61 citations · 299 across the 14 of their papers we have counts for
15 papers
Magnetic fields from cosmological bulk flows
J. A. R. Cembranos, A. L. Maroto, H. Villarrubia-Rojo
We explore the possibility that matter bulk flows could generate the required vorticity in the electron-proton-photon plasma to source cosmic magnetic fields through the Harrison m…
Neutrino fluxes from Dark Matter in the HESS J1745-290 source at the Galactic Center
J. A. R. Cembranos, V. Gammaldi, A. L. Maroto
The spectral study of the HESS J1745-290 high energy gamma-ray cut-off from the galactic center is compatible with a signal of Dark Matter (DM) annihilation or decay. If this is th…
Gamma-ray and neutrino fluxes from Heavy Dark Matter in the Galactic Center
V. Gammaldi, J. A. R. Cembranos, A. de la Cruz-Dombriz +2
We present a study of the Galactic Center region as a possible source of both secondary gamma-ray and neutrino fluxes from annihilating dark matter. We have studied the gamma-ray f…
Vacuum energy as dark matter
F. D. Albareti, J. A. R. Cembranos, A. L. Maroto
We consider the vacuum energy of massive quantum fields in an expanding universe. We define a conserved renormalized energy-momentum tensor by means of a comoving cutoff regulariza…
Solution to the Isotropy Problem for Cosmological Hidden Vector Models
J. A. R. Cembranos, A. L. Maroto, S. J. Nunez Jareno
Gauge bosons associated to new gauge symmetries under which the standard model particles are not charged are predicted in many extensions of the standard model of particles and int…
Complete density perturbations in the Jordan-Fierz-Brans-Dicke theory
J. A. R. Cembranos, A. de la Cruz Dombriz, L. Olano Garcia
In the context of scalar-tensor theories we study the evolution of the density contrast for Jordan-Fierz-Brans-Dicke theories in a Friedmann-Lemaitre-Robertson-Walker Universe. Cal…
Spectral Study of the HESS J1745-290 Gamma-Ray Source as Dark Matter Signal
J. A. R. Cembranos, V. Gammaldi, A. L. Maroto
We study the main spectral features of the gamma-ray fluxes observed by the High Energy Stereoscopic System (HESS) from the J1745-290 Galactic Center source during the years 2004,…
Isotropy theorem for cosmological Yang-Mills theories
J. A. R. Cembranos, A. L. Maroto, S. J. Núñez Jareño
We consider homogeneous non-abelian vector fields with general potential terms in an expanding universe. We find a mechanical analogy with a system of N interacting particles (with…
Dark matter origin of the gamma ray emission from the galactic center observed by HESS
J. A. R. Cembranos, V. Gammaldi, A. L. Maroto
We show that the gamma ray spectrum observed with the HESS array of Cherenkov telescopes coming from the Galactic Center (GC) region and identified with the source HESS J1745-290,…
Indirect constraints to branon dark matter
J. A. R. Cembranos, A. de la Cruz-Dombriz, V. Gammaldi +1
If the present dark matter in the Universe annihilates into Standard Model particles, it must contribute to the gamma ray fluxes detected on the Earth. Here we briefly review the p…
Modified spinning black holes
J. A. R. Cembranos, A. de la Cruz-Dombriz, P. Jimeno Romero
In the context of f(R) modified gravity theories we determine that the black holes existence is determined by the sign of a parameter dependent of the mass, the charge, the spin an…
Detection of branon dark matter with gamma ray telescopes
J. A. R. Cembranos, A. de la Cruz-Dombriz, V. Gammaldi +1
Branons are new degrees of freedom that appear in flexible brane-world models corresponding to brane fluctuations. These new fields can behave as standard weakly interacting massiv…
Kerr-Newman black holes in f(R) theories
J. A. R. Cembranos, A. de la Cruz-Dombriz, P. Jimeno Romero
In the context of f(R) modified gravity theories, we study the Kerr-Newman black-hole solutions. We study non-zero constant scalar curvature solutions and discuss the metric tensor…
Branons as dark matter
J. A. R. Cembranos, A. Dobado, A. L. Maroto
In the brane-world scenario with low tension, brane fluctuations (branons) together with the Standard Model particles are the only relevant degrees of freedom at low energies. Bran…
Brane-skyrmions and wrapped states
J. A. R. Cembranos, A. Dobado, A. L. Maroto
In the context of a brane world and including an induced curvature term in the brane action, we obtain the effective lagrangian for the Goldstone bosons (branons) associated with t…