搜索结果: 1-14 共查到“天文学 velocities”相关记录14条 . 查询时间(0.046 秒)
The HARPS search for southern extra-solar planets. XXXI. Magnetic activity cycles in solar-type stars: statistics and impact on precise radial velocities
Planetary systems – Stars: activity – Stars: chromospheres – Line: profi les – Techniques: radial velocities – Techniques:spectroscopic
2011/10/17
Context. Searching for extrasolar planets through radial velocity measurements relies on the stability of stellar photospheres. Aims. We aim at characterizing the statistical properties of magnetic ac...
Pairwise Velocities of Dark Matter Halos: a Test for the Lambda Cold Dark Matter Model using the Bullet Cluster
method : N-body simulations — galaxies : evolution — galaxies : for-mation — galaxies: clusters — cosmology : theory — cosmology : dark matter
2011/10/13
The existence of a bullet cluster (such as 1E0657-56) poses a challenge to the concordance Lambda cold dark matter model. Here we investigate the velocity distribution of dark matter halo pairs in lar...
Warm dark matter at small scales: peculiar velocities and phase space density
Warm dark matter small scales peculiar velocities phase space density
2010/11/12
We study the scale and redshift dependence of the power spectra for density perturbations and
peculiar velocities, and the evolution of a coarse grained phase space density for (WDM) particles that d...
Modeling maximum astrophysical gravitational recoil velocities
maximum astrophysical gravitational recoil velocities
2010/11/16
We measure the recoil velocity as a function of spin for equal-mass, highly-spinning black-hole
binaries, with spins in the orbital plane, equal in magnitude and opposite in direction. We con rm that...
Ejection velocities of high Galactic latitude runaway stars
Solar and Stellar Astrophysics (astro-ph.SR)
2011/1/7
We estimate the distribution of ejection velocities for the known population of high galactic latitude runaway stars. The initial sample is a collection of 174 early-type stars selected from the liter...
WIYN Open Cluster Study. XXXVIII. Stellar Radial Velocities in the Young Open Cluster M35 (NGC 2168)
open clusters and associations individual (NGC 2168) - (stars:) binaries spectroscopic
2010/3/8
We present 5201 radial-velocity measurements of 1144 stars, as part of an ongoing study of the young (150 Myr) open cluster M35 (NGC 2168). We have observed M35 since 1997, using the Hydra Multi-Objec...
Precision Radial Velocities for the Kepler Era。
Uniformity Despite Diversity：PN Expansion Velocities in the Local Group
PN Expansion Velocities Local Group
2009/7/1
Uniformity Despite Diversity：PN Expansion Velocities in the Local Group。
Expansion Velocities of Planetary Nebulae with [WC] Central Stars
Planetary Nebulae Central Stars
2009/6/15
Expansion Velocities of Planetary Nebulae with [WC] Central Stars。
Expansion velocities from different ions of planetary nebulae with [wc]-type central stars
different ions planetary nebulae [wc]-type central stars
2009/6/11
Expansion velocities from different ions of planetary nebulae with [wc]-type central stars。
Modeling the radial velocities and proper motions of herbig-haro objects
radial velocities herbig-haro objects proper motions
2009/6/10
Modeling the radial velocities and proper motions of herbig-haro objects。
Radial velocities, binarity, and kinematic membership in open clusters with blue straggler candidates
Radial velocities binarity kinematic membership open clusters
2009/6/10
Radial velocities, binarity, and kinematic membership in open clusters with blue straggler candidates。
On the Stability of a Self-Gravitating Inhomogeneous Fluid in the Form of Two Confocal Spheroids Rotating with Different Angular Velocities
Self-Gravitating Inhomogeneous Fluid Angular Velocities Confocal Spheroids Rotating
2009/6/4
On the Stability of a Self-Gravitating Inhomogeneous Fluid in the Form of Two Confocal Spheroids Rotating with Different Angular Velocities。
GALACTIC SUBSYSTEMS ON THE BASIS OF CUMULATIVE DISTRIBUTION OF SPACE VELOCITIES
Galaxy kinematics and dynamics-structure-solar neighbourhood
2009/1/15
A sample containing 4 614 stars with available space velocities and
high-quality kinematical data from the Arihip Catalogue is formed. For the purpose
of distinguishing galactic subsystems the cumul...