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Neutron Stars as Probes for the Structure of Dense Nuclear Matter

Neutron Stars as Probes for the Structure of Dense Nuclear Matter
中子星作为稠密核物质结构的探测器
批准号:
0457329
负责人:
Fridolin Weber
金额:
$21.0万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
2005
资助国家:
美国
项目状态:
已结题
起止时间:
2005-08-15 至 2009-07-31

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中文摘要
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英文摘要
Neutron Stars as Probes for the Structure of Dense Nuclear MatterFridolin Weber, San Diego State University, San Diego, CaliforniaNeutron stars contain matter in one of the densest forms found in theUniverse (a thimble full of such matter would have a mass of onebillion tons) which, together with the unprecedented progress inobservational astronomy, makes such stars superb astrophysicallaboratories for a broad range of fascinating physical studies. Theseinclude the exploration of nuclear processes in an environmentextremely rich of electrons and neutrons, and the formation of newstates of matter in the cores of such objects, like a plasma of quarksand gluons which is being sought at the most powerful terrestrialparticle colliders. This NSF supported research project aims atexploring such processes from observed neutron star data. It isdivided into two major activities.The first activity deals with X-ray neutron stars accreting matterfrom companions. Such neutron stars accrete typically many millionsof tons of matter per second, which hit the stellar surface at asignificant fraction of the speed of light. This leads tothermonuclear reactions on the stellar surface whose ashes gravitategradually inward, causing significant changes (e.g. nuclear fusionreactions) in the star's crust. The major goal of this activity is toexplore the impact of these thermonuclear reactions on the thermalevolution of accreting neutron stars.The second activity concerns our understanding of the fundamentalphysics realized in the ultra-dense core of neutron stars, whereneutrons and protons might be broken up into their quark constituents,creating a new state of matter known as quark matter. If quark matterexists in the cores of neutron stars, it will be a colorsuperconductor whose condensation pattern is very complex. It has alsobeen theorized that neutron stars could in fact be quark stars,objects made entirely of quark matter. In the framework of thisactivity, research on potential astrophysical signatures signaling theexistence of quark matter in "neutron" stars will be carried out.These research activities are crucial to obtain the full physicspotential of the investments that are made in astrophysical detectors,at Jefferson Lab, the Relativistic Heavy Ion Collider (RHIC), as wellas new investments that are recommended for the Rare IsotopeAccelerator (RIA).The researchers and students involved in this project will developmulti-media lectures on how stars work and present them to middleand high school students and teachers in the San Diego area.
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Equations of State of Superdense Nuclear Matter for Use in Neutron Star Merger Simulations
Quark Matter and its Role in the Evolution of Proton-Neutron Stars to Neutron Stars
Astrophysical Studies of Quark Deconfinement
Neutron Stars as Probes for the Structure of Compressed Baryonic Matter
国内基金
海外基金
基于STARS分析的渤海营养状态转换及其生态效应研究
  • 批准号:
    41906044
  • 项目类别:
    青年科学基金项目
  • 资助金额:
    25.0万元
  • 批准年份:
    2019
  • 负责人:
    辛明
  • 依托单位:
STARS-SRF信号通路在脂代谢中的分子调节机制
  • 批准号:
    31171131
  • 项目类别:
    面上项目
  • 资助金额:
    60.0万元
  • 批准年份:
    2011
  • 负责人:
    金万洙
  • 依托单位: