Radio jet precession in M 81*

نویسندگان

چکیده

We report four novel position angle measurements of the core region M81* at 5GHz and 8GHz, which confirm presence sinusoidal jet precession M81 as suggested by \cite{Marti-Vidal2011}. The model makes three testable predictions on evolution precession, we test in our data with observations 2017, 2018, 2019. Our confirms a period $\sim7~\mathrm{yr}$ top small linear drift. further show that two 8 GHz observation are consistent $\sim 7~\mathrm{yr}$, but different time-lag w.r.t. to 5 1.7 observations. do not find periodic modulation light curve therefore rule out Doppler nature historic 1998-2002 flare. either binary black hole origin or Lense-Thirring effect.

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ژورنال

عنوان ژورنال: Astronomy and Astrophysics

سال: 2023

ISSN: ['0004-6361', '1432-0746']

DOI: https://doi.org/10.1051/0004-6361/202245506