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Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series
Triaxial modeling of halo density profiles with high-resolution N-body simulations
We present a detailed nonspherical modeling of dark matter halos on the basis of a combined analysis of high-resolution halo simulations (12 halos with N ~ 106 particles within their virial radius)…
The Luminosity and Color Dependence of the Galaxy Correlation Function
The HOD model fits nicely explain the color dependence of wp(rp) and the cross correlation between red and blue galaxies, and a conditional luminosity function (at fixed halo mass) in which central galaxies lie far above a Schechter function extrapolation of the satellite population.
Semi-analytic predictions for statistical properties of X-ray clusters of galaxies in cold dark matter universes
Temperature and luminosity functions of X-ray clusters are computed semi-analytically, combining a simple model for the cluster gas properties with the distribution functions of halo formation epochs…
The Transit Light Curve Project. V. System Parameters and Stellar Rotation Period of HD 189733
We present photometry of HD 189733 during eight transits of its close-in giant planet, and out-of-transit photometry spanning 2 yr. Using the transit photometry, we determine the stellar and…
A gravitationally lensed quasar with quadruple images separated by 14.62 arcseconds
The discovery of a lensed quasar, SDSS J1004 + 4112, which has a maximum separation between the components of 14.62 arcsec is reported, fully consistent with theoretical expectations based on the cold-dark-matter model.
Constraints on the Fluctuation Amplitude and Density Parameter from X-Ray Cluster Number Counts
We find that the observed log N-log S relation of X-ray clusters can be reproduced remarkably well with a certain range of values for the fluctuation amplitude σ8 and the cosmological density…
Strong Gravitational Lensing and Velocity Function as Tools to Probe Cosmological Parameters.
Constraints on cosmological models from strong gravitational lensing statistics are in vestigated. We pay particular attention to the role of the velocity function in the calculation of the lensing…
Measurement of the Spin-Orbit Alignment in the Exoplanetary System HD 189733
We present spectroscopy of a transit of the exoplanet HD 189733b. By modeling the Rossiter-McLaughlin effect (the anomalous Doppler shift due to the partial eclipse of the rotating stellar surface),…
Measurement of Spin-Orbit Alignment in an Extrasolar Planetary System
We determine the stellar, planetary, and orbital properties of the transiting planetary system HD 209458 through a joint analysis of high-precision radial velocities, photometry, and timing of the…