PAPAS: determine the actual SFR in red spirals falling into clusters.

并不是所有的红色星系都是红色和死亡的。在不松弛的星团中--像室女座--也存在红色的螺旋，显示正在进行的星星形成，被尘埃变红。为了了解星系团中的星系人口，很有意思的是要弄清楚这些尘埃红色螺旋星系是否是进入星系团势的共场星系，或者它们的星星形成是否是由穿过星系团间介质的冲压压力触发的。在我们研究得最好的星系团阿贝尔901/2中，根据Hα和UV+FIR通量确定SFR导致了相互矛盾的结果，这可能表明SF历史，但也可能是由于Hα通量的消光校正不良造成的。PANIC帕邢α巡天（PAPAS）将利用红移到K波段的帕邢α线来检验中红移星系团中Hα基的SFR。本提案旨在补充不足的2016年F2016数据。

Not all red galaxies in clusters are red and dead. In unrelaxed clusters - like Virgo – also red spirals exist that show ongoing star formation, reddened by dust. To understand the galaxy population in clusters it is intriguing to find out whether the dusty red spirals are common field galaxies in the process of entering the cluster potential or whether their star formation is triggered by ram pressure from moving across the inter-cluster medium. In our best studied cluster, Abell 901/2, the determination of the SFR from Hα and the UV+FIR flux leads to conflicting results that might indicate SF history, but could also be caused by badly corrected extinction of the Hα flux. The PAnic Paschen Alpha Survey (PAPAS) will check the Hα-based SFR in intermediate-redshift galaxy clusters by using the Paschen-α line red-shifted into the K-band. This proposal aims to complete the insufficient F2016 data.