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Investigating the evolution of PKS B1144-379: comparison of VLBI and scintillation techniques

Citation

Said, NMM and Ellingsen, SP and Shabala, S and Orosz, G and Liu, J and Bignall, HE and McCallum, JN and Reynolds, C, Investigating the evolution of PKS B1144-379: comparison of VLBI and scintillation techniques, Monthly Notices of the Royal Astronomical Society, 508, (2) pp. 2881-2896. ISSN 0035-8711 (2021) [Refereed Article]


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Copyright Statement

Copyright 2021 The Authors. This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society 2021 The Authors. Published by Oxford University Press on behalf on the Royal Astronomical Society. All rights reserved.

DOI: doi:10.1093/mnras/stab2724

Abstract

We have investigated the evolution of the BL Lac object PKS B1144-379 using the University of Tasmania Ceduna 30-m radio telescope at a frequency of 6.7 GHz and very long baseline interferometry (VLBI) data at 8.6 GHz. Variability time-scales associated with two flares detected in 2005 November and 2008 August were derived from long-term variations in total flux density monitored by Ceduna between 2003 and 2011. A kinematic study of the parsec-scale jet of PKS B1144-379 was performed using VLBI data obtained between 1997 and 2018. Quasi-periodic flarings with a period of ∼3-4 yr were observed. Over the 20-yr interval, the average jet position angle was found to be ∼150.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Cosmology and extragalactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Said, NMM (Miss Noor Said)
UTAS Author:Ellingsen, SP (Professor Simon Ellingsen)
UTAS Author:Shabala, S (Associate Professor Stas Shabala)
UTAS Author:Orosz, G (Mr Gabor Orosz)
UTAS Author:McCallum, JN (Dr Jamie McCallum)
ID Code:147276
Year Published:2021
Deposited By:Office of the School of Natural Sciences
Deposited On:2021-10-22
Last Modified:2021-11-23
Downloads:0

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