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
journal contributionposted 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 titleMonthly Notices of the Royal Astronomical Society
Department/SchoolSchool of Natural Sciences
PublisherBlackwell Publishing Ltd
Place of publication9600 Garsington Rd, Oxford, England, Oxon, Ox4 2Dg
Rights statementCopyright 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.