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35 papers · 2 filters
Theoretical systematics in testing the Cosmological Principle with the kinematic quasar dipole
Caroline Guandalin, Jade Piat, Chris Clarkson +1
The Cosmological Principle is part of the foundation that underpins the standard model of the Universe. In the era of precision cosmology, when stress tests of the standard model a…
COVMOS: a new Monte Carlo approach for galaxy clustering analysis
Philippe Baratta, Julien Bel, Sylvain Gouyou Beauchamps +1
We validate the COVMOS method introduced in Baratta et al. (2019) allowing for the fast simulation of catalogues of different cosmological field tracers (e.g. dark matter particles…
Cosmic void exclusion models and their impact on the distance scale measurements from large scale structure
Andrei Variu, Cheng Zhao, Daniel Forero-Sánchez +5
Baryonic Acoustic Oscillations (BAOs) studies based on the clustering of voids and matter tracers provide important constraints on cosmological parameters related to the expansion…
An unbiased method of measuring the ratio of two data sets
Zeyang Sun, Pengjie Zhang, Fuyu Dong +5
In certain cases of astronomical data analysis, the meaningful physical quantity to extract is the ratio between two data sets. Examples include the lensing ratio, the interlop…
BICEP / Keck XVII: Line of Sight Distortion Analysis: Estimates of Gravitational Lensing, Anisotropic Cosmic Birefringence, Patchy Reionization, and Systematic Errors
Keck Collaboration, P. A. R. Ade, Z. Ahmed +91
We present estimates of line-of-sight distortion fields derived from the 95 GHz and 150 GHz data taken by BICEP2, BICEP3, and Keck Array up to the 2018 observing season, leading to…
The cross-correlation of galaxies in absorption with the Lyman forest
Ignasi Pérez-Ràfols, Matthew M. Pieri, Michael Blomqvist +3
We present the first clustering measurement of Strong Blended Lyman (SBLA) absorption systems by measuring their cross-correlation with the Lyman forest. SBLAs are a new po…