PMAS observing campaign at Calar Alto 3.5m Telescope "Ionised haloes in the Lyman Alpha Reference Sample"

Calar Alto 3.5m 望远镜的 PMAS 观测活动“莱曼阿尔法参考样本中的电离光环”

• 批准号: 405328121
• 负责人: Professor Dr. Martin Matthias Roth
• 金额: --
• 依托单位: Leibniz-Institut für Astrophysik Potsdam (AIP)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/405328121?language=en
• 关键词: PMAS; observing; campaign; Calar; Alto

Ly-alpha is a prime target in high-z surveys studying cosmology and galaxy formation, but Ly-alpha radiative transfer physics complicate the interpretation of those samples. We already demonstrated that PMAS Halpha kinematic maps in concert with UV imaging-, UV spectroscopy and 21cm HI observations are vital to build a coherent empirical picture of Lyalpha radiative transfer in galaxies. Spectrophotometry of galaxies in Halpha trace directly the intrinsic Lyalpha radiation field and thus constrain the initial conditions of the Lyalpha radiative transfer. The existing PMAS/LARR data are limited in field of view and wavelength coverage and does not capture the full ionised haloes. Here we propose a pilot study to map the ionised gas extent, traced by Halpha and [OIII], of LARS with PMAS/PPAK.

在研究宇宙学和星系形成的高z巡天中，Ly-alpha是一个主要目标，但Ly-alpha辐射传输物理学使这些样本的解释复杂化。我们已经证明，PMAS Halpha运动学图与紫外成像、紫外光谱和21cm HI观测相一致，对于建立星系中Lyalpha辐射转移的连贯经验图像至关重要。半星星系的分光光度法直接追踪了Lyalpha的本征辐射场，从而约束了Lyalpha辐射转移的初始条件。现有的PMAS/LARR数据在视场和波长覆盖范围上是有限的，并且不能捕捉到完全电离的光晕。在这里，我们提出了一项试点研究，用PMAS/PPAK绘制LARS的电离气体范围，由Halpha和[OIII]追踪。