PMAS Observing Campaign at the Calar Alto 3.5m Telescope: Kinematical feedback as origen of unusual Ly_ profiles in 4 ULIRGs

Calar Alto 3.5m 望远镜的 PMAS 观测活动：运动反馈是 4 个 ULIRG 中异常 Ly_ 剖面的起源

• 批准号: 327656635
• 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: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/327656635?language=en
• 关键词: PMAS; Observing; Campaign; Calar; Alto

The observing program will measure the emission lines of Halpha, Hbeta and [OIII] 5007 in a sample of ultra-luminous infrared galaxies (ULIRGs). Despite their extreme dust content and column densities, they emit Ly-alpha with peculiar line shapes (compared to P-Cygni). Their Ly-alpha line profiles exhibit strong blueshifted wings, with velocities up to -1000 km/s. Possibly outflowing, shocked gas is responsible for the observed blueshifted wings. With the PMAS observations, we will trace the velocity fields of the ionized gas, the extinction and ionization map. From Halpha, an intrinsic Ly-alpha line will be inferred using radiative transport codes of an expanding gas shell. A comparison with the observation will then allow to locate regions where shocks lead to an enhanced Ly-alpha production.

观察程序将在超光红外星系（ULIRGS）样本中测量HALPHA，HBETA和[OIII] 5007的发射线。尽管它们具有极端的灰尘含量和圆柱密度，但它们还是以特殊的线形状（与P-Cygni相比）发出Ly-Alpha。他们的Ly -Alpha线轮廓表现出强烈的蓝光机翼，速度高达-1000 km/s。可能会流出，震惊的气体是观察到的蓝光翅膀的原因。通过PMA的观测，我们将追踪离子气体，消光和电离图的速度场。从Halpha中，将使用扩展的气壳的辐射传输代码来推断固有的LY-Alpha线。然后，与观察结果进行比较将允许定位减震器导致ly-α产生增强的区域。