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Dark Energy Survey reveals most accurate measurement of dark matter structure in the universe（图）
Dark Energy Survey most accurate measurement dark matter structure the universe
2017/9/4
Imagine planting a single seed and, with great precision, being able to predict the exact height of the tree that grows from it. Now imagine traveling to the future and snapping photographic proof tha...
UCLA astronomers make first accurate measurement of oxygen in distant galaxy
UCLA astronomers first accurate measurement of oxygen galaxy
2016/8/11
UCLA astronomers have made the first accurate measurement of the abundance of oxygen in a distant galaxy. Oxygen, the third-most abundant chemical element in the universe, is created inside stars and ...
Accurate Group Delay Measurement for Radial Velocity Instruments Using the Dispersed Fixed Delay Interferometer Method
Radial Velocity Dispersed Interferometer Method
2011/9/30
The Dispersed Fixed Delay Interferometer (DFDI) method is attractive for its low cost, compact size and multi-object capability in precision radial velocity (RV) measurements. The phase shift of fring...
Observations of the clustering of galaxies can provide useful information about the distribution of dark matter in the Universe. In order to extract accurate cosmological parameters from galaxy survey...
Accurate Modeling of Weak Lensing with the sGL Method
Accurate Modeling of Weak sGL Method
2010/11/10
We revise and extend the stochastic approach to cumulative weak lensing (hereafter the sGL
method) rst introduced in Ref. [1]. Here we include a realistic halo mass function and density pro les to m...
Accurate AGN black hole masses and the scatter in the M_{bh} - L_{bulge} relationship
black hole physics galaxies active galaxies bulges galaxies fundamental parameters galaxies nuclei quasars emission lines
2010/3/9
A new empirical formulae is given for estimating the masses of black holes in AGNs from the H beta velocity dispersion and the continuum luminosity at 5100 Angstroms. It is calibrated to reverberation...
Spiral Galaxies：Requirements for accurate Photometric Bulge/Disk Decomposition
Spiral Galaxies Disk Decomposition Photometric Bulge
2009/6/11
Spiral Galaxies：Requirements for accurate Photometric Bulge/Disk Decomposition。
A project to determine an accurate distance to M31 using eclipsing binaries as standard candles
accurate distance eclipsing binaries M31
2009/6/11
A project to determine an accurate distance to M31 using eclipsing binaries as standard candles。