搜索结果: 1-11 共查到“国际动态 γ射线天文学”相关记录11条 . 查询时间(2.375 秒)
据英国《自然·天文学》杂志29日发表的一项最新发现，天文学家团队在数千个γ射线暴中寻找“引力透镜”，最终利用宇宙早期的一次爆发所产生的光畸变揭示了一个中等质量黑洞（IMBH）存在。该结果将为理解黑洞的形成以及小质量黑洞如何成为超大质量黑洞带来关键性启示。众所周知，黑洞无法直接观测，但科学家可以通过间接方式得知其存在与质量，并且观测到它对其他事物的影响。利用天体被吸入之前、因黑洞引力带来的加速度摩擦...
Fermi Telescope Caps its First Year with a Glimpse of Space-Time
Fermi Telescope First Year Space-Time
2009/11/4
During its first year of operations, NASA's Fermi Gamma Ray Space Telescope mapped the extreme sky with unprecedented resolution and sensitivity. It captured more than one thousand discrete sources of...
Special relativity passes key test（图）
special relativity quantum gravity distant gamma-ray
2009/11/4
Scientists studying radiation from a distant gamma-ray burst have found that the speed of light does not vary with wavelength down to distance scales below that of the Planck length. They say that thi...
欧洲航天局卫星观测到微弱的伽马射线爆
伽马射线爆
2008/10/15
欧洲航天局2008年10月13日宣布，该机构的伽马射线观测卫星日前观测到了几次微弱的伽马射线爆。此前科学界一直认为，伽马射线爆释放的能量十分强大，这一发现可能会颠覆科学界的传统看法。
科学家首次测定伽马射线暴爆发速度（图）
伽马射线暴 天文学
2007/6/14
科学网2007年6月14日消息 利用欧洲南方天文台La Silla观测站（ESO La Silla Observatory）的REM自动天文望远镜，科学家首次测定了伽马射线暴（Gamma Ray Burst，简称GRB）的爆发速度。他们发现，剧烈爆发的物质的运动速度可以超过光速的99.999%，几乎可以说是宇宙中速度的极限。
领导该项研究的Emilio Molinari表示，“随着快速定向地面望...
Iowa State astrophysicists provide the eyes for new gamma ray telescope system（图）
gamma ray telescope system
2007/4/20
19-Apr-2007，AMES, Iowa -- There’s a "First Light Fiesta" in the works at Mt. Hopkins near Amado, Ariz. And Iowa State University astrophysicists will be among those enjoying the celebration of a new t...
11-Apr-2007，NASA’s next major space observatory, the Gamma-ray Large Area Space Telescope (GLAST), is one step closer to unveiling the mysteries of the high-energy universe. Almost all the components ...
8 March 2007—Several times a week, astronomers detect the violent death cry of a massive star -- an extraordinarily energetic release of gamma rays that takes place in just a matter of seconds to minu...
European astronomers create largest-ever catalogue of gamma-ray sources in the universe（图）
gamma-ray
2007/3/15
23 February 2007，Using data from the European Space Agency's latest orbiting gamma-ray observatory, Integral, a European team of astronomers led by Dr Antony Bird of the University of Southampton (UK)...
8 March 2007，HESS is a system of four gamma-ray telescopes designed to probe extreme cosmic events and put constraints on the nature of "dark matter". In 2005, HESS detected eight new high-energy gamm...