类星体HE0450-2958的狭缝和积分场光谱
Slit and integral-field optical spectroscopy of the enigmatic quasar HE0450-2958
摘要：
类星体HE 0450 -2958的兴趣是在其预期的大质量宿主没有被探测到的出版物之后产生的，导致了各种解释。本文通过VLT/VIMOS的附加VLT/FORS狭缝谱和积分场谱研究了该系统的气体和恒星成分。我们应用我们的MCS解卷积算法的狭缝光谱的类星体和扩散组件的分离，并开发了一种新的方法来删除积分场谱中的点源，允许提取速度图，窄线图像，空间分辨光谱或电离图的周围环境的HE 0450 -2958。整个系统嵌入气体中，大部分被类星体辐射场和与射电喷流相关的冲击电离。观测到的气体和恒星动力学是不相关的，揭示了一个强烈扰动的系统。尽管有更长时间的光谱观测，宿主星系仍然没有被发现。
英文摘要：
Interest in the quasar HE0450-2958 arose following the publication of the non-detection of its expected massive host, leading to various interpretations. This article investigates the gaseous and stellar contents of the system through additional VLT/FORS slit spectra and integral field spectroscopy from VLT/VIMOS. We apply our MCS deconvolution algorithm on slit spectra for the separation of the QSO and diffuse components, and develop a new method to remove the point sources in Integral Field Spectra, allowing extraction of velocity maps, narrow-line images, spatially resolved spectra or ionization diagrams of the surroundings of HE0450-2958. The whole system is embedded in gas, mostly ionized by the QSO radiation field and shocks associated with radio jets. The observed gas and star dynamics are unrelated, revealing a strongly perturbed system. Despite longer spectroscopic observations, the host galaxy remains undetected.
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