论文标题
gasp xxxix：Meerkat在A2626中狩猎水母
GASP XXXIX: MeerKAT hunts Jellyfish in A2626
论文作者
论文摘要
我们介绍了Galaxy群集A2626中六个水母候选星系（JFCG）的Meerkat Hi观察结果。六个星系JW100和JW103中的两个被确认为B波段图像的JFCG，被确认为水母星系（JFGS）。两个JFG的HI内容都低，位于群集核心中，并以非常高的速度移动（$ \ sim $ 3 $σ_{Cl} $）。其他被识别为非耶利菲鱼星系的JFCG富含浓度，形态揭示了扭曲，不对称和可能的潮汐相互作用。 A2626 JFG和其他三个从GASP样本中确认的JFG都表明，这些星系被剥离，但尚未淬火。我们在JW100中检测到类似程度（$ \ sim $ 50 kpc）的HI，HALPHA和CO尾巴。比较多相速度通道，我们在存在HALPHA发射的尾部北部没有检测到任何HI或CO发射，这可能是由于剥离的气体与ICM之间的延长相互作用所致。我们还观察到HI和CO之间的抗相关性，这暗示了HI到H2在尾巴的南部有效地转化。我们发现RPS和HI-H2转换都是原子质气体的显着耗竭通道。与尾巴相比，HI-H2转换在圆盘上更有效。
We present MeerKAT HI observations of six jellyfish candidate galaxies (JFCGs) in the galaxy cluster, A2626. Two of the six galaxies JW100 and JW103, that were identified as JFCGs from B-band images, are confirmed as jellyfish galaxies (JFGs). Both of the JFGs have low HI content, reside in the cluster core, and move at very high velocities ($\sim$ 3$σ_{cl}$). The other JFCGs, identified as non-jellyfish galaxies, are HI rich, with HI morphologies revealing warps, asymmetries, and possible tidal interactions. Both the A2626 JFGs and three other confirmed JFGs from the GASP sample show that these galaxies are HI stripped but not yet quenched. We detect HI, Halpha, and CO tails of similar extent ($\sim$ 50 kpc) in JW100. Comparing the multi-phase velocity channels, we do not detect any HI or CO emission in the northern section of the tail where Halpha emission is present, possibly due to prolonged interaction between the stripped gas and the ICM. We also observe an anti-correlation between HI and CO, which hints at an efficient conversion of HI to H2 in the southern part of the tail. We find that both RPS and HI-to-H2 conversion are significant depletion channels for atomic gas. HI-to-H2 conversion is more efficient in the disc than in the tail.
