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Investigating the evolution of PKS B1144-379: comparison of VLBI and scintillation techniques
Citation
Md Said, N 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: | Md Said, N (Ms Noor Masdiana Md 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 |
| Web of Science® Times Cited: | 1 |
| Deposited By: | Office of the School of Natural Sciences |
| Deposited On: | 2021-10-22 |
| Last Modified: | 2021-11-23 |
| Downloads: | 11 View Download Statistics |
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