Kazan Federal University Digital Repository

Flaring radio lanterns along the ridge line: Long-term oscillatory motion in the jet of S5 1803 + 784

Show simple item record

dc.contributor.author Kun E.
dc.contributor.author Karouzos M.
dc.contributor.author Gabányi K.
dc.contributor.author Britzen S.
dc.contributor.author Kurtanidze O.
dc.contributor.author Gergely L.
dc.date.accessioned 2019-01-22T20:34:12Z
dc.date.available 2019-01-22T20:34:12Z
dc.date.issued 2018
dc.identifier.issn 0035-8711
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/147750
dc.description.abstract © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. We present a detailed analysis of 30 very long baseline interferometric (VLBI) observations of the BL Lac object S5 1803+784 (z= 0.679), obtained between mean observational time 1994.67 and 2012.91 at observational frequency 15 GHz. The long-term behaviour of the jet ridge line reveals the jet experiences an oscillatory motion superposed on its helical jet kinematics on a time-scale of about 6 yr. The excess variance of the positional variability indicates the jet components being farther from the VLBI core have larger amplitude in their position variations. The fractional variability amplitude shows slight changes in 3 yrbins of the component's position. The temporal variability in the Doppler boosting of the ridge line results in jet regions behaving as flaring 'radio lanterns'. We offer a qualitative scenario leading to the oscillation of the jet ridge line that utilizes the orbital motion of the jet emitter black hole due to a binary black hole companion. A correlation analysis implies composite origin of the flux variability of the jet components, emerging due to possibly both the evolving jet structure and its intrinsic variability.
dc.relation.ispartofseries Monthly Notices of the Royal Astronomical Society
dc.subject BL Lacertae objects: Individual: S5 1803+784
dc.subject Galaxies: Active
dc.subject Radio continuum: Galaxies
dc.subject Techniques: Interferometric
dc.title Flaring radio lanterns along the ridge line: Long-term oscillatory motion in the jet of S5 1803 + 784
dc.type Article
dc.relation.ispartofseries-issue 1
dc.relation.ispartofseries-volume 478
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 359
dc.source.id SCOPUS00358711-2018-478-1-SID85048493729


Files in this item

This item appears in the following Collection(s)

  • Публикации сотрудников КФУ Scopus [20180]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

Show simple item record

Search DSpace


Advanced Search

Browse

My Account