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arXiv astro-ph/0103462astro-ph
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QSO宿主星系发射线气体的空间分辨光谱

Spatially resolved spectroscopy of emission-line gas in QSO Host galaxies

Andrew Sheinis

摘要:

本文给出了3C249.1、3C273和3C323.1等3个射电大类星体的离核光谱,这是由凯克天文台的小阶梯光栅摄谱仪和成像仪(ESI)拍摄的。从这些光谱中,我们已经提取了沿[OIII],$λ= \textsf{5007}$线的狭缝的空间分布。拟合高斯分布到这些配置文件中的每一个显示发射线气体从星系核到几十千秒差距。大多数观测显示,几种气体成分具有不同的速度和速度分散,其中大部分都高于任何合理质量星系的逃逸速度。此外,我们还展示了另一个物体3C48的无缝光谱图像。从无狭缝光谱图像,我们可以提取二维空间以及速度信息的发射线气体。

英文摘要:

We present off-nuclear spectra of 3 radio loud QSO's, 3C249.1, 3C273 and 3C323.1., taken with the echellette spectrograph and imager (ESI) at Keck observatory. From these spectra we have extracted the spatial profile along the slit of the [OIII], $λ= \textsf{5007}$ line. Fitted Gaussian distributions to each of these profiles show emission-line gas out to several tens of kiloparsecs from the galaxy nucleus. Most observations show several gas components at distinct velocities and velocity dispersions, much of which is above the escape velocity for any resonable mass galaxy. In addition, we show slitless spectroscopy images for one other object, 3C48. From the slitless spectroscopy images we can extract 2-dimensional spatial as well as velocity information on the emission line gas.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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