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

N. M.M. Said; S. P. Ellingsen; S. Shabala; G. Orosz; J. Liu; H. E. Bignall; J. N. Mccallum; C. Reynolds

doi:10.1093/mnras/stab2724

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

N. M.M. Said, S. P. Ellingsen, S. Shabala, G. Orosz, J. Liu, H. E. Bignall, J. N. Mccallum, C. Reynolds

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2 Citations (Scopus)

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°.

Original language	English
Pages (from-to)	2881-2896
Number of pages	16
Journal	Monthly Notices of the Royal Astronomical Society
Volume	508
Issue number	2
DOIs	https://doi.org/10.1093/mnras/stab2724
Publication status	Published - 1 Dec 2021
Externally published	Yes

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10.1093/mnras/stab2724

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title = "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°.",

keywords = "galaxies: jets, quasars: individual: PKS B1144-379",

author = "Said, {N. M.M.} and Ellingsen, {S. P.} and S. Shabala and G. Orosz and J. Liu and Bignall, {H. E.} and Mccallum, {J. N.} and C. Reynolds",

note = "Publisher Copyright: {\textcopyright} 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.",

year = "2021",

month = dec,

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doi = "10.1093/mnras/stab2724",

language = "English",

volume = "508",

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T1 - Investigating the evolution of PKS B1144-379

T2 - Comparison of VLBI and scintillation techniques

AU - Said, N. M.M.

AU - Ellingsen, S. P.

AU - Shabala, S.

AU - Orosz, G.

AU - Liu, J.

AU - Bignall, H. E.

AU - Mccallum, J. N.

AU - Reynolds, C.

PY - 2021/12/1

Y1 - 2021/12/1

N2 - 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°.

AB - 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°.

KW - galaxies: jets

KW - quasars: individual: PKS B1144-379

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JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 2

ER -

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

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