39 citations · 82 across the 8 of their papers we have counts for
8 papers
Constraints on dark matter models from the stellar cores observed in ultra-faint dwarf galaxies: Self-interacting dark matter
Jorge Sanchez Almeida
It has been proposed that the stellar cores observed in ultra-faint dwarf (UFD) galaxies reflect underlying dark matter (DM) cores that cannot be formed by stellar feedback acting…
Implications of the intriguing constant inner mass surface density observed in dark matter halos
Jorge Sanchez Almeida
It is known for long that the observed mass surface density of cored dark matter (DM) halos is approximately constant, independently of the galaxy mass (i.e., rhoc X rc simeq const…
Lensing Constraints on PBHs: Substellar to Intermediate Masses
E. Mediavilla, J. Jiménez-Vicente
Gravitational microlensing is a robust tool to detect and directly measure the abundance and mass of any kind of compact objects, either in our galaxy or in the extragalatic domain…
Dwarf galaxies with central cores in modified Newtonian dynamics (MOND) gravity
J. Sanchez Almeida
Some dwarf galaxies are within the Mondian regime at all radii, i.e., the gravitational acceleration provided by the observed baryons is always below the threshold of $g_†\simeq 1.…
The principle of maximum entropy and the distribution of mass in galaxies
J. Sanchez Almeida
We do not have a final answer to the question of why galaxies choose a particular internal mass distribution. Here we examine whether the distribution is set by thermodynamic equil…
Spotting the differences between active and non-active twin galaxies on kpc-scales. A pilot study
I. del Moral-Castro, B. Garcia-Lorenzo, C. Ramos Almeida +6
We present a pilot study aimed to identify large-scale galaxy properties that could play a role in activating a quiescent nucleus. To do so, we compare the properties of two isolat…
High-resolution proper motions in a sunspot penumbra
I. Marquez, J. Sanchez Almeida, J. A. Bonet
Local correlation tracking techniques are used to measure proper motions in a series of high angular resolution (~0.1 arcsec) penumbra images. If these motions trace true plasma mo…
Physical properties of the solar magnetic photosphere under the MISMA hypothesis III: sunspot at disk center
J. Sanchez Almeida
Small-scale fluctuations of magnetic field and velocity may be responsible for the Stokes asymmetries observed in all photospheric magnetic structures (the MISMA hypothesis). We su…