University Of Tasmania
147276 - Investigating the evolution of PKS B1144-379.pdf (9.31 MB)

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

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journal contribution
posted on 2023-05-21, 03:23 authored by Noor Masdiana Md Said, Simon EllingsenSimon Ellingsen, Stanislav ShabalaStanislav Shabala, Orosz, G, Liu, J, Bignall, HE, Jamie McCallumJamie McCallum, Reynolds, C
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°.


Publication title

Monthly Notices of the Royal Astronomical Society








School of Natural Sciences


Blackwell Publishing Ltd

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9600 Garsington Rd, Oxford, England, Oxon, Ox4 2Dg

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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.

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