We present images of extended Hα clouds associated with 14 member galaxies in the Coma cluster obtained from deep narrowband imaging observations with the Suprime-Cam at the Subaru Telescope. The parent galaxies of the extended Hα clouds are distributed farther than 0.2 Mpc from the peak of the X-ray emission of the cluster. Most of the galaxies are bluer than g – r ≈ 0.5 and they account for 57% of the blue (g – r 0.5) bright (r 17.8?mag) galaxies in the central region of the Coma cluster. They reside near the red- and blueshifted edges of the radial velocity distribution of Coma cluster member galaxies. Our findings suggest that most of the parent galaxies were recently captured by the Coma cluster potential and are now infalling toward the cluster center with their disk gas being stripped off and producing the observed Hα clouds.
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机译：我们展示了与昏迷星团中的14个成员星系相关的扩展Hα云的图像，这些图像是通过Subaru望远镜在Suprime-Cam上进行的深窄带成像观察获得的。扩展的Hα云的母星系的分布距离该团簇的X射线发射峰的距离超过0.2 Mpc。大多数星系比g – r≈0.5更蓝，占昏迷星团中心区域蓝色（g – r <0.5）亮（r <17.8？mag）星系的57％。它们位于彗形星团成员星系径向速度分布的红移和蓝移边缘附近。我们的发现表明，大多数母星系最近都被昏迷星团势能捕获，现在正朝着星团中心下落，其盘状气体被剥离并产生了观测到的Hα云。
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