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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...
Using Star Spots to Measure the Spin-orbit Alignment of Transiting Planets
Using Star Spots Measure Alignment Transiting Planets
2011/10/8
Spectroscopic follow-up of dozens of transiting planets has revealed the degree of alignment between the equators of stars and the orbits of the planets they host. Here we determine a method, applicab...
Distance determination for RAVE stars using stellar models III: The nature of the RAVE survey and Milky Way chemistry
Stars: distances, Stars: fundamental parameters, Galaxy: abundances, Galaxy: disk, Galaxy: stellar content, Galaxy: structure
2011/9/29
We apply the method of Burnett & Binney (2010) for the determination of stellar distances and parameters to the internal catalogue of the Radial Velocity Experiment (Steinmetz et al. 2006). Subsamples...
A new RR Lyrae Survey of the Galactic Halo using QUEST Collaboration Data
Galactic Halo QUEST Collaboration Data
2009/6/26
A new RR Lyrae Survey of the Galactic Halo using QUEST Collaboration Data。
A Redetermination of the LMC Proper Motion using Four Quasar Fields
LMC Proper Motion Four Quasar Fields
2009/6/26
A Redetermination of the LMC Proper Motion using Four Quasar Fields。
Using the Seismology of Non-magnetic Chemically Peculiar Stars as a Probe of Dynamical Processes in Stellar Interiors
Variable stars diffusion
2009/5/12
Chemical composition is a good tracer of the hydrodynamical
processes that occur in stars as they often lead to mixing and particle transport.
By comparing abundances predicted by models and those o...
ON DETERMINATION OF THE COSMIC RAY FLUX USING MOLECULAR HYDROGEN ABSORPTION LINES
Molecular processes-SM molecules-quasars absorption lines
2009/3/11
We outline a procedure for estimating the cosmic ray flux at remote
locations where molecular hydrogen absorption lines have been detected. The
method relies on several assumptions whose validity in...