A. Tolamatti, Krishna Kumar Singh, Kuldeep Kumar Yadav
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引用次数: 0
摘要
我们报告了位于 z > 0.4 以上高红移位置的 γ 射线类炽星的中心引擎的特性,银河系外背景光(EBL)开始影响它们的 γ 射线光谱。为极高测光度的类星体提供能量的物理引擎被假定为一个高度准直的物质射流,它从位于宿主星系中心区域的超大质量黑洞(SMBH)向地球方向作相对论运动。由于其奇特的几何形状和特殊的物理条件,红移超过 z > 0.4 的类星体亮度足以在 γ 射线能段中被探测到。在这项工作中,我们研究了费米卫星上的大面积望远镜(LAT)探测到的高 z γ 射线闪烁星的物理特性。我们还研究了它们的发射区和中心引擎的性质,并讨论了它们对宇宙学和天体物理学的影响。
Central Engine and Spectral Energy Distribution Properties of High Redshift Gamma Ray Blazars
We report on the properties of central engines in the γ-ray blazars located at high redshifts beyond z > 0.4, where the extra-galactic background light (EBL) starts affecting their γ-ray spectra. The physical engine that provides power to the blazars of very high bolometric luminosity is assumed to be a highly collimated jet of matter moving relativistically away from the supermassive black hole (SMBH), located in the central region of the host galaxy, in a direction aligned toward the Earth. Due to their peculiar geometry and special physical conditions, blazars at redshifts beyond z > 0.4 are bright enough to be detected in the γ-ray energy band. In this work, we investigate the physical properties of high-z γ-ray blazars detected by the Large Area Telescope (LAT) on board the Fermi satellite. We also study the properties of their emission regions and the central engines and discuss cosmological and astrophysical implications.
GalaxiesPhysics and Astronomy-Astronomy and Astrophysics
CiteScore
4.90
自引率
12.00%
发文量
100
审稿时长
11 weeks
期刊介绍:
Es una revista internacional de acceso abierto revisada por pares que proporciona un foro avanzado para estudios relacionados con astronomía, astrofísica y cosmología. Areas temáticas Astronomía Astrofísica Cosmología Astronomía observacional: radio, infrarrojo, óptico, rayos X, neutrino, etc. Ciencia planetaria Equipos y tecnologías de astronomía. Ingeniería Aeroespacial Análisis de datos astronómicos. Astroquímica y Astrobiología. Arqueoastronomía Historia de la astronomía y cosmología. Problemas filosóficos en cosmología.