A precessing and nutating jet in OJ287

Pashchenko I.N.; Eckart A.; Martinez G.; Nilsson K.; Cuadra J.; Fendt C.; Subroweit M.; Arévalo P.; Qian S.J.; Aller H.; Aller M.; Karas V.; Zajacek M.; Britzen S.; Witzel A.; Kurtanidze O.; Witzel G.

A precessing and nutating jet in OJ287

Britzen S.; Fendt C.; Witzel G.; Qian S.J.; Pashchenko I.N.; Kurtanidze O.; Zajacek M.; Martinez G.; Karas V.; Aller M.; Aller H.; Eckart A.; Nilsson K.; Arévalo P.; Cuadra J.; Subroweit M.; Witzel A.

URI: https://dspace.kpfu.ru/xmlui/handle/net/162382

Date: 2020

Abstract:

© International Astronomical Union 2020. We re-analyzed OJ287 in 120 Very Long Baseline Array (VLBA, MOJAVE) observations (at 15 GHz) covering the time span between Apr. 1995 and Apr. 2017. We find that the radio jet motion over the sky is consistent with a precessing and nutating jet source. The variability of the radio flux-density can be explained by Doppler beaming due to a change in the viewing angle. We suggest that part of the optical emission is due to synchrotron emission related to the jet radiation. We find a strikingly similar scaling for the timescales for precession and nutation as indicated for SS433 with a factor of roughly 50 times longer in OJ287.

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Публикации сотрудников КФУ Scopus [24551]
Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.