Detection of a Peculiar Drift in the Nuclear Radio Jet of the TeV Blazar Markarian 501
Mrk 501 is one of the most prominent TeV-emitting blazars and belongs to the class of high synchrotron peaked (HSP) blazars. The Doppler factors derived from the jet kinematics are much too low to provide sufficient beaming for the detected high-energy emission (the so-called Lorentz factor crisis). This BL Lac object is also a prime example of a
Britzen, Silke et al.
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2023