Probing Accretion and Relativistic Jet Physics with the Dynamic Multimessenger Universe

用动态多信使宇宙探测吸积和相对论喷流物理

基本信息

  • 批准号:
    RGPIN-2021-04001
  • 负责人:
  • 金额:
    $ 3.64万
  • 依托单位:
  • 依托单位国家:
    加拿大
  • 项目类别:
    Discovery Grants Program - Individual
  • 财政年份:
    2021
  • 资助国家:
    加拿大
  • 起止时间:
    2021-01-01 至 2022-12-31
  • 项目状态:
    已结题

项目摘要

The physical processes by which most matter accumulates onto astrophysical objects, accretion, are intimately tied to a second set of physical processes, outflows. Astrophysicists call the most highly focused outflows "jets." Most observed jets in our Universe involve processes that accelerate populations of both individual electrons and the bulk outflow of particles to relativistic speeds (i.e., speeds near that of light). Accretion and relativistic jets lead to bright electromagnetic signals. Accretion is often bright at X--ray wavelengths. And relativistic jets are bright at near--infrared through radio wavelengths. Sources undergoing outbursts of accretion and astrophysical jets serve as beacons for both extreme-detail studies in our Galaxy and en masse, lesser-detail studies across the observable Universe. Despite knowing of such sources for more than 50 years, we still cannot answer: "What process or processes accelerate jets?; What differentiates how different types of jets are launched?; and What is the precise role of these sources in galaxy formation?". My long-term goal is to answer these critical questions that apply to objects ranging from individual stars as they are being born to black holes billions of times as massive as the Sun sitting at the centre of galaxies. Given the broad gamut of source types, understanding the connection between accretion and jets is a high--priority goal in astrophysics. Astrophysicists have recently linked astrophysical jets with the first extragalactic events that we can study with non-electromagnetic signals (e.g., signals from high-speed particles, like neutrinos, and gravitational waves). To probe the physics connecting accretion and jets and better understand multi-messenger sources, astrophysicists must measure the properties of jets and, where possible, tie these to properties of accretion. My short-term research program will exploit multiple avenues of time--domain observations across the electromagnetic spectrum to provide these data and theoretical interpretations. I will combine: 1) nearly--simultaneous timing and imaging observations across the electromagnetic spectrum of actively accreting stellar-mass black holes and neutron stars using sets of international facilities (including National Research Council of Canada or Canadian Space Agency co-supported facilities); 2) surveys that reveal the radio and X--ray properties of large numbers of astrophysical objects that will enable my group to identify the nature of these objects, constrain the properties of entire populations, and motivate detailed followup of the most extreme objects; and 3) lead the Canadian multi--messenger astrophysics community's radio response to neutrino and gravitational wave events. I will train 1 Postdoctoral Fellow, 3 Ph.D. students, 4 M.Sc students, and 5 undergraduate students. I will also host 5 South African graduate students for three-month visits to Canada for scientific training.
大多数物质积累到天体物理物体上的物理过程(吸积)与第二组物理过程(流出)密切相关。天体物理学家将最集中的外流称为“喷流”。我们宇宙中大多数观测到的喷流都涉及将单个电子和大量粒子流出加速到相对论速度(即接近光速的速度)的过程。吸积和相对论性喷流会产生明亮的电磁信号。 X射线波长下的吸积通常很明亮。相对论性喷流在近红外到射电波长范围内都很明亮。经历吸积和天体物理喷流爆发的源头既可以作为我们银河系中极端细节研究的灯塔,也可以作为整个可观测宇宙中大规模、不太详细的研究的灯塔。尽管了解这些来源已有 50 多年,但我们仍然无法回答:“什么过程加速喷流?;不同类型喷流的发射方式有何不同?;以及这些来源在星系形成中的确切作用是什么?” 。我的长期目标是回答这些关键问题,这些问题适用于从单个恒星诞生的天体,这些天体的质量是星系中心太阳的数十亿倍。考虑到源类型的广泛范围,了解吸积和喷流之间的联系是天体物理学的一个高度优先的目标。天体物理学家最近将天体物理喷流与我们可以用非电磁信号(例如来自中微子和引力波等高速粒子的信号)进行研究的第一个河外事件联系起来。为了探究连接吸积和喷流的物理原理并更好地了解多信使源,天体物理学家必须测量喷流的特性,并在可能的情况下将这些特性与吸积的特性联系起来。我的短期研究计划将利用跨电磁频谱的时域观测的多种途径来提供这些数据和理论解释。我将结合:1)使用成套国际设施(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)对主动吸积恒星质量黑洞和中子星的电磁频谱进行近乎同步的定时和成像观测; 2)揭示大量天体物理物体的无线电和X射线特性的调查,这将使我的小组能够识别这些物体的性质,限制整个群体的特性,并激发对最极端物体的详细跟踪; 3)领导加拿大多信使天体物理学界对中微子和引力波事件的无线电响应。培养博士后1名,博士3名。学生中,硕士生4人,本科生5人。我还将接待5名南非研究生到加拿大进行为期三个月的科学培训。

项目成果

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Sivakoff, Gregory其他文献

Sivakoff, Gregory的其他文献

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{{ truncateString('Sivakoff, Gregory', 18)}}的其他基金

Probing Accretion and Relativistic Jet Physics with the Dynamic Multimessenger Universe
用动态多信使宇宙探测吸积和相对论喷流物理
  • 批准号:
    RGPIN-2021-04001
  • 财政年份:
    2022
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual
Accretion & Relativistic Jet Physics in Accreting Compact Objects
吸积
  • 批准号:
    RGPIN-2016-06569
  • 财政年份:
    2020
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual
Accretion & Relativistic Jet Physics in Accreting Compact Objects
吸积
  • 批准号:
    RGPIN-2016-06569
  • 财政年份:
    2019
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual
Accretion & Relativistic Jet Physics in Accreting Compact Objects
吸积
  • 批准号:
    RGPIN-2016-06569
  • 财政年份:
    2018
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual
Accretion & Relativistic Jet Physics in Accreting Compact Objects
吸积
  • 批准号:
    RGPIN-2016-06569
  • 财政年份:
    2017
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual
Accretion & Relativistic Jet Physics in Accreting Compact Objects
吸积
  • 批准号:
    RGPIN-2016-06569
  • 财政年份:
    2016
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual

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相似海外基金

Probing Accretion and Relativistic Jet Physics with the Dynamic Multimessenger Universe
用动态多信使宇宙探测吸积和相对论喷流物理
  • 批准号:
    RGPIN-2021-04001
  • 财政年份:
    2022
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual
Accretion & Relativistic Jet Physics in Accreting Compact Objects
吸积
  • 批准号:
    RGPIN-2016-06569
  • 财政年份:
    2020
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual
Accretion & Relativistic Jet Physics in Accreting Compact Objects
吸积
  • 批准号:
    RGPIN-2016-06569
  • 财政年份:
    2019
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual
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支持 GPU 的未对准黑洞吸积系统的广义相对论模拟
  • 批准号:
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  • 财政年份:
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  • 资助金额:
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  • 项目类别:
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Accretion & Relativistic Jet Physics in Accreting Compact Objects
吸积
  • 批准号:
    RGPIN-2016-06569
  • 财政年份:
    2018
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual
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