搜索结果: 1-11 共查到“星系与宇宙学 Spectrum”相关记录11条 . 查询时间(0.215 秒)
We analyse the flux power spectrum and its covariance using simulated Lyα forests. We find that pseudo-hydro techniques are good approximations of hydrodynamical simulations at high redshift. However,...
The galaxy angular correlation functions and power spectrum from the Two Micron All Sky Survey
general statistics
2014/12/24
We calculate the angular correlation function of galaxies in the Two Micron All Sky Survey. We minimize the possible contamination by stars, dust, seeing, and sky brightness by studying their cross co...
Features in the primordial spectrum: new constraints from WMAP7+ACT data and prospects for Planck
Features primordial spectrum constraints WMAP7+ACT data prospects Planck
2011/10/19
We update the constraints on possible features in the primordial inflationary density perturbation spectrum by using the latest data from the WMAP7 and ACT Cosmic Microwave Background experiments. The...
The Turbulence Spectrum of Molecular Clouds in the Galactic Ring Survey: A Density-Dependent PCA Calibration
Turbulence Spectrum Molecular Clouds Galactic Ring Survey
2011/10/13
Turbulence plays a major role in the formation and evolution of molecular clouds. The problem is that turbulent velocities are convolved with the density of an observed region. To correct for this con...
Nuclear de-excitation line spectrum of Cassiopeia A
Astroparticle physics – cosmic rays – ISM: supernova remnants
2011/10/13
The supernova remnant Cassiopeia A is a prime candidate for accelerating cosmic ray protons and ions. Gamma rays have been observed at GeV and TeV energies, which indicates hadronic interactions, but ...
The Non-Linear Matter Power Spectrum in Warm Dark Matter Cosmologies
Cosmology: theory – large-scale structure of the Universe – dark matter,methods: numerical – gravitational lensing: weak
2011/10/12
We investigate the non-linear evolution of the matter power spectrum by using a large set of high-resolution N-body/hydrodynamic simulations. The linear matter power in the initial conditions is consi...
Dual-Frequency Observations of 140 Compact, Flat-Spectrum Active Galactic Nuclei for Scintillation-Induced Variability
Flat-Spectrum Active Galactic Nuclei Variability
2011/10/8
The 4.9 GHz Micro-Arcsecond Scintillation-Induced Variability (MASIV) Survey detected a drop in Interstellar Scintillation (ISS) for sources at redshifts z > 2, indicating an apparent increase in angu...
Night to night variability of the emission lines in the nuclear spectrum of the Seyfert Galaxy NGC 3227
emission lines Galaxy nuclear spectrum
2009/7/9
Night to night variability of the emission lines in the nuclear spectrum of the Seyfert Galaxy NGC 3227。
The coronal line spectrum of the brightest seyfert galaxies as seen by iso
coronal line spectrum seyfert galaxies iso
2009/6/5
The coronal line spectrum of the brightest seyfert galaxies as seen by iso。
Large Scale Magnetic Fields：Density Power Spectrum in Redshift Space
Cosmology magnetic fields MHD
2009/5/19
We compute the density redshift-space power spectrum in
the presence of tangled magnetic fields and compare it with existing observations.
Our analysis shows that if these magnetic fields originated...
Full-spectrum study of small patch of sky yields portrait of maturing universe（图）
galaxies
2007/3/12
6 March 2007，BERKELEY – A massive project to generate an all-color map of the galaxies in a small area of sky, utilizing four satellite telescopes and four ground-based telescopes, is yielding new inf...