论文标题
S0 Galaxy NGC 4143中的扩展气态磁盘
Extended Gaseous Disk in the S0 galaxy NGC 4143
论文作者
论文摘要
我们介绍了宽性星系NGC 4143的光谱研究结果 - URSA主要集群的郊区成员。使用Scorpio-2光谱仪上的6米Sao Ras望远镜观察，以及与WHT的Sauron IFU的全景光谱数据的档案数据，我们发现了一个扩展的倾斜气体磁盘，该磁盘可追溯到与中心约3.5 kpc的距离，距离旋转近似于Spin of Spin of Spin of STENLAR的距离。带有Mangal仪器的2.5 m CMO SAI MSU望远镜获得的H-Alpha和[NII] 6583发射线中的星系图像表明，发射线被冲击波激发。从Mangal数据中清楚地看到了星系恒星磁盘中缺乏的螺旋结构（H-Alpha和[Nii]），从Sauron数据中清楚地看到了[h-alpha和[nii]）。对沿半径和集成颜色的LICK指数分布的复杂分析，包括带有Galex空间望远镜的紫外线测量以及Wise Space望远镜的近红外测量结果，表明在最后10 Gyr的银河系中，Galaxy中没有恒星形成。因此，NGC 4143从其运动学中检测到的最近的外部气体积聚，不伴有恒星形成，这可能是由于气体流入到磁盘上的倾斜方向。
We present our results of the spectroscopic study of the lenticular galaxy NGC 4143 - an outskirt member of the Ursa Major cluster. Using the observations at the 6-m SAO RAS telescope with the SCORPIO-2 spectrograph and also the archive data of panoramic spectroscopy with the SAURON IFU at the WHT, we have detected an extended inclined gaseous disk which is traced up to a distance of about 3.5 kpc from the center, with a spin approximately opposite to the spin of the stellar disk. The galaxy images in the H-alpha and [NII]6583 emission lines obtained at the 2.5-m CMO SAI MSU telescope with the MaNGaL instrument have shown that the emission lines are excited by a shock wave. A spiral structure that is absent in the stellar disk of the galaxy is clearly seen in the brightness distribution of ionized-gas lines (H-alpha and [NII] from the MaNGaL data and [OIII] from the SAURON data). A complex analysis of both the Lick index distribution along the radius and of the integrated colors, including the ultraviolet measurements with the GALEX space telescope and the near-infrared measurements with the WISE space telescope, has shown that there has been no star formation in the galaxy, perhaps, for the last 10 Gyr. Thus, the recent external-gas accretion detected in NGC 4143 from its kinematics, was not accompanied by star formation, probably, due to an inclined direction of the gas inflow onto the disk.
