搜索结果: 1-15 共查到“天体物理学 FAST”相关记录21条 . 查询时间(0.156 秒)
中国科学院国家天文台FAST球状星团脉冲星巡天揭示球状星团脉冲星新规律（图）
演化 天体物理学 辐射
2024/11/5
球状星团聚集了大量特殊类型脉冲星，包括毫秒脉冲星、脉冲双星、双中子星等。这些脉冲星为研究脉冲星演化规律、分析特殊类型脉冲星形成和演化路径、脉冲星和周围星际介质的相互作用等提供了难得的机会。500米口径球面射电望远镜(FAST)自调试开始即开展球状星团脉冲星巡天工作，至今已发现56颗脉冲星，将FAST天区内球状星团脉冲星数量增加约两倍。
中国天眼FAST发现迄今轨道周期最短脉冲星系统（图）
中国天眼 FAST 轨道周期 脉冲星系统
2023/6/25
2023年6月21日，国际学术期刊《自然》在线发表中国天眼FAST取得的一项重要成果。该团队利用中国天眼FAST发现了一个名为PSR J1953+1844（M71E）的双星，其轨道周期仅为53分钟，是目前发现轨道周期最短的脉冲星双星系统。该发现填补了蜘蛛类脉冲星系统演化模型中缺失的一环。
基于fast数据发现黑寡妇脉冲星的离子透镜现象（图）
fast数据 黑寡妇脉冲星 离子透镜
2023/1/13
黑寡妇脉冲星是一类特殊的毫秒脉冲星，位于双星系统中，其主星辐射束直接扫过伴星，导致伴星逐渐被蒸发，因此而得名。黑寡妇脉冲星的射电辐射性质对双星的形成和演化，电磁波在强磁场等离子体中的传播性质等方面研究有重要意义。
FAST望远镜首次发现毫秒脉冲星的jitter模式（图）
FAST 望远镜 毫秒脉冲星 jitter模式
2021/3/3
利用脉冲星计时阵探测纳赫兹引力波是目前天文学领域的热点前沿，理解其中的计时噪声并且提高计时精度会极大提高探测纳赫兹引力波的能力。近日，中国科学院国家天文台博士研究生冯毅及其导师李菂研究员和来自澳大利亚联邦科学与工业研究组织的George Hobbs博士领导的团队，利用FAST发现了脉冲星计时阵中的毫秒脉冲星J1022+1001的jitter噪声(计时噪声的一种)模式，是利用FAST更好理解毫秒脉冲...
我院图形图像与模式识别实验室（IGPR）郭平教授课题组在人工智能与天文学交叉研究领域取得重要进展。在天文学领域，1967年英国天文学家Hewish和他的研究生Bell一起发现了脉冲星， 验证了物理学家30年前预言——宇宙中存在中子星。在此之后的二十多年的时间里，有关脉冲星的研究两获诺贝尔物理学奖。脉冲星为我们提供极端条件下的物理实验室。脉冲星可以作为宇宙中星际介质的探针，可以用于脉冲星计时，还可以...
Fast Radio Bursts ‘Twists And Shouts’ Help Scientists Determine Source Of Cosmic Blasts
Fast Radio Bursts Twists Shouts Scientists Cosmic Blasts
2018/1/31
An international group of astronomers has found that the Cornell University-discovered fast radio burst FRB 121102 – a brief, gigantic pulse of radio waves from 3 billion light years away – passes thr...
York University astrophysicists detect ultra-fast winds near supermassive black hole
York University astrophysicists ultra-fast winds supermassive black hole
2016/3/28
New research led by astrophysicists at York University has revealed the fastest winds ever seen at ultraviolet wavelengths near a supermassive black hole.“We’re talking wind speeds of 20 per cent the ...
A distant quasar may have its light split into multiple images by a foreground galaxy cluster that acts as a gravitational lens. The light travels along different paths of differing lengths to form ea...
Spectro-timing analysis of Cygnus X-1 during a fast state transition
X-rays: binaries, X-rays: individual: CygX-1
2011/10/19
We present the analysis of two long, quasi-uninterrupted RXTE observations of Cygnus X-1 that span several days within a 10 d interval. The spectral characteristics during this observation cover the r...
Real-time, fast radio transient searches with GPU de-dispersion
Real-time fast radio transient searches de-dispersion
2011/10/8
The identification, and subsequent discovery, of fast radio transients through blind-search surveys requires a large amount of processing power, in worst cases scaling as $\mathcal{O}(N^3)$. For this ...
Fast Timing Analysis of Cygnus X-1 using SPI on board INTEGRAL
Analysis Cygnus board INTEGRAL
2011/9/29
For the very first time, we report the high frequency analysis of Cyg X-1 up to hard X-ray using SPI on-board INTEGRAL. After analyzing the possible contribution fromthe background, and using INTEGRAL...
A fast 2D image reconstruction algorithm from 1D data for the Gaia mission
methods data analysis
2011/8/24
A fast 2-dimensional image reconstruction method is presented, which takes as input 1-dimensional data acquired from scans across a central source in different orientations. The resultant reconstructe...
XMM-Newton observations of the supergiant fast X-ray transients XTEJ1739-302, IGRJ08408-4503 and IGRJ18410-0535
XMM-Newton X-ray supergiant fast
2011/8/24
We report here on the XMM-Newton observations of the three supergiant fast X-ray transients (SFXT) XTE J1739-302, IGRJ08408-4503, and IGRJ18410-0535. For the latter source we only discuss some prelimi...
A Fast Numerical Scheme for Causal Relativistic Hydrodynamics with Dissipation
relativistic hydrodynamics relativistic dissipation relativity kinetic theory methods: numerical
2011/9/13
In this paper, we develop a stable and fast numerical scheme for relativistic dissipative hydrodynamics based on Israel-Stewart theory. Israel-Stewart theory is a stable and causal description of diss...
Orbital parameters of supergiant fast X-ray transients
X-rays binaries – Stars neutron – Stars supergiants – Accretion accretion disks
2010/11/15
Context. Super giant fast X-ray transient (SFXT) is a new class of the high mass X-ray binary that shows short X-ray flares. The physical mechanism of SFXT short flares is still open for discussion. T...