The innermost region of the NGC 1023 Group: Insight into its evolution
  The NGC 1023 group is one of the most studied nearby groups. We want to give
an insight into the evolution of its innermost region by means of ultraviolet
observations and proper models. We used the FUV and NUV GALEX archival data as
well as a large set of SPH simulations with chemo-photometric implementation.
From the UV observations we found that several, already known, dwarf galaxies
very close to NGC 1023 are also detected in UV and two more objects (with no
optical counterpart) can be added to the group. Using these data we construct
exhaustive models to account for their formation. We find that the whole SED of
NGC 1023 and its global properties are well matched by a simulation which
provides a minor merger with a companion system 5 times less massive. The
strong interaction phase started 7.7 Gyr ago and the final merger 1.8 Gyr ago.
