Compact Nonthermal Jets in Active Galactic Nuclei

活跃星系核中的紧凑非热喷流

• 批准号: 0098579
• 负责人: Alan Marscher
• 金额: $ 27万
• 依托单位: Trustees of Boston University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-05-01 至 2004-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0098579&HistoricalAwards=false
• 关键词: Compact; Nonthermal; Jets; Active; Galactic

AST 0098579MarscherThe spectacular jets observed to emanate from the nuclei of quasars and other active galaxies represent the most energetic long-lived phenomenon in the universe. Decades after the discovery of jets, astrophysicists are still struggling to explain how ultra-hot, magnetized,plasma is ejected into narrow beams from a system involving a black hole weighing millions or billions of suns swallowing gas from its environment. This project will explore the properties of these jets - the flow speeds (which are very close to the speed of light), the magnetic field, the energization of electrons, and wiggling of the nozzle - and how these depend on time, frequency, and energy output. These will provide clues needed to figure out the physical mechanisms that control the jets. They will be accomplished through repeated observations at radio, infrared, andoptical wavelengths with world-class telescopes to obtain images and multiple snapshots of spectra of the radiation emitted by the jets. Funding for this project was provided by the NSF program for Extragalactic Astronomy & Cosmology (AST/EXC).***

AST 0098579 Marscher观测到的从类星体和其他活动星系的核中发出的壮观喷流代表了宇宙中最具活力的长寿现象。 在发现喷流几十年后，天体物理学家仍在努力解释超热的磁化等离子体是如何从一个涉及数百万或数十亿个太阳的黑洞中喷出狭窄的光束的。该项目将探索这些射流的特性-流速（非常接近光速），磁场，电子的速度和喷嘴的摆动-以及这些如何取决于时间，频率和能量输出。这些将为弄清楚控制喷流的物理机制提供所需的线索。他们将通过无线电，红外线和光学波长的世界级望远镜重复观测来完成，以获得图像和喷射辐射光谱的多个快照。该项目的资金由美国国家科学基金会的河外天文宇宙学计划（AST/EXC）提供。