxy at z = 0.44 using the Australian Square Kilometre Array Pathfinder

2015 ◽  
Vol 453 (2) ◽  
pp. 1249-1267 ◽  
Author(s):  
J. R. Allison ◽  
E. M. Sadler ◽  
V. A. Moss ◽  
M. T. Whiting ◽  
R. W. Hunstead ◽  
...  
Keyword(s):  
Radio Galaxy ◽  
Square Kilometre Array

scholarly journals Pulsar Science with the SKA

2017 ◽  
Vol 13 (S337) ◽  
pp. 158-164 ◽  
Author(s):  
Evan F. Keane
Keyword(s):  
Milky Way ◽  
Phase 1 ◽  
Square Kilometre Array

AbstractThe Square Kilometre Array (SKA) will be sensitive enough to discover all of the pulsars in the Milky Way that are beamed towards Earth. Already in the initial deployment, SKA Phase 1, it will make significant advances in pulsar science. In these proceedings I briefly overview what the SKA is, and describe its pulsar search and timing capabilities.

scholarly journals Ghana in the Square Kilometre Array

2014 ◽  
Vol 2 (12) ◽  
pp. 1040-1045 ◽  
Author(s):  
Proven-Adzri Emmanuel ◽  
Nana Klutse ◽  
Dickson Adomako ◽  
Prosper Ashilevi ◽  
Eric Aggrey
Keyword(s):  
Square Kilometre Array
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