搜索结果: 1-15 共查到“天体物理学 measurements”相关记录21条 . 查询时间(0.234 秒)
Future constraints on variations of the fine structure constant from combined CMB and weak lensing measurements
Future constraints variations fine structure constant combined CMB weak lensing measurements
2012/2/21
We forecast the ability of future CMB and galaxy lensing surveys to constrain variations of the fine structure constant. We found that lensing data, as those expected from satellite experiments as Euc...
The instrumental polarization of the Nasmyth focus polarimetric differential imager NAOS/CONICA (NACO) at the VLT - Implications for time-resolved polarimetric measurements of Sgr A*
the Nasmyth focus polarimetric differential imager NAOS/CONICA (NACO)
2011/1/10
We report on the results of calibrating and simulating the instrumental polarization properties of the ESO VLT adaptive optics camera system NAOS/CONICA (NACO) in the Ks-band. We use the Stokes/Muelle...
Effects of large-scale structure on the accuracy of weak lensing mass measurements
cosmology observations dark matter large-scale structure of Uni-verse galaxies clusters
2010/11/10
Weak gravitational lensing has become an important method to determine the masses of galaxy clusters. The intrinsic shapes of the galaxies are a dominant source of uncertainty, but there are other lim...
Complementarity of Weak Lensing and Peculiar Velocity Measurements in Testing General Relativity
Complementarity of Weak Lensing Peculiar Velocity Measurements General Relativity
2010/11/12
We explore the complementarity of weak lensing and galaxy peculiar velocity measurements to
better constrain modifications to General Relativity. We find no evidence for deviations from GR on cosmolo...
Estimation of compact binary coalescense rates from short gamma-ray burst redshift measurements
compact binary coalescense rates short gamma-ray
2010/11/12
Short gamma-ray bursts are believed to originate from the merger of two compact objects. If this scenario is correct, these bursts will be accompanied by the emission of strong gravitational waves, de...
Timing Measurements of the Relativistic Binary Pulsar PSR B1913+16
binaries close gravitation gravitational waves pulsars:individual stars fundamental parameters
2010/11/10
We present results of more than three decades of timing measurements of the rst known binary pulsar, PSR B1913+16. Like most other pulsars, its rotational behavior over such long time scales is signi...
Surface convection and red giants radii measurements
Solar and Stellar Astrophysics (astro-ph.SR)
2011/1/7
The phenomenological models of convection use characteristic length scales they do not determine but that are chosen to fit solar or stellar observations. We investigate if changes of these length sca...
Understanding the faint red galaxy population using large-scale clustering measurements from SDSS DR7
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/27
We use data from the SDSS to investigate the evolution of the large-scale galaxy bias as a function of luminosity for red galaxies. We carefully consider correlation functions of galaxies selected fro...
Power Spectrum Analysis of Mount-Wilson Solar Diameter Measurements: Evidence for Solar Internal R-mode Oscillations
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/23
This article presents a power-spectrum analysis of 39,024 measurements of the solar diameter made at the Mount Wilson Observatory from 1968.670 to 1997.965. This power spectrum contains a number of ve...
CCD MEASUREMENTS OF DOUBLE AND MULTIPLE STARS AT NAO ROZHEN. IV
binaries visual the Bulgarian National Astronomical Observatory
2010/10/29
Using the 2 m telescope of the Bulgarian National Astronomical Observatory at Rozhen observations of 30 double or multiple stars were carried out during two half nights on July 20 and 21, 2009. This i...
Measurements of stellar and explosive nuclear astrophysics reactions
transfer reaction indirect measurement astrophysical s-factor reaction rate
2009/8/14
This paper described the nuclear astrophysical studies using the unstable ion beam facility GIRAFFE in CIAE, by indirect measurements. We measured the angular distributions for some single proton or ...
From speckle measurements to computation of the binary system orbits at the Astronomical Observatory R. M. Aller
binary system orbits Astronomical Observatory R. M. Aller
2009/6/26
From speckle measurements to computation of the binary system orbits at the Astronomical Observatory R. M. Aller。
Additional Atmospheric Opacity Measurements at Millimeter Wavelengths from San Pedro Mártir Sierra in Baja California
Atmospheric Opacity Measurements San Pedro Mártir Sierra
2009/6/16
Additional Atmospheric Opacity Measurements at Millimeter Wavelengths from San Pedro Mártir Sierra in Baja California。
Seeing Measurements at San Pedro Mártir Observatory using the DIMM Method
San Pedro Mártir Observatory DIMM Method
2009/6/16
Seeing Measurements at San Pedro Mártir Observatory using the DIMM Method。
Wavefront outer scale measurements at San Pedro Mártir observatory. Its impact on adaptive optics performances
Wavefront outer adaptive optics San Pedro Mártir
2009/6/11
Wavefront outer scale measurements at San Pedro Mártir observatory. Its impact on adaptive optics performances。