Observations and Analysis of Exotic Gravitational Microlensing Events

奇异引力微透镜事件的观测与分析

基本信息

  • 批准号:
    0206189
  • 负责人:
  • 金额:
    $ 27万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    2002
  • 资助国家:
    美国
  • 起止时间:
    2002-08-01 至 2007-07-31
  • 项目状态:
    已结题

项目摘要

AST 0206189BennettThis award supports the investigations of Dr. David Bennett and Dr. Sun Hong Rhie, at Notre Dame University, into "exotic" gravitational microlensing events. Exotic events deviate from the standard gravitational microlensing light curve which assumes a point source, and single point lens, and constant velocities for the source, lens, and observer. These exotic events are particularly useful because they yield much more information about the distance and mass of the lens object than standard microlensing light curves. The study of these exotic microlensing events will address such issues as the possibility that a substantial fraction of the Milky Way's dark matter is composed of very old and cool white dwarfs, the abundance of isolated stellar mass black holes in the Milky Way disk, mass measurements of single stars at distances of kiloparsecs from Earth, and the abundance of low-mass giant planets in Jupiter-like orbits about stars in the Galactic disk and bulge. The work will have a significant impact on our understanding of the structure and composition of our Galaxy, the fundamental properties of stars and stellar remnants, and the basic mechanism of planet formation. This project will involve observations, data analysis, and some theoretical work. The observational effort will focus primarily on microlensing follow-up observations that will take advantage of the tremendous increase in real-time microlensing event discoveries expected from the OGLE-III and Super-MACHO projects which have just begun taking data. The observations will be done with the Boyden Observatory 1.5m telescope in South Africa, which has recently been refurbished for this observing program, as well as with the Mt. Stromlo 1.9m telescope, in Australia that has been used previously. The follow-up program will be done in cooperation with an Ohio State University group which will make a substantial contribution to the Mt. Stromlo 1.9m observations, and has near dedicated access to the CTIO 1.5m telescope in Chile. The combined resources of the Notre Dame and Ohio State groups will yield 24-hour coverage of microlensing events. This is necessary in order to mount a microlensing planet search program that will be sensitive to planets down to the mass of Neptune in Jupiter-like orbits. The observations will enable a stringent test of the "core accretion" model for planet formation. This microlensing follow-up program will also focus on the study of microlensing parallax events which can reveal isolated black holes. Follow-up observations of Large Magellanic Cloud (LMC) microlensing events discovered primarily by the Super-MACHO Project will yield "exotic" microlensing event features which will allow the determination of the lens distances for a statistically significant subset of events. This will determine if most of the LMC microlensing events are due to a part of the Milky Way's dark matter, or whether they are due to lensing by ordinary stars in the LMC. This award will also support a theoretical effort to evaluate potential future microlensing programs which might study dark matter in distance galaxies or terrestrial planets in our own Galaxy. ***
AST 0206189 Bennett该奖项支持圣母大学的大卫班尼特博士和孙洪瑞博士对“奇异”引力微透镜事件的研究。奇异事件偏离了标准的引力微透镜光变曲线,该光变曲线假设点源和单点透镜,并且源、透镜和观察者的速度恒定。这些奇异事件特别有用,因为它们比标准的微透镜光变曲线产生更多关于透镜物体的距离和质量的信息。对这些奇异的微透镜现象的研究将解决这样的问题,即银河系暗物质的很大一部分可能是由非常古老和冷却的白色矮星组成的,银河系盘中孤立的恒星质量黑洞的丰度,在千秒差距距离上测量单个恒星的质量 以及大量的低质量巨行星,它们围绕着银河系盘和凸起中的恒星运行,轨道类似于彗星。这项工作将对我们理解银河系的结构和组成、恒星和恒星残骸的基本性质以及行星形成的基本机制产生重大影响。该项目将涉及观察,数据分析和一些理论工作。观测工作将主要集中在微透镜后续观测上,这将利用OGLE-III和Super-OOO项目所预期的实时微透镜事件发现的巨大增加,这些项目刚刚开始收集数据。观测将使用南非的Boyden天文台1.5米望远镜进行,该望远镜最近已经为该观测计划进行了翻新,以及Mt。Stromlo 1.9米望远镜,位于澳大利亚,以前曾使用过。后续方案将与俄亥俄州州立大学的一个小组合作进行,该小组将为山项目作出实质性贡献。Stromlo 1.9米观测,并有近专用访问CTIO 1.5米望远镜在智利。圣母院和俄亥俄州团体的综合资源将产生24小时的微透镜事件报道。这是必要的,以便安装一个微透镜行星搜索计划,该计划将对在类海王星轨道上的行星敏感。这些观测将使行星形成的“核心吸积”模型得到严格的检验。这个微透镜后续计划还将专注于研究可以揭示孤立黑洞的微透镜视差事件。后续观测的大麦哲伦云(LMC)微透镜事件发现的主要是由超级天文台项目将产生“异国情调”的微透镜事件的功能,这将允许确定的透镜距离的一个统计上显着的事件子集。这将决定大麦哲伦星系的微透镜现象是否是由于银河系的暗物质的一部分,或者它们是否是由于大麦哲伦星系中普通恒星的透镜效应。该奖项还将支持理论上的努力,以评估未来可能研究远距离星系或我们银河系中的类地行星中的暗物质的微透镜计划。***

项目成果

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David Bennett其他文献

Detailed assessment of cognition and activities of daily living in moderate to severe Alzheimer's disease
详细评估中度至重度阿尔茨海默病的认知和日常生活活动
  • DOI:
    10.1016/s0197-4580(00)82096-5
  • 发表时间:
    2000
  • 期刊:
  • 影响因子:
    4.2
  • 作者:
    D. Galasko;F. Schmitt;Shelia Jin;J. Saxton;David Bennett;M. Sano;S. Ferris
  • 通讯作者:
    S. Ferris
The MOA Project 2013 Observing Season
MOA项目2013年观测季
  • DOI:
  • 发表时间:
    2014
  • 期刊:
  • 影响因子:
    0
  • 作者:
    David Bennett;MOA Collaboration
  • 通讯作者:
    MOA Collaboration
Specific alterations of tau phosphorylation and neuronal signaling induced by the amyloid-β oligomer Aβ*56
  • DOI:
    10.1016/j.neurobiolaging.2016.01.117
  • 发表时间:
    2016-03-01
  • 期刊:
  • 影响因子:
  • 作者:
    Sylvain Lesne;Fatou Amar;Mathew Sherman;Travis Rush;Megan Larson;Liu Chang;Jürgen Götz;Julie Schneider;David Bennett;Karen Ashe;Alain Buisson
  • 通讯作者:
    Alain Buisson
Kiosk 5R-TC-07 - Repeatability and Reliability of Flow Quantification in Aorta and Abdominal Arteries by 2D PC-MRI
5R-TC-07 自助服务终端 - 二维 PC-MRI 对主动脉和腹主动脉血流定量的重复性和可靠性
  • DOI:
    10.1016/j.jocmr.2024.100702
  • 发表时间:
    2024-03-01
  • 期刊:
  • 影响因子:
    6.100
  • 作者:
    Preethi Chandrasekaran;Juliet Varghese;Harmony Nguyen;Jianing Ma;Jing Peng;Rohit Sood;Paul Wilkens;David Bennett;Orlando Simonetti;Matthew Tong
  • 通讯作者:
    Matthew Tong
Translational research into causes of neuropathic pain
  • DOI:
    10.1016/j.jns.2023.120989
  • 发表时间:
    2023-12-01
  • 期刊:
  • 影响因子:
  • 作者:
    David Bennett
  • 通讯作者:
    David Bennett

David Bennett的其他文献

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{{ truncateString('David Bennett', 18)}}的其他基金

MICA: Partnership for Assessment and Investigation of Neuropathic Pain: Studies Tracking Outcomes, Risks and Mechanisms (PAINSTORM).
MICA:神经病理性疼痛评估和调查伙伴关系:跟踪结果、风险和机制的研究 (PAINSTORM)。
  • 批准号:
    MR/W002388/1
  • 财政年份:
    2021
  • 资助金额:
    $ 27万
  • 项目类别:
    Research Grant
Defining the primary afferent circuitry that drives neuropathic pain
定义驱动神经性疼痛的主要传入回路
  • 批准号:
    MR/T020113/1
  • 财政年份:
    2020
  • 资助金额:
    $ 27万
  • 项目类别:
    Research Grant
Using human IPSC derived nociceptors as a cellular model to investigate and therapeutically target Nav1.7
使用人类 IPSC 衍生的伤害感受器作为细胞模型来研究和治疗靶向 Nav1.7
  • 批准号:
    BB/S006788/1
  • 财政年份:
    2019
  • 资助金额:
    $ 27万
  • 项目类别:
    Research Grant
The role of CASPR2 in regulating sensory neuronal excitability and chronic pain
CASPR2在调节感觉神经元兴奋性和慢性疼痛中的作用
  • 批准号:
    MR/M02394X/1
  • 财政年份:
    2015
  • 资助金额:
    $ 27万
  • 项目类别:
    Research Grant
Cold and Possibly Unbound Planets from Wide-Field Microlensing Surveys
广域微透镜勘测中的寒冷且可能未束缚的行星
  • 批准号:
    1211875
  • 财政年份:
    2012
  • 资助金额:
    $ 27万
  • 项目类别:
    Standard Grant
CNH: People, Water, and Climate: Adaptation and Resilience in Agricultural Watersheds
CNH:人、水和气候:农业流域的适应和恢复力
  • 批准号:
    1114978
  • 财政年份:
    2011
  • 资助金额:
    $ 27万
  • 项目类别:
    Standard Grant
Next Generation Microlensing Planet Search Analysis and Observations
下一代微透镜行星搜索分析和观测
  • 批准号:
    1009621
  • 财政年份:
    2010
  • 资助金额:
    $ 27万
  • 项目类别:
    Standard Grant
Analysis and Interpretation of Planetary Gravitational Microlensing Events
行星引力微透镜事件的分析和解释
  • 批准号:
    0708890
  • 财政年份:
    2007
  • 资助金额:
    $ 27万
  • 项目类别:
    Standard Grant
HSD: Collaborative Research: Social Complexity and the Management of the Commons
HSD:合作研究:社会复杂性和公地管理
  • 批准号:
    0624297
  • 财政年份:
    2006
  • 资助金额:
    $ 27万
  • 项目类别:
    Standard Grant
A Search for Extra-Solar Planets via Gravitational Microlensing
通过引力微透镜寻找太阳系外行星
  • 批准号:
    9619575
  • 财政年份:
    1997
  • 资助金额:
    $ 27万
  • 项目类别:
    Continuing Grant

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