搜索结果: 1-15 共查到“知识库 高能天体物理学”相关记录468条 . 查询时间(6.016 秒)
锦屏深地实验研究解决恒星中子源反应率分歧难题（图）
恒星中子源 锦屏深地实验 反应率分歧
2023/2/20
近日，中国、美国、日本和匈牙利等国家的科学家合作开展了恒星中子源反应13C(α,n)16O天体能区截面的直接测量工作，得到了该反应目前最精确的反应率数据。该研究澄清了此前国际实验数据间数倍的分歧，对于理解宇宙超铁元素的起源及丰度问题具有重要意义，相关成果于2022年9月23日在《物理评论快报》上发表。
月球代表的是一类无气体天体。早期研究认为，月球的空间环境相对简单，来自太阳的太阳风可毫无障碍地轰击向阳面月表，并在背阳面留下一个低密度、低压强的月球尾迹。然而，最近探测结果表明，月球虽无全球性的偶极场，但有广泛分布的月壳剩磁，称磁异常。一些磁异常的强度可达上百nT，可造成太阳风减速和偏转，从而降低达到月面的太阳风通量，换句话说，就是保护了月面。这种磁场保护结构在一定程度上类似地球磁层，且尺度小，称...
科研人员成功研制高效率低本底中子探测阵列（图）
恒星中子源反应 低本底 中子探测阵列
2023/2/20
近期，中国科学院近代物理研究所科研人员与四川大学、中国原子能科学研究院合作者成功研制了高效率低本底的中子探测阵列，为在锦屏深地实验室进行的恒星中子源反应13C(α,n)16O的精确测量提供了高性能的探测器系统。相关成果以封面文章的形式发表于Nuclear Science and Techniques。
中国科学院云南天文台在黑洞X射线双星中紫外/光学辐射起源研究中获进展（图）
黑洞X射线 双星 紫外/光学 辐射起源
2022/9/14
近期，中国科学院云南天文台领衔的中外合作团队通过分析黑洞X射线双星Swift J1753.5-0127在12年长期爆发期间的多波段观测数据，研究了该系统中的紫外/光学（UV/OPT）辐射机制，发现在爆发过程中，UV/OPT辐射可能是由外吸积盘的粘滞加热过程主导。该研究成果于近日在《英国皇家天文学会月刊》（Monthly Notices of the Royal Astronomical Socie...
The interstellar medium is not necessary fully ionized. When a shock propagates into the partially ionized medium, some neutral particles leak into the upstream region from the downstream region. In t...
Transition Radiation from the Neutrino-Photon Interaction in Matter
Transition Radiation the Neutrino-Photon Interaction Matter
2012/2/23
We show that, because of their effective electromagnetic interaction in matter, transition radiation is emitted whenever neutrinos goes across the boundary between two media with different indices of ...
The Unusual Temporal and Spectral Evolution of the Type IIn Supernova 2011ht
Unusual Temporal Spectral Evolution Type IIn Supernova
2012/2/23
We present very early UV to optical photometric and spectroscopic observations of the peculiar Type IIn supernova (SN) 2011ht in UGC 5460. The UV observations of the rise to peak are only the second e...
Effect of a Weak Electromagnetic Field on Particle Acceleration by a Rotating Black Hole
Weak Electromagnetic Field Particle Acceleration Rotating Black Hole
2012/2/23
We study high energy charged particle collisions near the horizon in an electromagnetic field around a rotating black hole and reveal the condition of the fine-tuning to obtain arbitrarily large cente...
Joint spectral-timing modelling of the hard lags in GX 339-4: constraints on reflection models
Joint spectral-timing modelling the hard lags GX 339-4 constraints reflection models
2012/2/23
The X-ray variations of hard state black hole X-ray binaries above 2 keV show 'hard lags', in that the variations at harder energies follow variations at softer energies, with a time-lag \tau dependin...
Double Compact Objects I: The Significance Of The Common Envelope On Merger Rates
Double Compact Objects Significance Common Envelope Merger Rates
2012/2/23
The development of gravitational wave observatories (Advanced LIGO/Virgo, Einstein Telescope) is proceeding apace, and the direct detection of gravitational waves should be imminent. The last decade o...
Discovery of the neutron star spin and orbital period from the Be/X-ray binary IGR J05414-6858 in the LMC
Discovery neutron star spin orbital the Be/X-ray binary IGR J05414-6858 the LMC
2012/2/23
The number of known Be/X-ray binaries in the Large Magellanic Cloud is small compared to the observed population of the Galaxy or the Small Magellanic Cloud. The discovery of a system in outburst prov...
Shower Center of Gravity and Hadronic Interaction Characteristics
Shower Center Gravity Hadronic Interaction Characteristics
2012/2/23
Equations for the center of gravity of the shower originated by high energy proton in the atmosphere are written and, within certain simplifications, solved for the case of logarithmically decreasing ...
A two-component jet model based on the Blandford-Znajek and Blandford-Payne processes
two-component jet model Blandford-Znajek Blandford-Payne processes
2012/2/23
We propose a two-component jet model consistent with the observations of several gamma ray bursts (GRBs) and active galactic nuclei (AGNs). The jet consists of inner and outer components, and they are...
The Gamma-Ray Blazar PKS 0208-512, a Multi-Wavelength Investigation
Gamma-Ray Blazar PKS 0208-512 Multi-Wavelength Investigation
2012/2/23
The gamma-ray blazar PKS 0208-512 has shown strong periods of flaring, at all frequencies from radio to gamma-ray. This has led to its inclusion in the TANAMI project, which tracks the jets of souther...
Fundamental Physics and Relativistic Laboratory Astrophysics with Extreme Power Lasers
Fundamental Physics Relativistic Laboratory Astrophysics Extreme Power Lasers
2012/2/23
The prospects of using extreme relativistic laser-matter interactions for laboratory astrophysics are discussed. Laser-driven process simulation of matter dynamics at ultra-high energy density is prop...