Metallicity and star formation activities of the interacting system Arp 86 from observations with MOS on the Xinglong 2.16m telescope

作     者：Zhi-Min Zhou Hong Wu Lei Huang Hong-Bin Li Zhi-Zhong Zhou Jun-Jun Jia Man-I Lam Yi-Nan Zhu 

作者机构：Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of Sciences Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2014年第14卷第11期

页      面：1393-1405页

核心收录：

学科分类：07[理学] 08[工学] 070401[理学-天体物理] 0835[工学-软件工程] 0704[理学-天文学] 081202[工学-计算机软件与理论] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：Supported by the National Natural Science Foundation of China 

主　　题：galaxies abundances -- galaxies evolution -- galaxies interactions --(ISM:) H II regions -- techniques spectroscopic 

摘      要：We present an analysis of the metallicity and star formation activities of H II regions in the interacting system Arp 86, based on the first scientific observations using mulri-object spectroscopy with the 2.16 m telescope at the Xinglong Observing Station. 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 a higher star for- marion rate surface density than the main galaxy NGC 7753, which can be explained in 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 abun- dance and star formation properties to NGC 7753, and may be a part of the Arp 86 system.