The Structure and Evolution of Low-Mass Stars
低质量恒星的结构和演化
基本信息
- 批准号:9023775
- 负责人:
- 金额:$ 19.5万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:1991
- 资助国家:美国
- 起止时间:1991-04-01 至 1994-09-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
For a few decades after Robert Oppenheimer's 1939 announcement of the probable existence of "neutron stars", the field of neutron star astronomy was arguably held back by a lack of understanding of what such objects would look like if astronomers on Earth looked in their direction. Studies have found that nonmagnetic neutron stars reveal their presence by emitting high energy radiation in response to primarily matter falling onto them from an orbiting companion star. The Principal Investigator (PI) proposes a series of theoretical investigations that would predict the radiation emitted a matter-accretion process. He suspects that the response is reponsible for the pulses of x-ray and gamma ray radiation recently detected by balloon and space-borne high energy experiments. The PI hopes to confirm or refute this idea by his modeling of what these "signatures" of a brief radiation-driven wind would look like. He anticipates further that these events can be used to estimate the masses and radii of neutron stars directly, which has not been possible up to now. In addition, he points out that a knowledge of high energy signatures from accretion events may be essential in the interpretation of data from several x- and gamma-ray space missions now being planned. Finally, the PI wishes to examine the spiralling in of neutron stars in decaying orbits around one another. This process would proceed so fast (within seconds) that it can be fairly described as a "neutron star collision". Much of the gravitational energy liberated in a collision would be emitted in a brief burst of gravitational radiation. It is possible that such events could be a major source of any gravitational radiation detected on Earth. ***//
1939年罗伯特·奥本海默(Robert Oppenheimer)宣布“中子星”可能存在之后的几十年里,中子星天文学领域一直处于停滞状态,原因是缺乏对地球上的天文学家朝中子星方向观察时中子星会是什么样子的理解。研究发现,非磁性中子星通过发射高能量辐射来回应轨道伴星落在它们身上的主要物质,从而揭示它们的存在。首席研究员(PI)提出了一系列理论研究,以预测物质吸积过程中发出的辐射。他怀疑这种反应是最近气球和太空高能实验探测到的x射线和伽马射线辐射脉冲的原因。PI希望通过他对短暂辐射驱动风的这些“特征”的建模来证实或反驳这一观点。他进一步预测,这些事件可以用来直接估计中子星的质量和半径,这在目前是不可能的。此外,他还指出,对吸积事件高能特征的了解可能对解释目前正在计划的几个x射线和伽马射线太空任务的数据至关重要。最后,PI希望研究中子星在彼此环绕的衰变轨道上的螺旋运动。这个过程进行得如此之快(几秒钟内),以至于它可以被公平地描述为“中子星碰撞”。在碰撞中释放的大部分引力能将以短暂的引力辐射爆发的形式释放出来。这类事件有可能是地球上探测到的任何引力辐射的主要来源。* * * / /
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Bohdan Paczynski其他文献
Cluster AgeS Experiment: The Age and Distance of the Globular Cluster ω Centauri Determined from Observations of the Eclipsing Binary OGLEGC 17
星团年龄实验:根据食双星 OGLEGC 17 的观测确定球状星团 ω Centauri 的年龄和距离
- DOI:
10.1086/321084 - 发表时间:
2000 - 期刊:
- 影响因子:0
- 作者:
I. Thompson;I. Thompson;J. Kaluzny;W. Pych;Gregory S. Burley;W. Krzemiński;Bohdan Paczynski;S. E. Persson;G. Preston - 通讯作者:
G. Preston
A problem of distance
一个距离的问题
- DOI:
10.1038/427299a - 发表时间:
2004-01-22 - 期刊:
- 影响因子:48.500
- 作者:
Bohdan Paczynski - 通讯作者:
Bohdan Paczynski
The devil is in the distance
恶魔在远处。
- DOI:
10.1038/43794 - 发表时间:
1999-09-23 - 期刊:
- 影响因子:48.500
- 作者:
Bohdan Paczynski - 通讯作者:
Bohdan Paczynski
Evolutionary history of the 6.1-ms pulsar
6.1 毫秒脉冲星的演化历史
- DOI:
10.1038/304421a0 - 发表时间:
1983-08-04 - 期刊:
- 影响因子:48.500
- 作者:
Bohdan Paczynski - 通讯作者:
Bohdan Paczynski
A problem of distance
一个距离的问题
- DOI:
10.1038/427299a - 发表时间:
2004-01-22 - 期刊:
- 影响因子:48.500
- 作者:
Bohdan Paczynski - 通讯作者:
Bohdan Paczynski
Bohdan Paczynski的其他文献
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{{ truncateString('Bohdan Paczynski', 18)}}的其他基金
Optical Gravitational Lensing Experiment, Phase III
光学引力透镜实验,第三阶段
- 批准号:
0607070 - 财政年份:2006
- 资助金额:
$ 19.5万 - 项目类别:
Standard Grant
Optical Gravitational Lensing Experiment
光学引力透镜实验
- 批准号:
0204908 - 财政年份:2002
- 资助金额:
$ 19.5万 - 项目类别:
Continuing Grant
Collaborative Project: Distances and Ages from Detached Eclipsing Binary Stars
合作项目:分离食双星的距离和年龄
- 批准号:
9819787 - 财政年份:1999
- 资助金额:
$ 19.5万 - 项目类别:
Continuing Grant
The Optical Gravitational Lensing Experiment
光学引力透镜实验
- 批准号:
9820314 - 财政年份:1999
- 资助金额:
$ 19.5万 - 项目类别:
Continuing Grant
The Optical Gravitational Lensing Experiment
光学引力透镜实验
- 批准号:
9530478 - 财政年份:1996
- 资助金额:
$ 19.5万 - 项目类别:
Continuing Grant
Distances and Ages With Detached Binaries
分离二进制文件的距离和年龄
- 批准号:
9528096 - 财政年份:1996
- 资助金额:
$ 19.5万 - 项目类别:
Continuing Grant
Collaborative Project: Gravitational Microlensing of the Galactic Bulge Stars
合作项目:银河核核恒星的引力微透镜
- 批准号:
9216494 - 财政年份:1993
- 资助金额:
$ 19.5万 - 项目类别:
Standard Grant
Supermassive Black Holes in Galactic Nuclei
星系核中的超大质量黑洞
- 批准号:
9313620 - 财政年份:1993
- 资助金额:
$ 19.5万 - 项目类别:
Continuing Grant
The Structure and Evolution of Low-Mass Stars
低质量恒星的结构和演化
- 批准号:
8718432 - 财政年份:1988
- 资助金额:
$ 19.5万 - 项目类别:
Continuing Grant
The Structure and Evolution of Low-Mass Stars
低质量恒星的结构和演化
- 批准号:
8519552 - 财政年份:1986
- 资助金额:
$ 19.5万 - 项目类别:
Continuing Grant
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