Investigating the evolution of PKS B1144−379: comparison of VLBI and scintillation techniques
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°.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 22, 2021
- Source ID
- 10.1093/mnras/stab2724
Entities
People
- C. Reynolds
- G Orosz
- H. E. Bignall
- J N Mccallum
- Jun Liu
- N M M Said
- Simon Ellingsen
- Stanislav Shabala
Organizations
- United States Naval Observatory
- University of Tasmania