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

Metallicity and star formation activities of the interacting system Arp 86 from observations with MOS on the Xinglong 2.16 m telescope
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兴隆2.16 m望远镜MOS观测中相互作用系统Arp 86的金属丰度和恒星形成活动

DOI:
10.1088/1674-4527/14/11/003
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发表时间:
2014-04
影响因子:
1.8
通讯作者:
Zhu, Yi-Nan
Zhu, Yi-Nan
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Zhou, Zhi-Zhong;Jia, Jun-Jun;Lam, Man-I;Zhu, Yi-Nan

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本文根据兴隆天文台2.16米望远镜的首次多目标光谱观测资料,分析了相互作用系统阿普86中H Ⅱ区的金属丰度和星星形成活动。我们发现阿普86中的氧丰度梯度比正常盘状星系中的氧丰度梯度要平坦,这证实了碰撞过程中潮汐力引起的气体流入可以使星系中的金属丰度分布变平。伴星系NGC 7752目前正在经历一个星系范围的星暴,其星星形成率表面密度比主星系NGC 7753高,这可以解释为伴星系比主星系更容易受到相互作用的影响。我们还发现星系2MASX J23470758+2926531与NGC 7753具有相似的丰度和星星形成性质,可能是阿普86系统的一部分。
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 multi-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 formation 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 abundance and star formation properties to NGC 7753, and may be a part of the Arp 86 system.
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