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29 papers · 2 filters
H/HD molecular data for analysis of quasar spectra in search of varying constants
W. Ubachs, E. J. Salumbides, M. T. Murphy +2
Absorption lines of H and HD molecules observed at high redshift in the line of sight towards quasars are a test ground to search for variation of the proton-to-electron mass r…
Cosmic distance inference from purely geometric BAO methods: Linear Point standard ruler and Correlation Function Model Fitting
Stefano Anselmi, Pier-Stefano Corasaniti, Ariel G. Sanchez +3
Leveraging the Baryon Acoustic Oscillations (BAO) feature present in clustering 2-point statistics, we aim to measure cosmological distances independently of the underlying backgro…
Working towards an optimal sampling of the 21 cm signal parameter space
Evan Eames, Aristide Doussot, Benoît Semelin
With a statistical detection of the 21 cm signal fluctuations from the Epoch of Reionization (EoR) expected in the next few years, there is an interest in developing robust and pre…
Special Relativistic Magnetohydrodynamics with Gravitation
Hyerim Noh, Jai-chan Hwang, Martin Bucher
We present a fully nonlinear and exact perturbation formulation of Einstein's gravity with a general fluid and the ideal magnetohydrodynamics (MHD) without imposing the slicing (te…
The environmental dependence of the baryon acoustic peak in the Baryon Oscillation Spectroscopic Survey CMASS sample
Chris Blake, Ixandra Achitouv, Angela Burden +1
The environmental dependence of galaxy clustering encodes information about the physical processes governing the growth of cosmic structure. We analyze the baryon acoustic peak as…
The scale of cosmic homogeneity as a standard ruler
Pierros Ntelis, Anne Ealet, Stephanie Escoffier +5
In this paper, we study the characteristic scale of transition to cosmic homogeneity of the universe, , as a standard ruler, to constrain cosmological parameters on…