TANAMI 2 – VLBI and Multiwavelength Observations of Southern-Hemisphere AGN Jets

TANAMI 2 â VLBI 和南半球 AGN 喷流的多波长观测

• 批准号: 434448349
• 负责人: Professor Dr. Matthias Kadler
• 金额: --
• 依托单位: Dr. Remeis-Sternwarte Bamberg - Astronomisches Institut -
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/434448349?language=en
• 关键词: TANAMI; VLBI; Multiwavelength; Observations; Southern

Extragalactic jets launched from the immediate vicinity of supermassive black holes in radio-loud active galactic nuclei (AGN) are key objects in modern astronomy and astroparticle physics. AGN jets carry a fraction of the total gravitational energy released during the accretion of matter onto supermassive black holes and are prime suspects as possible sources of ultrahigh-energy cosmic rays and the recently detected high-energy extraterrestrial neutrino flux. TANAMI is a multiwavelength program monitoring AGN jets of the southern sky. It combines high-resolution imaging and spectral monitoring at radio wavelengths with higher-frequency observations at IR, optical/UV, X-ray and γ-ray energies. During TANAMI phase 1, the German contribution to this international collaborative program was partially funded by DFG. Here we propose to support the analysis of TANAMI data collected after the end of phase 1, i.e., in 21 very-long-baseline interferometry (VLBI) observing epochs and complementary multiwavelength observations between Jun 2013 and Dec 2018 and in additional epochs throughout the TANAMI 2 project duration. We will study of the physical structure and intrinsic properties of AGN jets at high angular resolution and its connection to their high-energy variability. We will further study the broadband emission processes in AGN jets and consolidate the picture regarding AGN jets as possible sources of high-energy neutrinos.

从无线电响亮的活动星系核（AGN）中的超大质量黑洞附近发射的河外喷流是现代天文学和天体粒子物理学的关键物体。活动星系核喷流携带着物质吸积到超大质量黑洞过程中释放的总引力能的一小部分，并且被认为是超高能宇宙射线和最近检测到的高能地外中微子通量的可能来源。 TANAMI 是一个监测南部天空 AGN 喷流的多波长计划。它将无线电波长的高分辨率成像和光谱监测与红外、光学/紫外、X 射线和 γ 射线能量的高频观测相结合。在 TANAMI 第一阶段期间，德国对该国际合作项目的贡献由 DFG 部分资助。在此，我们建议支持对第一阶段结束后收集的 TANAMI 数据进行分析，即 2013 年 6 月至 2018 年 12 月之间的 21 个超长基线干涉测量 (VLBI) 观测历元和补充多波长观测以及整个 TANAMI 2 项目期间的其他历元。我们将研究活动星系核喷流在高角分辨率下的物理结构和内在特性及其与高能量变化的关系。我们将进一步研究活动星系核喷流的宽带发射过程，并巩固活动星系核喷流作为高能中微子可能来源的图像。