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arXiv 1208.0069astro-ph.HEastro-ph.CO
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类星体PKS 2101-490喷流、瓣和核的多波长研究

A Multi-Wavelength Study of the Jet, Lobes and Core of the Quasar PKS 2101-490

L. E. H. Godfrey, G. V. Bicknell, J. E. J. Lovell, D. L. Jauncey, J. Gelbord, D. A. Schwartz, E. S. Perlman, H. L. Marshall, M. Birkinshaw, D. M. Worrall, M. Ge… 展开作者

L. E. H. Godfrey, G. V. Bicknell, J. E. J. Lovell, D. L. Jauncey, J. Gelbord, D. A. Schwartz, E. S. Perlman, H. L. Marshall, M. Birkinshaw, D. M. Worrall, M. Georganopoulos, D. W. Murphy

摘要:

我们提出了一个详细的研究的X射线,光学和无线电发射的喷流,叶和核心的类星体PKS 2101-490所揭示的新的钱德拉,HST和ATCA图像。我们提取的无线电X射线光谱能量分布从7个区域的13弧秒喷流,和模型的喷流X射线发射的多普勒波束逆康普顿散射的宇宙微波背景(IC/CMB)的喷流之间的粒子和磁场的能量密度均分的状态。这个模型意味着喷流在离核几百千秒差距处保持高度相对论性,体洛伦兹因子γ ~ 6,磁场为30微高斯量级。我们检测到一个明显的辐射冷却中断的同步加速器光谱的喷气节点之一,并能够解释这方面的标准的一个区域连续注入模型,根据来自IC/CMB模型的喷气参数。然而,我们注意到明显的子结构在明亮的光学结的HST带之一。我们将IC/CMB模型与喷流功率的独立估计值进行比较,发现IC/CMB模型的喷流功率与独立估计值是一致的,只要最小电子洛伦兹因子gamma_min > 50,并且结的长度明显大于喷流宽度,正如观测到的结长度的反投影所暗示的那样。

英文摘要:

We present a detailed study of the X-ray, optical and radio emission from the jet, lobes and core of the quasar PKS 2101-490 as revealed by new Chandra, HST and ATCA images. We extract the radio to X-ray spectral energy distributions from seven regions of the 13 arcsecond jet, and model the jet X-ray emission in terms of Doppler beamed inverse Compton scattering of the cosmic microwave background (IC/CMB) for a jet in a state of equipartition between particle and magnetic field energy densities. This model implies that the jet remains highly relativistic hundreds of kpc from the nucleus, with a bulk Lorentz factor Gamma ~ 6 and magnetic field of order 30 microGauss. We detect an apparent radiative cooling break in the synchrotron spectrum of one of the jet knots, and are able to interpret this in terms of a standard one-zone continuous injection model, based on jet parameters derived from the IC/CMB model. However, we note apparent substructure in the bright optical knot in one of the HST bands. We confront the IC/CMB model with independent estimates of the jet power, and find that the IC/CMB model jet power is consistent with the independent estimates, provided that the minimum electron Lorentz factor gamma_min > 50, and the knots are significantly longer than the jet width, as implied by de-projection of the observed knot lengths.

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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