本文介绍了利用巨型米波射电望远镜和甚大天线阵进行的多频射电观测，以及利用巨型射电源（GRS）3C 457的X射线多镜任务（{ \it XMM-Newton}）望远镜进行的X射线观测。利用X射线探测了大射电暴的核、叶和环境。我们研究无线电和X射线发射之间的关系，确定在一个大的频率范围内的无线电频谱和属性的X射线发射从叶逆康普顿散射的宇宙微波背景（CMB）光子。波瓣的磁场强度非常接近均分值。两个凸起在热点附近处于压力平衡状态，并且明显地向核心处压力不足。GRS核心的X射线光谱由未吸收的软幂律成分和被严重吸收的硬幂律成分组成。未被吸收的软成分可能与射电喷流有关。在我们的实验数据中没有发现Fe K $α$发射线的强有力证据。
英文摘要：
We present multi-frequency radio observations with the Giant Metrewave Radio Telescope and Very Large Array, and X-ray observations with the X-ray Multi-Mirror Mission ({\it XMM-Newton}) telescope of the giant radio source (GRS) 3C 457. We have detected the core, lobes and the environment of the GRS in X-ray. We examine the relationships between the radio and X-ray emission, determine the radio spectrum over a large frequency range and attribute the X-ray emission from the lobes to the inverse-Compton scattering of cosmic microwave background (CMB) photons. The magnetic field strength of the lobes is very close to the equipartition value. Both the lobes are in pressure balance near the hotspots and apparently under-pressured towards the core. The X-ray spectrum of the core of the GRS consists of an unabsorbed soft power-law component and a heavily absorbed hard power-law component. The soft unabsorbed component is likely to be related to the radio jets. There is no strong evidence of Fe K$α$ emission line in our data.
One of the exciting results of the last years concerning the study of the large-scale structure is the discovery of long (3-5 Mpc) bridges of radio emission connecting pairs of interacting clusters. This is the first direct evidence of the existence of particle acceleration and magnetic field amplification mechanisms outside galaxy clusters. Non-thermal components spread over such vast extents probe the dynamics of large-scale structures and the mechanisms of energy dissipation therein. In my talk, I will discuss recent results on radio bridges, showing how their observation represents a step …
Giant Radio Sources as a probe of the cosmological evolution of the IGM, II. The observational constraint for the model of the radio-jets propagation through the X-ray halo--IGM interface
The giant radio source 0917+75: Origin and properties
INAF - Istituto di Radioastronomia（意大利国家天体物理研究所射电天文台）；Dipartimento di Fisica e Astronomia dell’Universitá degli studi di Bologna（博洛尼亚大学物理与天文系）；Thuringer Landessternwarte（图林根州立天文台）；Dipartimento di Fisica dell’Università degli Studi di Trieste - Sezione di Astronomia（的里雅斯特大学物理系天文学部）；INAF - Osservatorio Astronomico di Trieste（意大利国家天体物理研究所的里雅斯特天文台）；Fundación Galileo Galilei - INAF (Telescopio Nazionale Galileo)（伽利略基金会-意大利国家天体物理研究所（伽利略国家望远镜））；Instituto de Astrofísica de Canarias（加那利群岛天体物理研究所）；Departamento de Astrofísica, Univ. de La Laguna（拉帕尔马大学天体物理学系）
Spectropolarimetry with the Giant Metrewave Radio Telescope at 610 MHz: a case study of two Southern Compact Group fields
我们目前610兆赫的光谱偏振图像从巨型米波射电望远镜（GMRT）。我们详细讨论了GMRT的全偏振模式的属性，并提供了仪器的偏振性能的技术表征。我们表明，该望远镜可用于宽视场分光偏振。旋转测量合成的应用导致在法拉第空间中的几十微焦的水平的灵敏度。作为该仪器的能力的演示，我们提出了两个南方契约组-鹤四重奏和USCG S 063的意见。观测结果与其他无线电和红外数据进行了比较，以限制组成员的光谱指数，偏振分数和法拉第深度。无线电连续辐射是从天鹤座四重奏中的所有四个星系和USCG S 063中的一个星系中检测到的。线性偏振是从NGC 7552的环核星暴环，NGC 7582的活动核和三个扩展的射电星系在天鹤座四重奏场的背景中检测到的。这些背景源允许分类FR-I和X形射电星系。没有证据表明，在任何星系群与群内介质的相互作用。
The very careful Event Horizon Telescope estimate of the mass of the supermassive black hole at the center of the Giant CD galaxy M87, allied with recent high quality photometric and spectroscopic measurements, yields a proper dark/luminous mass decomposition from the galaxy center to its virial radius. That provides us with decisive information on crucial cosmological and astrophysical issues. The dark and the standard matter distributions in a wide first time detected galaxy region under the supermassive black hole gravitational control. The well known supermassive black hole mass vs stellar…
