Alicia Herrero
A5044334282- Astrophysics and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Matrix Theory and Algorithms
- Neutrino Physics Research
- Stability and Control of Uncertain Systems
- Black Holes and Theoretical Physics
- Advanced Topics in Algebra
- Dark Matter and Cosmic Phenomena
- Quantum chaos and dynamical systems
- Radio Astronomy Observations and Technology
- Stellar, planetary, and galactic studies
- Geophysics and Gravity Measurements
- Advanced Optimization Algorithms Research
- Particle physics theoretical and experimental studies
- Gamma-ray bursts and supernovae
- Galaxies: Formation, Evolution, Phenomena
- Relativity and Gravitational Theory
- Radiation Therapy and Dosimetry
- Nuclear Physics and Applications
- Astronomy and Astrophysical Research
- Quantum Electrodynamics and Casimir Effect
- Astrophysics and Star Formation Studies
- Advanced Differential Geometry Research
- Fractional Differential Equations Solutions
- Electromagnetic Scattering and Analysis
Universitat Politècnica de València
2014-2024
Instituto de Astrofísica de Canarias
2015
Universitat de València
1999-2002
Universidad de Valladolid
2000
We performed a 4.5-month multi-instrument campaign (from radio to VHE gamma rays) on Mrk421 between January 2009 and June 2009, which included VLBA, F-GAMMA, GASP-WEBT, Swift, RXTE, Fermi-LAT, MAGIC, Whipple, among other instruments collaborations. was found in its typical (non-flaring) activity state, with flux of about half that the Crab Nebula, yet light curves show significant variability at all wavelengths, highest being X-rays. determined power spectral densities (PSD) most wavelengths...
A search for cosmic neutrino sources using six years of data collected by the ANTARES telescope has been performed. Clusters muon neutrinos over expected atmospheric background have looked for. No clear signal found. The most signal-like accumulation events is located at equatorial coordinates R.A. = −468 and decl. −649 corresponds to a 2.2σ fluctuation. In addition, upper limits on flux normalization an E−2 energy spectrum set 50 pre-selected astrophysical objects. Finally, motivated seven...
A search for high-energy neutrinos coming from the direction of Galactic Centre is performed using data recorded by ANTARES neutrino telescope 2007 to 2012. The event selection criteria are chosen maximise sensitivity possible signals produced self-annihilation weakly interacting massive particles accumulated around centre Milky Way with respect atmospheric background. After unblinding, number observed in line sight found be compatible background expectations. 90% C.L. upper limits terms...
The 79-string IceCube search for dark matter in the Sun public data is used to test Secluded Dark Matter models. No significant excess over background observed and constraints on parameters of models are derived. Moreover, also constrain photon model region parameter space with masses between 0.22 ∼ 1 GeV a kinetic mixing ε 10−9, which remains unconstrained. These first photons from neutrino telescopes. It expected that telescopes will be efficient tools by means different searches Sun,...
High-energy neutrinos could be produced in the interaction of charged cosmic rays with matter or radiation surrounding astrophysical sources. Even recent detection extraterrestrial high-energy by IceCube experiment, no neutrino source has yet been discovered. Transient sources, such as gamma-ray bursts, core-collapse supernovae, active galactic nuclei are promising candidates. Multi-messenger programs offer a unique opportunity to detect these transient By combining information provided...
We aimed to analyze the trends in antihypertensive therapy Spain during period 1986 1994, as well change pattern of different drugs, relation national/international recommendations for hypertension treatment.Antihypertensive consumption was studied using defined daily dose (DDD) and DHD (DDD/1000 inhabitants/ day) each drug, by Drug Utilization Research Group European Office World Health Organization.The anatomical classification hypotensive drugs has been made according EPhMRA (European...
The source(s) of the neutrino excess reported by IceCube Collaboration is unknown. TANAMI recently on multiwavelength emission six bright, variable blazars which are positionally coincident with two most energetic events. Objects like these prime candidates to be source highest-energy cosmic rays, and thus associated emission. We present an analysis from using observations ANTARES telescope.The standard methods candidate list search applied years data for muons --- hence their progenitors...
We investigate partial orders on the set of complex square matrices and introduce a new order relation based spectrally orthogonal matrix decompositions. also establish this concept with known orders.
This paper reports a search for spatial clustering of the arrival directions high energy muon neutrinos detected by ANTARES neutrino telescope. An improved two-point correlation method is used to study autocorrelation 3058 candidate events as well cross-correlations with other classes astrophysical objects: sources gamma rays, massive black holes and nearby galaxies. No significant deviations from isotropic distribution expected atmospheric backgrounds are observed.
A Painlevé–Gullstrand synchronization is a slicing of the spacetime by family flat space-like 3-surfaces. For spherically symmetric spacetimes, we show that only exists in region where (dr)2 ⩽ 1, r being curvature radius isometry group orbits (2-spheres). This condition states Misner–Sharp gravitational energy these 2-spheres not negative and has an intrinsic meaning terms norm mean extrinsic vector. It also provides algebraic inequality involving Weyl scalar Ricci eigenvalues. We prove...
This paper proposes to exploit gravitational lensing effects improve the sensitivity of neutrino telescopes intrinsic emission distant blazar populations. strategy is illustrated with a search for cosmic neutrinos in direction four and gravitationally lensed Flat-Spectrum Radio Quasars. The magnification factor estimated each system assuming singular isothermal profile lens. Based on data collected from 2007 2012 by ANTARES telescope, strongest constraint obtained quasar B0218+357, providing...
Hadrontherapy makes it possible to deliver high doses of energy cancerous tumors by using the large deposition in Bragg-peak. However, uncertainties patient positioning and/or anatomical parameters can cause distortions calculation dose distribution. In order maximize effectiveness heavy particle treatments, an accurate monitoring system deposited depending on energy, beam time, and spot size is necessary. The localized this leads generation a thermoacoustic pulse that be detected acoustic...
A study of radial conformal Killing fields (RCKF) in Minkowski space–time is carried out, which leads to their classification into three disjointed classes. Their integral curves are straight or hyperbolic lines admitting orthogonal surfaces constant curvature, whose sign related the causal character field. Otherwise, kinematic properties timelike RCKF given and applications cosmology discussed.
A full chain simulation of the acoustic hadrontherapy monitoring for brain tumours is presented in this work. For study, a proton beam 100 MeV considered. In first stage, Geant4 used to simulate energy deposition and study behaviour Bragg peak. The medium produces local heating that can be considered instantaneous with respect hydrodynamic time scale producing sound pressure wave. resulting thermoacoustic signal has been subsequently obtained by solving equation. propagation simulated FEM...