Accretion & Relativistic Jet Physics in Accreting Compact Objects

吸积

• 批准号: RGPIN-2016-06569
• 负责人: Sivakoff, Gregory
• 金额: $ 1.97万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=633396
• 关键词: Accretion; Relativistic; Jet; Physics; Accreting

The accretion disk process, where matter tends to fall onto an object through a rotating disk, is universal. Astronomers have observed accretion disks in the precursors to stellar systems, around the compact remnants of stars (accreting white dwarfs, neutron stars, and stellar-mass black holes), and at the centres of galaxies with supermassive black holes (active galactic nuclei, AGN). This inflow of material through a disk is also associated with an outflow of material. These outflows can arise as disk-winds, non-relativistic jets, and, in the case of accreting compact objects, relativistic jets. Despite this universality, there are still many open issues in our understanding of accretion and jet physics.

吸积盘过程是普遍存在的，物质倾向于通过旋转的圆盘落在物体上。天文学家已经在恒星系统的前体、紧凑的恒星残骸（吸积白矮星、中子星和恒星质量黑洞）周围以及具有超大质量黑洞的星系中心（活动星系核，AGN）观察到吸积盘。物质通过圆盘流入也与物质流出有关。这些喷流可以以盘风、非相对论性喷流的形式出现，在吸积致密物体的情况下，还可以以相对论性喷流的形式出现。尽管具有这种普遍性，但我们对吸积和喷流物理的理解仍有许多悬而未决的问题。