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138 papers · 2 filters
SDSS-III Baryon Oscillation Spectroscopic Survey: Analysis of Potential Systematics in Fitting of Baryon Acoustic Feature
Mariana Vargas Magaña, Shirley Ho, Xiaoying Xu +12
Extraction of the Baryon Acoustic Oscillations (BAO) to percent level accuracy is challenging and demands an understanding of many potential systematic to an accuracy well below 1…
Planck intermediate results. XVI. Profile likelihoods for cosmological parameters
Planck Collaboration, P. A. R. Ade, N. Aghanim +180
We explore the 2013 Planck likelihood function with a high-precision multi-dimensional minimizer (Minuit). This allows a refinement of the Lambda-cdm best-fit solution with respect…
More than just halo mass: Modelling how the red galaxy fraction depends on multiscale density in a HOD framework
Stefanie Phleps, David J. Wilman, Stefano Zibetti +1
The fraction of galaxies with red colours depends sensitively on environment, and on the way in which environment is measured. To distinguish competing theories for the quenching o…
The Mass-Concentration-Redshift Relation of Cold Dark Matter Halos
Aaron D. Ludlow, Julio F. Navarro, Raul E. Angulo +4
We use the Millennium Simulation series to investigate the mass and redshift dependence of the concentration of equilibrium cold dark matter (CDM) halos. We extend earlier work on…
A volume-limited sample of X-ray galaxy groups and clusters - I. Radial entropy and cooling time profiles
Electra Panagoulia, Andy Fabian, Jeremy Sanders
We present the first results of our study of a sample of 101 X-ray galaxy groups and clusters, which is volume-limited in each of three X-ray luminosity bins. The aim of this work…
The Mutual Interaction Between Population III Stars and Self-Annihilating Dark Matter
Athena Stacy, Andreas H. Pawlik, Volker Bromm +1
We use cosmological simulations of high-redshift minihalos to investigate the effect of dark matter annihilation (DMA) on the collapse of primordial gas. We numerically investigate…