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We present an analysis of the metallicity and star formation activities ofHII regions in the interacting system Arp 86, based on the first scientificobservation of the multi-object spectroscopy on the 2.16m Telescope at XinglongObservatory. We find that the oxygen abundance gradient in Arp 86 is flatterthan that in normal disk galaxies, which confirms that gas inflows caused bytidal forces during encounters can flatten the metallicity distributions ingalaxies. The companion galaxy NGC 7752 is currently experiencing a galaxy-widestarburst with higher surface density of star formation rate than the maingalaxy NGC 7753, which can be explained that the companion galaxy is moresusceptible to the effects of interaction than the primary. We also find thatthe galaxy 2MASX J23470758+2926531 has similar abundance and star formationproperties to NGC 7753, and may be a part of the Arp 86 system.

Metallicity and Star Formation Activities of the Interacting System Arp 86 from Observation with MOS on Xinglong 2.16m Telescope