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.

观测计划将测量超明亮红外星系（ulrgs）样本中Halpha， Hbeta和[OIII] 5007的发射线。尽管它们的尘埃含量和柱密度极高，但它们发射的Ly-alpha具有特殊的线条形状（与P-Cygni相比）。它们的Ly-alpha线轮廓显示出强烈的蓝移翼，速度可达-1000公里/秒。可能流出的激波气体是观测到的蓝移翅膀的原因。利用PMAS观测，我们将追踪电离气体的速度场，消光和电离图。利用膨胀的气壳的辐射输运码，从Halpha推断出一条本征的Ly-alpha线。通过与观测结果的比较，可以确定冲击导致ly - α产生增强的区域。