搜索结果: 1-8 共查到“天体测量学 Radio”相关记录8条 . 查询时间(0.092 秒)
Compact continuum source-finding for next generation radio surveys
image processing catalogues surveys continuum
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2012/2/24
We present a detailed analysis of four of the most widely used radio source finding packages in radio astronomy, and a program being developed for the Australian Square Kilometer Array Pathfinder (ASK...
Accelerating Radio Astronomy Cross-Correlation with Graphics Processing Units
Radio astronomy Graphics Processing Unit Signal Processing Correlation
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2011/10/13
We present a highly parallel implementation of the cross-correlation of time-series data using graphics processing units (GPUs), which is scalable to hundreds of independent inputs and suitable for th...
Chemical properties in the most distant radio galaxy
galaxies: active – galaxies: nuclei – quasars: emission lines – quasars: general
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2011/10/21
We present a deep optical spectrum of TN J0924-2201, the most distant radio galaxy at z = 5.19, obtained with FOCAS on the Subaru Telescope. We successfully detect, for the first time, the CIV1549 emi...
A multiple-beam CLEAN for imaging intra-day variable radio sources
Methods: data analysis – Techniques: image processing – Radio continuum: general
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2011/10/13
The CLEAN algorithm, widely used in radio interferometry for the deconvolution of radio images, performs well only if the raw radio image (dirty image) is, to good approximation, a simple convolution ...
Testing the WMAP cosmology via Planck radio catalogues
methods: analytical - galaxies: general - cosmic microwave background- cosmology large-scale structure of Universe
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2011/10/9
The prime evidence underpinning the standard LCDM cosmological model is the CMB power spectrum as observed by WMAP and other microwave experiments. But Sawangwit and Shanks have recently shown that th...
Encoding many channels in the same frequency through radio vorticity: first experimental test
Encoding many channels frequency through radio vorticity experimental test
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2011/10/18
We have shown experimentally that it is possible to propagate and use the properties of twisted non-monochromatic incoherent radio waves to simultaneously transmit to infinity more radio channels on t...
Deep vlt spectroscopy of high redshift radio galaxy MRC 2104{242：evidence for a metallicity gradient
Deep vlt spectroscopy high redshift radio galaxy metallicity gradient
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2009/6/10
Deep vlt spectroscopy of high redshift radio galaxy MRC 2104{242：evidence for a metallicity gradient。
OPTICAL SPECTRA OF RADIO PLANETARY NEBULAE IN THE SMALL MAGELLANIC CLOUD
planetary nebulae individual N9, SMP11, N61, N68
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2009/2/9
We present preliminary results from spectral observations of four
(4) candidate radio sources co-identi¯ed with known planetary nebulae (PNe) in the
Small Magellanic Cloud (SMC). These were mad...