Detection of a second jet within the nuclear core of Mrk 501
S. Britzen·N R MacDonald·F. Jaron·I N Pashchenko·E Kun·D Paneque·J Becerra González·Gopal-Krishna·F K Schinzel·H Olivares
Abstract The blazar Mrk 501 still poses challenging questions for astrophysics, primarily because of the different orientations observed at pc- and kpc-scales. A much debated issue is whether its core harbors a supermassive binary black hole (SMBBH). We re-model and re-analyze 83 datasets observed with the Very Long Baseline Array (VLBA) (2011/09/24 – 2023/07/24) at 43 GHz and compare them with earlier results for 15 GHz and 8 GHz. In addition to the previously known parsec-scale jet in the core