Metallicity and Star Formation Activities of the Interacting System Arp
  86 from Observation with MOS on Xinglong 2.16m Telescope
  We present an analysis of the metallicity and star formation activities of
HII regions in the interacting system Arp 86, based on the first scientific
observation of the multi-object spectroscopy on the 2.16m Telescope at Xinglong
Observatory. We find that the oxygen abundance gradient in Arp 86 is flatter
than that in normal disk galaxies, which confirms that gas inflows caused by
tidal forces during encounters can flatten the metallicity distributions in
galaxies. The companion galaxy NGC 7752 is currently experiencing a galaxy-wide
starburst with higher surface density of star formation rate than the main
galaxy NGC 7753, which can be explained that the companion galaxy is more
susceptible to the effects of interaction than the primary. We also find that
the galaxy 2MASX J23470758+2926531 has similar abundance and star formation
properties to NGC 7753, and may be a part of the Arp 86 system.
