Accretion & Relativistic Jet Physics in Accreting Compact Objects

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。由于AGN中的相对论性喷流被怀疑在连接AGN和星系形成的反馈循环中起着重要作用，因此盘-喷流耦合的故事可能与人类如何到达这里的故事交织在一起。在突出时间尺度为~ 1-100 Myr的情况下，必须研究大量的AGN以了解整个突出周期中发生的吸积和射流物理。然而，恒星质量吸积的致密天体在几周到几十年的时间尺度上演变成整个爆发。研究这些天体的整个爆发扩展了我们对吸积和喷流物理学更广泛领域的理解。我的研究项目集中在吸积和相对论性喷流的物理学上，特别是它们在吸积致密物体中的联系。我使用这些系统的全色观测来约束吸积和相对论性喷流的物理性质。我的长期目标是精确地将喷流特性的演变与吸积盘在所有吸积机制中的光谱和时间特性的具体和详细的演变联系起来。通过这样做，我的目标是充分理解吸积和相对论射流物理，以精确地确定恒星质量和超大质量吸积致密物体在星系形成中的作用。***我的短期工作将把射流特性的演变与特定吸积盘特性联系起来，使用协调的全色观测积极吸积的恒星质量黑洞，作为跨国际设施（包括加拿大国家研究委员会或加拿大航天局共同支持的设施，如甚大阵列、阿塔卡马大型毫米波阵列和ASTROSAT天文台）和合作者的分层项目的一部分。为了更好地研究吸积恒星质量黑洞，并将我的工作扩展到其他吸积致密天体，我将开发和实施利用新的观测能力的新技术，并迅速传播新发现的吸积致密天体的知识。我将培养4名博士，2名硕士和5名本科生作为这个发现基金的一部分

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.***As relativistic jets in AGN are suspected to play an important role in the feedback cycle that links AGN and galaxy formation, the story of disk-jet coupling is likely intertwined with the story of how humans got here. With outburst timescales of ~1–100 Myr, one must study large numbers of AGN to understand the accretion and jet physics that occur during entire outburst cycles. However, stellar-mass accreting compact objects evolve through entire outbursts on timescales of weeks to decades. Studies covering entire outbursts of such objects expand our understanding of the broader field of accretion and jet physics.***My research program focuses on the physics of accretion and relativistic jets, and in particular their connection, in accreting compact objects. I use panchromatic observations of these systems to constrain the physics of accretion and relativistic jets. My long-term goal is to precisely connect the evolution of jet properties with the specific and detailed evolution of spectral and timing properties of the accretion disk across all regimes of accretion. By doing so, I aim to understand accretion and relativistic jet physics sufficiently to precisely determine the role of both stellar-mass and supermassive accreting compact objects in galaxy formation.***My short-term work will connect the evolution of jet properties to specific accretion disk properties using coordinated panchromatic observations of actively accreting stellar-mass black holes as part of a tiered set of projects across international sets of facilities (including National Research Council Canada or Canadian Space Agency co-supported facilities such as the Very Large Array, the Atacama Large Millimeter Array, and the ASTROSAT observatory) and collaborators. To better study accreting stellar-mass black holes and extend my work to other accreting compact objects, I will develop and implement new techniques that take advantage of new observational capacities and rapidly disseminate knowledge of newly discovered accreting compact objects. I will train 4 PhD, 2 MSc, and 5 undergraduate students as part of this Discovery Grant.**