搜索结果: 1-12 共查到“天文学 GEV”相关记录12条 . 查询时间(0.046 秒)
广西大学物理科学与工程技术学院硕士研究生顾莹等证认一个可能具有GeV能区光子辐射的年轻活动星系核的相关进展（图）
射电星系 高能光子辐射 GeV辐射 射电平谱类星体
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2022/6/28
年轻活动星系核高能辐射是研究其早期喷流、中心超大质量黑洞及其吸积盘的重要探针。目前，普遍认为致密陡谱源(Compact steep-spectrum sources，CSSs)代表较早期的射电星系，目前仅有少数几个事例发现具有高能光子辐射。广西大学物理科学与工程技术学院硕士生顾莹与北京理工大学、南京大学合作，研究CSSs源4C39.23B与伽马射线源4FGL J0824.9+3915成协的可能性。...
上海交通大学盛政明、陈民教授团队《Science Advances》发表最新成果—基于激光等离子体加速器的极高亮度GeV伽马射线（图）
上海交通大学 盛政明 陈民 激光 等离子体 加速器 极高亮度 GeV伽马射线
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2020/6/16
近日，上海交通大学盛政明教授和陈民教授团队在美国《科学》杂志子刊[Science Advances 6, eaaz7240 (2020)]上以“Extremely brilliant GeV γ-rays from a two-stage laser-plasma accelerator”为题发表最新研究成果，提出了一种利用两级激光等离子体加速器产生极高亮度GeV伽马射线辐射的新方案。该研究方案有...
中国科学院紫金山天文台发现最遥远的GeV辐射源候选体（图）
中国科学院紫金山天文台 最遥远 GeV辐射源 候选体
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2018/10/11
高红移宇宙一直是天文学家关心的热点领域，活动星系核作为宇宙中最明亮的稳定电磁波辐射源之一，是少许研究高红移宇宙的有效探针。耀变体，作为喷流对准地球的极端活动星系核子类，由于强的多普勒集束效应，主导了河外伽玛射线天空，是宇宙中高能粒子的重要加速源。来自于高红移耀变体的伽玛射线不仅对研究早期超大质量黑洞周围的极端环境有着重要的作用，它还能够对河外背景光模型起到强有力的限制。然而由于高红移耀变体的伽玛射...
中国科学院紫金山天文台发现最遥远的GeV辐射源候选体（图）
中国科学院紫金山天文台 最遥远 GeV辐射源 候选体
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2018/10/10
高红移宇宙一直是天文学家关心的热点领域，活动星系核作为宇宙中最明亮的稳定电磁波辐射源之一，是少许研究高红移宇宙的有效探针。耀变体，作为喷流对准地球的极端活动星系核子类，由于强的多普勒集束效应，主导了河外伽玛射线天空，是宇宙中高能粒子的重要加速源。来自于高红移耀变体的伽玛射线不仅仅对研究早期超大质量黑洞周围的极端环境有着重要的作用，它还能够对河外背景光模型起到强有力的限制。然而由于高红移耀变体的伽玛...
Observations of the December 13 and 14, 2006, Solar Particle Events in the 80 MeV/n - 3 GeV/n range from space with PAMELA detector
Observations Solar Particle Events detector
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2011/10/13
We present the space spectrometer PAMELA observations of proton and helium fluxes during the December 13 and 14, 2006 solar particle events. This is the first direct measurement of the solar energetic...
MAXI GSC monitoring of the Crab nebula and pulsar during the GeV gamma-ray flare in September 2010
stars: neutron — stars: pulsars: individual (Crab) — X-rays: indi- vidual
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2011/10/12
We report on the MAXI GSC X-ray monitoring of the Crab nebula and pulsar during the GeV gamma-ray flare for the period of 2010 September 18-24 (MJD 55457-55463) detected by AGILE and Fermi-LAT. There ...
Broad Line Radio Galaxies Observed with Fermi-LAT: The Origin of the GeV Gamma-Ray Emission
Broad Line Radio Galaxies Fermi-LAT:OriginGeV Gamma-Ray Emission
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2011/10/10
We report on a detailed investigation of the gamma-ray emission from 18 broad line radio galaxies (BLRGs) based on two years of Fermi Large Area Telescope (LAT) data. We confirm the previously reporte...
Galactic sources of E>100 GeV gamma-rays seen by Fermi telescope
Gamma rays general Galaxy disk Surveys
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2010/11/9
Aims. We perform a search for sources of-rays with energies E > 100 GeV at low Galactic latitudes jbj < 10 using the data of Fermi telescope.
INTEGRAL observations of the GeV blazar PKS1502+106 and of the hard X-ray bright Seyfert Galaxy Mkn841
galaxies active – quasars individual PKS 1502+106 – Galaxies Seyfert – galaxies individual Mkn 841 – radiation
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2010/11/16
Context. Extragalactic nuclear activity is best explored with observations at high energies, where the most extreme flux and spectral variations are expected to occur, witnessing changes in the accret...
The Relation Between Charged Particles and Muons With Threshold Energy 1 GeV in Extensive Air Showers Registered at the Yakutsk EAS Array
High Energy Astrophysical Phenomena (astro-ph.HE)
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2010/12/24
Characteristics of the muon component in EAS are analyzed together with their fluctuations. The aim of this analysis -- a comparison of experimental data with computational results obtained within fra...
High energy resolution GeV gamma ray detector
High Energy Astrophysical Phenomena (astro-ph.HE)
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2010/12/24
We design a GeV gamma ray detector based on an electron-positron pair measurement by using the BESS-polar magnet and study it with the GEANT4 simulation code. We consider an additional counter to sele...
Measurement of \sigma(e e- \to pi pi-gamma) and extraction of \sigma(e e- \to pi pi-) below 1 GeV with the KLOE detector
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2007/7/28
专著信息
书名
Measurement of \sigma(e e- \to pi pi-gamma) and extraction of \sigma(e e- \to pi pi-) below 1 GeV with the KLOE detector
语种
英文
撰写或编译
作者
KLOE合作组
第一作者单位
出版社
Phys. Lett. B606 (2005) 12-24
出版地
出版日...