  Tidal disruption events (TDEs) occur when a star or sub-stellar object passes
close enough to a galaxy's supermassive black hole to be disrupted by tidal
forces. NGC 4845 (d=17 Mpc) was host to a TDE, IGR J12580+0134, detected in
November 2010. Its proximity offers us a unique close-up of the TDE and its
aftermath. We discuss new Very Long Baseline Array (VLBA) and Karl G. Jansky
Very Large Array (JVLA) observations, which show that the radio flux from the
active nucleus created by the TDE has decayed in a manner consistent with
predictions from a jet-circumnuclear medium interaction model. This model
explains the source's broadband spectral evolution, which shows a spectral peak
that has moved from the submm (at the end of 2010) to GHz radio frequencies (in
2011-2013) to <1 GHz in 2015. The milliarcsecond-scale core is circularly
polarized at 1.5 GHz but not at 5 GHz, consistent with the model. The VLBA
images show a complex structure at 1.5 GHz that includes an east west extension
~40 milliarcsec (3 pc) long as well as a resolved component 52 milliarcsec (4.1
pc) northwest of the flat-spectrum core, which is all that can be seen at 5
GHz. If ejected in 2010, the NW component must have had v=0.96 c over five
years. However, this is unlikely, as our model suggests strong deceleration to
speeds < 0.5c within months and a much smaller, sub-parsec size. In this
interpretation, the northwest component could have either a non-nuclear origin
or be from an earlier event.
