用Gemini Laser -自适应光学积分场光谱学观测射电星系3C 230
Radio Galaxy 3C 230 Observed with Gemini Laser-Adaptive-Optics Integral-Field Spectroscopy
摘要：
利用Altair激光导星自适应光学装置和双子座北星上的近红外积分场光谱仪（NIFS）研究了z=1.5的3C 230的形态和运动学，这是首次对高红移射电星系的观测。这表明，一个双极流出跨越0 - 9（约16 kpc的投影距离为标准的EMDA-CDM宇宙学）达到平均相对速度为235公里/秒的红移H-α + [NII]和[SII]的排放。结构分辨率为0 - 1（0.8 kpc），与哈勃太空望远镜的光学图像和以类似空间分辨率获得的甚大阵射电图有很好的相关性。谱线诊断表明，在活动星系核活动的10^7年到10^8年期间，气体以与恒星形成相当的速率被喷射到明亮的湍流叶中，尽管气体可能只占星系重子质量的1%。
英文摘要：
The Altair laser-guide-star adaptive optics facility combined with the Near-Infrared Integral Field Spectrometer (NIFS) on Gemini North have been employed to study the morphology and kinematics of 3C 230 at z=1.5, the first such observations of a high-redshift radio galaxy. These suggest a bi-polar outflow spanning 0"9 (~16 kpc projected distance for a standard lambda-CDM cosmology) reaching a mean relative velocity of 235 km/s in redshifted H-alpha + [NII] and [SII] emission. Structure is resolved to 0"1 (0.8 kpc), well correlated with optical images from the Hubble Space Telescope and Very Large Array radio maps obtained at similar spatial resolution. Line diagnostics suggest that over the 10^7 yr to 10^8 yr duration of its AGN activity, gas has been ejected into bright turbulent lobes at rates comparable to star formation, although constituting perhaps only 1 percent of the baryonic mass in the galaxy.
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