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

并不是所有星系团中的红色星系都是红色的和死亡的。在不松弛的星团中--如处女座--也存在红色螺旋，显示正在形成的恒星因尘埃而变红。为了了解星系团中的星系群，人们很想知道尘埃状的红色螺旋星系是处于进入星系势的过程中的普通场星系，还是它们的恒星形成是由穿越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Abell901/2中，从Hα和UV+FIR通量确定SFR导致了相互矛盾的结果，这些结果可能表明SF历史，但也可能是由于Hα通量的严重校正消光造成的。Panic Paschen Alpha巡天(PAPAS)将通过使用红移到K波段的Paschen-α线来检查中等红移星系团中基于H-α的SFR。这项提案旨在完善F2016财年数据不足的问题。

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.