924 citations · 4.5k across the 99 of their papers we have counts for
44 papers · 1 filter
A new test of gravity -- I: Introduction to the method
Joaquin Armijo, Carlton M. Baugh, Peder Norberg +1
We introduce a new scheme based on the marked correlation function to probe gravity using the large-scale structure of the Universe. We illustrate our approach by applying it to si…
Guess the cheese flavour by the size of its holes: A cosmological test using the abundance of Popcorn voids
Dante J. Paz, Carlos M. Correa, Sebastián R. Gualpa +4
We present a new definition of cosmic void and a publicly available code with the algorithm that implements it. Underdense regions are defined as free-form objects, called popcorn…
Extended primordial black hole mass functions with a spike
Juan Magaña, Marco San Martín, Joaquín Sureda +3
We introduce a modification of the Press-Schechter formalism aimed to derive general mass functions for primordial black holes (PBHs). In this case, we start from primordial power…
Dark matter from primordial black holes would hold charge
Ignacio J. Araya, Nelson D. Padilla, Marcelo E. Rubio +3
We explore the possibility that primordial black holes (PBHs) contain electric charge down to the present day. We find that PBHs should hold a non-zero net charge at their formatio…
Making use of sub-resolution halos in N-body simulations
Joaquin Armijo, Carlton M. Baugh, Nelson D. Padilla +2
Conservative mass limits are often imposed on the dark matter halo catalogues extracted from N-body simulations. By comparing simulations with different mass resolutions, at …
Evolution mapping: a new approach to describe matter clustering in the non-linear regime
Ariel G. Sanchez, Andrés N. Ruiz, Jenny Gonzalez Jara +1
We present a new approach to describe statistics of the non-linear matter density field that exploits a degeneracy in the impact of different cosmological parameters on the linear…
Redshift-space effects in voids and their impact on cosmological tests. Part II: the void-galaxy cross-correlation function
Carlos M. Correa, Dante J. Paz, Nelson D. Padilla +3
This is the second part of a thorough investigation of the redshift-space effects that affect void properties and the impact they have on cosmological tests. Here, we focus on the…
Simultaneous Estimation of Large-Scale Structure and Milky Way Dust Extinction from Galaxy Surveys
Matías Bravo, Eric Gawiser, Nelson D. Padilla +3
The high cosmological precision offered by the next generation of galaxy surveys hinges on improved corrections for Galactic dust extinction. We explore the possibility of estimati…
Gravitational redshifting of galaxies in the SPIDERS cluster catalogue
C. T. Mpetha, C. A. Collins, N. Clerc +10
Data from the SPectroscopic IDentification of ERosita Sources (SPIDERS) are searched for a detection of the gravitational redshifting of light from galaxies in $\si…
SPIDERS: An Overview of The Largest Catalogue of Spectroscopically Confirmed X-ray Galaxy Clusters
C. C. Kirkpatrick, N. Clerc, A. Finoguenov +16
SPIDERS is the spectroscopic follow-up effort of the Sloan Digital Sky Survey IV (SDSS-IV) project for the identification of X-ray selected galaxy clusters. We present our catalogu…
Magnetic field generation from primordial black hole distributions
Ignacio J. Araya, Marcelo E. Rubio, Marco San Martin +4
We introduce a statistical method for estimating magnetic field fluctuations generated from primordial black hole (PBH) populations. To that end, we consider monochromatic and exte…
Clustering of CODEX clusters
Valtteri Lindholm, Alexis Finoguenov, Johan Comparat +7
Aims. We analyze the autocorrelation function of a large contiguous sample of galaxy clusters, the Constrain Dark Energy with X-ray (CODEX) sample, in which we take particular care…
Power spectrum of density fluctuations, halo abundances and clustering with primordial black holes
Nelson Padilla, Juan Magana, Joaquin Sureda +1
We study the effect of dark matter (DM) being encapsulated in primordial black holes (PBHs) on the power spectrum of density fluctuations ; we also look at its effect on the…
Press-Schechter primordial black hole mass functions and their observational constraints
Joaquin Sureda, Juan Magana, Ignacio J. Araya +1
We present a modification of the Press-Schechter (PS) formalism to derive general mass functions for primordial black holes (PBHs), considering their formation as being associated…
Redshift-space effects in voids and their impact on cosmological tests. Part I: the void size function
Carlos M. Correa, Dante J. Paz, Ariel G. Sánchez +3
Voids are promising cosmological probes. Nevertheless, every cosmological test based on voids must necessarily employ methods to identify them in redshift space. Therefore, redshif…
A Halo Merger Tree Generation and Evaluation Framework
Sandra Robles, Jonathan S. Gómez, Adín Ramírez Rivera +3
Semi-analytic models are best suited to compare galaxy formation and evolution theories with observations. These models rely heavily on halo merger trees, and their realistic featu…
Non-fiducial cosmological test from geometrical and dynamical distortions around voids
Carlos M. Correa, Dante J. Paz, Nelson D. Padilla +3
We present a new cosmological test using the distribution of galaxies around cosmic voids without assuming a fiducial cosmology. The test is based on a physical model for the void-…
The Effect of Assembly Bias on Redshift Space Distortions
Nelson Padilla, Sergio Contreras, Idit Zehavi +2
We study potential systematic effects of assembly bias on cosmological parameter constraints from redshift space distortion measurements. We use a semi-analytic galaxy formation mo…
Testing modified gravity using a marked correlation function
Joaquin Armijo, Yan-Chuan Cai, Nelson Padilla +2
In theories of modified gravity with the chameleon screening mechanism, the strength of the fifth force depends on environment. This induces an environment dependence of structure…
Testing LSST Dither Strategies for Survey Uniformity and Large-Scale Structure Systematics
Humna Awan, Eric Gawiser, Peter Kurczynski +7
The Large Synoptic Survey Telescope (LSST) will survey the southern sky from 2022--2032 with unprecedented detail. Since the observing strategy can lead to artifacts in the data, w…
Subhalo accretion through filaments
Roberto E. Gonzalez, Nelson D. Padilla
We track subhalo orbits of galaxy and group sized halos in cosmological simulations. We identify filamentary structures around halos and we use these to define a sample of subhalos…
Void Dynamics
Nelson Padilla, Dante Paz, Marcelo Lares +4
Cosmic voids are becoming key players in testing the physics of our Universe. Here we concentrate on the abundances and the dynamics of voids as these are among the best candidates…
Clustering tomography: measuring cosmological distances through angular clustering in thin redshift shells
Salvador Salazar-Albornoz, Ariel G. Sánchez, Nelson D. Padilla +1
We test the cosmological implications of studying galaxy clustering using a tomographic approach, by computing the galaxy two-point angular correlation function in thin reds…
Chemo-Archaeological Downsizing in a Hierarchical Universe: Impact of a Top Heavy IGIMF
I. D. Gargiulo, S. A. Cora, N. D. Padilla +6
We make use of a semi-analytical model of galaxy formation to investigate the origin of the observed correlation between [a/Fe] abundance ratios and stellar mass in elliptical gala…