636 citations · 1.4k across the 37 of their papers we have counts for
33 papers
A redshift-independent theoretical halo mass function validated with Uchuu simulations
Elena Fernández-García, Juan E. Betancort-Rijo, Francisco Prada +3
We present a new theoretical framework for the halo mass function (HMF) that accurately predicts the abundance of dark matter haloes across an exceptionally wide range in mass and…
Single-photon gig in Betelgeuse's occultation
F. Prada, R. Gomez-Merchan, E. Pérez +6
We present results from the occultation of Betelgeuse by asteroid (319) Leona on December 12, 2023, observed using a 64x64 pixel Single-Photon Avalanche Diode (SPAD) array mounted…
Constraining cosmological parameters using void statistics from the SDSS survey
Elena Fernández-García, Juan E. Betancort-Rijo, Francisco Prada +2
We identify voids as maximal non-overlapping spheres within the haloes of the Uchuu simulation and three smaller halo simulation boxes with smaller volume and different val…
Exact semianalytical calculation of rotation curves with Bekenstein-Milgrom nonrelativistic MOND
M. Lopez-Corredoira, J. E. Betancort-Rijo
Astronomers use to derive MOdified Newtonian Dynamics (MOND) rotation curves using the simple algebraic rule of calculating the acceleration as equal to the Newtonian acceleration…
Biases in galaxy cluster velocity dispersion and mass estimates in the small number of galaxies regime
A. Ferragamo, J. A. Rubiño-Martín, J. Betancort-Rijo +3
We present a study of the statistical properties of three velocity dispersion and mass estimators, namely biweight, gapper and standard deviation, in the small number of galaxies r…
Biases in the estimation of velocity dispersions and dynamical masses for galaxy clusters
Antonio Ferragamo, José Alberto Rubiño-Martín, Juan Betancort-Rijo +3
Using a set of 73 numerically simulated galaxy clusters, we have characterised the statistical and physical biases for three velocity dispersion and mass estimators, namely biweigh…