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arXiv 0704.3581astro-ph
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为射电星系的中央引擎提供燃料。I. 4C 31.04的分子/尘埃盘

Fueling the central engine of radio galaxies. I. The molecular/dusty disk of 4C 31.04

S. Garcia-Burillo, F. Combes, R. Neri, A. Fuente, A. Usero, S. Leon, J. Lim

摘要:

本文报道了利用IRAM Plateau de Bure干涉仪(PdBI)进行的高分辨率(0.5“--1.2”)观测发现的一个大质量(M(气体)> 5 × 10^9 Msun)分子/尘埃盘,其大小为1.4kpc,为致密对称天体(CSO)4C31.04的中央发动机提供燃料。这些观测允许第一次检测和映射的连续辐射尘埃在218 GHz的光盘的CSO。一个巨大的磁盘的情况下,证实了强HCO+(1- 0)线发射和吸收的检测。4C31.04的分子气体质量在0.5x10^10- 5x10^10 Msun之间。虽然气体的分布和运动学大致对应的旋转磁盘,我们发现的扭曲和非圆运动的证据表明,磁盘是不是在一个动态放松状态。我们讨论的影响,这些结果的射电星系的演化的一般理解。

英文摘要:

We report the detection of a massive (M(gas) > 5x10^9 Msun) molecular/dusty disk of 1.4kpc-size fueling the central engine of the Compact Symmetric Object (CSO) 4C31.04 based on high-resolution (0.5''--1.2'') observations done with the IRAM Plateau de Bure interferometer (PdBI). These observations allow for the first time to detect and map the continuum emission from dust at 218GHz in the disk of a CSO. The case for a massive disk is confirmed by the detection of strong HCO+(1--0) line emission and absorption. The molecular gas mass of 4C31.04 is in the range 0.5x10^10--5x10^10Msun. While the distribution and kinematics of the gas correspond roughly to those of a rotating disk, we find evidence of distortions and non-circular motions suggesting that the disk is not in a dynamically relaxed state. We discuss the implications of these results for the general understanding of the evolution of radio galaxies.

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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