312 citations · 3.3k across the 117 of their papers we have counts for
8 papers · 1 filter
Hair from the Isolated Horizon Perspective
Alejandro Corichi, Daniel Sudarsky
The recently introduced Isolated Horizons (IH) formalism has become a powerful tool for realistic black hole physics. In particular, it generalizes the zeroth and first laws of bla…
Hairy Black Holes, Horizon Mass and Solitons
Abhay Ashtekar, Alejandro Corichi, Daniel Sudarsky
Properties of the horizon mass of hairy black holes are discussed with emphasis on certain subtle and initially unexpected features. A key property suggests that hairy black holes…
An alternative approach to the galactic dark matter problem
Ulises Nucamendi, Marcelo Salgado, Daniel Sudarsky
We discuss scenarios in which the galactic dark matter in spiral galaxies is described by a long range coherent field which settles in a stationary configuration that might account…
Spatial Structure and Periodicity in the Universe
Jose A. Gonzalez, Hernando Quevedo, Marcelo Salgado +1
We analyze the possibility that the spatial periodicity of 128 h^{-1}Mpc in the galaxy count number observed recently in deep pencil-beam surveys could be explained by the mere exi…
When is S=A/4?
Alejandro Corichi, Daniel Sudarsky
Black hole entropy and its relation to the horizon area are considered. More precisely, the conditions and specifications that are expected to be required for the assignment of ent…
Comment about the Letter entitled ``Scalar fields as dark matter in spiral galaxies"
Daniel Sudarsky
In this comment we point out some problems with the approach used in the paper "Scalar fields as dark matter in spiral galaxies" in the attempt to explain the flatness of the rotat…