搜索结果: 1-12 共查到“知识库 天文学 precision”相关记录12条 . 查询时间(0.045 秒)
Precision simulation of ground-based lensing data using observations from space
methods: data analysis – techniques: image processing – gravitational lensing: weak – galaxies: structure
2011/10/13
Current and upcoming wide-field, ground-based, broad-band imaging surveys promise to address a wide range of outstanding problems in galaxy formation and cosmology. Several such uses of ground-based d...
Accurate relative spectrophotometry is critical for many science applications. Small wavelength scale residuals in the flux calibration can significantly impact the measurements of weak emission and a...
High precision astrometry mission for the detection and characterization of nearby habitable planetary systems with the Nearby Earth Astrometric Telescope (NEAT)
Exoplanets Planetary systems Planetary formation Astrometry Space Mission
2011/10/11
A complete census of planetary systems around a volume-limited sample of solar-type stars (FGK dwarfs) in the Solar neighborhood with uniform sensitivity down to Earth-mass planets within their Habita...
Deriving the radial-velocity variations induced by stellar activity from high-precision photometry - Test on HD189733 with simultaneous MOST/SOPHIE data
late-type – stars: activity – stars: rotation – techniques: radial velocity – planetary systems – stars: individual
2011/10/19
Stellar activity induces apparent radial velocity (RV) variations in late-type main-sequence stars that may hamper the detection of low-mass planets and the measurement of their mass. We use simultane...
Assessing the Role of Spin Noise in the Precision Timing of Millisecond Pulsars
the Role of Spin Noise the Precision Timing
2011/1/10
We investigate rotational spin noise (referred to as timing noise) in non-accreting pulsars: millisecond pulsars, canonical pulsars, and magnetars. Particular attention is placed on quantifying the st...
A Precision Test for an Extra Spatial Dimension Using Black Hole--Pulsar Binaries
Extra Spatial Dimension Black Hole Pulsar Binaries
2011/1/11
We discuss the observable effects of enhanced black-hole mass loss in a black hole--neutron star (BH--NS) binary, due to the presence of a warped extra spatial dimension of curvature radius $L$ in the...
Towards Precision LSST Weak-Lensing Measurement - I: Impacts of Atmospheric Turbulence and Optical Aberration
Astronomical Instrumentation gravitational lensing dark matter cosmology
2010/11/12
The weak-lensing science of the Large Synoptic Survey Telescope (LSST)project drives the need to carefully model and separate the instrumental arti-facts from the intrinsic shear signal caused by grav...
Precision and Resolution in Stellar Spectropolarimetry
Instrumentation and Methods for Astrophysics (astro-ph.IM)
2010/12/24
Stellar spectropolarimetry is a relatively new remote sensing tool for exploring stellar atmospheres and circumstellar environments. We present the results of our HiVIS survey and a multi-wavelength E...
A signature of the dark energy equation of state may be observed in the shape of voids. We estimate the constraints on cosmological parameters that would be determined from the ellipticity distributio...
Precision timing of PSR J1012+5307 and strong-field GR tests
PSR J1012+5307 dipole radiation gravitational constant variation
2010/3/19
We report on the high precision timing analysis of the pulsar-white dwarf binary PSR J1012+5307. Using 15 years of multi-telescope data from the European Pulsar Timing Array (EPTA) network, a signific...
Precision Radial Velocities for the Kepler Era。
A brief review of inflation is presented. After having demonstrated the generality of the inflationary mechanism, the emphasis is put on its simplest realization, namely the single field slow-roll inf...