搜索结果: 1-13 共查到“知识库 射电天体测量学”相关记录13条 . 查询时间(2.941 秒)
南山26米射电望远镜助力探究大熊座“闪电”FRB精确位置（图）
大熊座“闪电” FRB精确位置 射电望远镜
2023/1/13
近期，《自然》和《自然·天文》同步发表2篇文章，报告了国际天文学家团队使用甚长基线干涉测量（VLBI）方法观测研究大熊座快速射电暴（FRB）的结果。中国科学院新疆天文台南山26米射电望远镜作为欧洲VLBI网成员,全程参加此项目观测，贡献了大量观测时间，助力揭示FRB起源。
基于相关测量MUSER馈源轴比的方法研究
综合孔径 明安图射电频谱日像仪 圆极化 轴比
2016/12/26
明安图射电频谱日像仪是新一代太阳专用射电成像望远镜，超宽带双圆极化接收馈源是其关键技术之一.轴比是反映双圆极化馈源性能的重要指标，单天线测量轴比的传统方法需要标准天线辅助，本文采用基于相关测量干涉阵馈源轴比的方法，针对MUSER天线数目多，且为户外环境，根据天文观测的需求须经常测试天线的性能的特点，简化了干涉阵望远镜测量轴比的过程，且能够高效的得到准确的测量结果.文中对该方法的测量过程做了详细的说...
Understanding strong molecular hydrogen emission in astronomical environments
Understanding strong molecular hydrogen emission astronomical environments
2011/10/13
Here I describe recent studies of objects with molecular hydrogen emission that is strong relative to other spectral lines. Large telescopes and fast spectrometers have made the 2 {\mu}m window access...
CANGAROO-III observation of TeV gamma rays from the unidentified gamma-ray source HESS J1614-518
CANGAROO-III observation unidentified gamma-ray source HESS J1614-518
2011/10/12
We report the detection, with the CANGAROO-III imaging atmospheric Cherenkov telescope array, of a very high energy gamma-ray signal from the unidentified gamma-ray source HESS J1614-518, which was di...
The Infrared Spectrum of Uranium Hollow Cathode Lamps from 850 nm to 4000 nm: Wavenumbers and Line Identifications from Fourier Transform Spectra
Infrared Spectrum Wavenumbers Line Identifications Transform Spectra
2011/10/12
We provide new measurements of wavenumbers and line identifications of 10 100 UI and UII near-infrared (NIR) emission lines between 2500 cm-1 and 12 000 cm-1 (4000 nm to 850 nm) using archival FTS spe...
A Model Independent Method to Study Dark Matter induced Leptons and Gamma rays
A Model Independent Method to Study Dark Matter induced Leptons and Gamma rays
2011/10/17
We propose a novel method to directly determine dark matter induced electron/positron spectrum at the source from experimental measurements at the earth, without reference to specific particle physics...
We present a one-port calibration technique for characterization of beam waveguide components with a vector network analyzer. This technique involves using a set of known delays to separate the respon...
The origin of RXJ1856.5-3754 and RXJ0720.4-3125 -- updated using new parallax measurements
stars: kinematics – pulsars: individual: RXJ1856.5-3754 – pulsars: individual
2011/9/29
RXJ1856 and RXJ0720 are the only young isolated radio-quiet neutron stars (NSs) for which trigonometric parallaxes were measured. Due to detection of their thermal emission in X-rays they are importan...
Astronomical Observations of Galactic Radiosources with ESCORT：an small radiotelescope
Astronomical Observations radiotelescope Galactic Radiosources
2009/6/30
Astronomical Observations of Galactic Radiosources with ESCORT：an small radiotelescope。
The dust in molecular clouds reliably traces the molecular gas
within. We used this assumption to get an estimate of the dense cores size and
mass in L1217/L1219 by deriving the total optical extinc...