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Gammaldi, Viviana ; Ávila-Reese, V. ; Valenzuela, O. ; González-Morales, A.X. | Amer Physical Soc | 2016-12-22We analyze the possibility that the HESS ?-ray source at the Galactic center could be explained as the secondary flux produced by annihilation of TeV dark matter (DM) particles with locally enhanced density, in a region spatially compatible with[...]texto impreso
The center of our Galaxy is a complex region characterized by extreme phenomena. The presence of the supermassive Sagittarius A* black hole, a high dark matter density and an even higher baryonic density are able to produce very energetic proces[...]texto impreso
López Maroto, Antonio ; Ruiz Cembranos, José Alberto ; Cruz Dombriz, Álvaro de la ; Gammaldi, Viviana | American Physical Society | 2012-02-07Branons 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 massive particles (WIMPs) with a significant associated thermal relic d[...]texto impreso
Gammaldi, Viviana ; Ruiz Cembranos, José Alberto ; Cruz Dombriz, Álvaro de la ; Lineros, Roberto A. ; López Maroto, Antonio | Elsevier | 2015We 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 flux observed by the High Energy Stereoscopic System (HESS) from t[...]texto impreso
Gammaldi, Viviana ; Ruiz Cembranos, José Alberto ; Cruz Dombriz, Álvaro de la ; Lineros, R.A. ; López Maroto, Antonio | Elsevier | 2015We 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 flux observed by the High Energy Stereoscopic System (HESS) from t[...]texto impreso
We analyze the possibility that the HESS ?-ray source at the Galactic center could be explained as the secondary flux produced by annihilation of TeV dark matter (DM) particles with locally enhanced density, in a region spatially compatible with[...]texto impreso
López Maroto, Antonio ; Ruiz Cembranos, José Alberto ; Cruz Dombriz, Álvaro de la ; Gammaldi, Viviana | Amer Inst Physics | 2012If 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 present constraints for the detection of gamma ray photons produce[...]texto impreso
El problema de la existencia de la materia oscura (DM) es una cuesti on de gran importancia para la f sica del siglo XXI. El Modelo Cosmol ogico Est andar proporciona una buena descripci on de la evoluci on del Universo, de acuerdo con los dato[...]texto impreso
Ruiz Cembranos, José Alberto ; Gammaldi, Viviana ; López Maroto, Antonio | American Physical Society | 2014-08-07The spectral study of the HESS J1745-290 high-energy gamma-ray cutoff from the Galactic center is compatible with a signal of dark matter (DM) annihilation or decay. If this is the case, a neutrino flux from that source is also expected. We anal[...]texto impreso
López Maroto, Antonio ; Ruiz Cembranos, José Alberto ; Gammaldi, Viviana | American Physical Society | 2012-11-06We show that the gamma ray spectrum observed with the HESS array of Cherenkov telescopes coming from the Galactic Center region and identified with the source HESS J1745-290 is well fitted by the secondary photons coming from dark matter (DM) an[...]texto impreso
López Maroto, Antonio ; Cruz Dombriz, Álvaro de la ; Ruiz Cembranos, José Alberto ; Gammaldi, Viviana ; Lineros, Roberto A. | Springer | 2013-09-13We study the differences in the gamma-ray spectra simulated by four Monte Carlo event generator packages developed in particle physics. Two different versions of PYTHIA and two of HERWIG are analyzed, namely PYTHIA 6.418 and HERWIG 6.5.10 in For[...]texto impreso
Ruiz Cembranos, José Alberto ; Cruz Dombriz, Álvaro de la ; Gammaldi, Viviana ; Mendez Isla, Miguel | Elsevier B.V. | 2020-01In the era of radio astronomy, the high sensitivity of the Square Kilometre Array (SKA) could play a decisive role in the detection of new radio sources. In this work, we study the SKA sensitivity to the synchrotron radio emission expected by th[...]texto impreso
López Maroto, Antonio ; Ruiz Cembranos, José Alberto ; Gammaldi, Viviana | IOP publishing ltd | 2013-04We 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, 2005 and 2006. In particular, we show that these data are well fi[...]
