Browsing by Author "Torres Herrera, Ramon"
Now showing items 1-19 of 19
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An approach to evaporating stars and black holes
Fayos Vallés, Francisco; Torres Herrera, Ramon (2011-09-01)
Article
Open AccessMany models in which the object under study loses all its mass have appeared in the literature. No doubt, the most eminent examples are the models for evaporating black holes and for evaporating stars. Here we describe ... -
Corrigendum: particle production from marginally trapped surfaces of general spacetimes
Senovilla, José MM; Torres Herrera, Ramon (2015-08-24)
Article
Open AccessWe correct some computations presented in section 4.2 of the article (Class. Quantum Grav. {\bf 32} (2015) 085004), concerning the Kerr-Vaidya space-time. The correct, new results, do support the claims in the paper. -
Física aplicada al càlcul estructural arquitectònic
Fayos Vallés, Francisco; Torres Herrera, Ramon (Universitat Politècnica de Catalunya. Iniciativa Digital Politècnica, 2017)
Book
Open AccessEn aquest llibre s’ofereix una introducció moderna al càlcul estructural. Es pretén que les noves generacions d’arquitectes coneguin des dels primers cursos, d’una banda, els fonaments de la ciència que són aplicables a ... -
Jornada de benvinguda ETSAB. Curs 2019-20
Monreal Pujadas, Amadeo; Granell Trias, Enrique; Puig Hors, Assumpció; Onecha Pérez, Ana Belén; Ramon Graells, Antoni; García-Escudero, Daniel; Hernández Sabat, Bernat; Bellmunt, Duna; Torres Herrera, Ramon; Mendoza Ramírez, Héctor; Serrat, Eva; Vilaplana Moreno, Neus (2019-09-27)
Audiovisual
Open AccessJornada de benvinguda ETSAB. Curs 2019-20. Acte de benvinguda on els responsables de les diferents assignatures donen el seu punt de vista sobre la catedral de Notre Dame de Paris. -
Local behaviour of evaporating stars and black holes around the total evaporation event
Fayos Vallés, Francisco; Torres Herrera, Ramon (2010-06-21)
Article
Open Access -
Mechanism of quasistabilization of primordial black holes
Torres Herrera, Ramon (2013-06-17)
Article
Open AccessIt is argued that primordial black holes with initial masses satisfying M<1015 g, instead of having explode, might currently be in a quasistable phase contributing to a tiny fraction of the measured dark matter. This ... -
Non-singular quantum improved rotating black holes and their maximal extension
Torres Herrera, Ramon (2017-06-01)
Article
Open AccessWe add a prescription to the Newman–Janis algorithm in order to use it as a means of finding new extended rotating black hole spacetimes from static spherically symmetric ones. Then, we apply the procedure to a quantum ... -
Nonsingular black holes, the cosmological constant and asymptotic safety
Torres Herrera, Ramon (2017-06-05)
Article
Open AccessQuantum gravitational effects in black hole spacetimes with a cosmological constant ¿ are considered. The effective quantum spacetimes for the black holes are constructed by taking into account the renormalization group ... -
Nonsingular black holes, the cosmological constant, and asymptotic safety
Torres Herrera, Ramon (2017-07-15)
Article
Open AccessQuantum gravitational effects in black hole spacetimes with a cosmological constant ¿ are considered. The effective quantum spacetimes for the black holes are constructed by taking into account the renormalization group ... -
On how energy conservation might prevent black hole explosions and violations of the third law
Torres Herrera, Ramon; Fayos Vallés, Francisco (2013-11-12)
Article
Open AccessWe claim that imposing energy conservation to the emission of Hawking radiation and to the modeling of black hole (BH) evaporation might prevent BH explosions as well as violations of the third law of BH thermodynamics. ... -
On regular rotating black holes
Torres Herrera, Ramon; Fayos Vallés, Francisco (2017-01-01)
Article
Open AccessDifferent proposals for regular rotating black hole spacetimes have appeared recently in the literature. However, a rigorous analysis and proof of the regularity of this kind of spacetimes is still lacking. In this note ... -
On the causal characterization of singularities in spherically symmetric spacetimes
Fayos Vallés, Francisco; Torres Herrera, Ramon (2011-10-14)
Article
Restricted access - publisher's policy -
On the interior of (quantum) black holes
Torres Herrera, Ramon (2013-06-20)
Article
Open AccessDifferent approaches to quantum gravity conclude that black holes may possess an inner horizon, in addition to the (quantum corrected) outer ‘Schwarzschild’ horizon. In this paper we assume the existence of this inner ... -
On the invariant causal characterization of singularities in spherically symmetric spacetimes
Fayos Vallés, Francisco; Torres Herrera, Ramon (2012-04-18)
Article
Open AccessThe causal character of singularities is often studied in relation to the existence of naked singularities and the subsequent possible violation of the cosmic censorship conjecture. Generally, one constructs a model in the ... -
On the quantum corrected gravitational collapse
Torres Herrera, Ramon; Fayos Vallés, Francisco (Elsevier, 2015-06-09)
Article
Open AccessBased on a previously found general class of quantum improved exact solutions composed of non-interacting (dust) particles, we model the gravitational collapse of stars. As the modeled star collapses a closed apparent ... -
Particle production from marginally trapped surfaces of general spacetimes
Senovilla, José MM; Torres Herrera, Ramon (2015-03-26)
Article
Open AccessWe provide a general formalism that allows to analyze the phenomenon of tunneling in arbitrary spacetimes. We show that a flux of particles produced by tunneling through general marginally trapped surfaces may be perceived ... -
Singularity free gravitational collapse in an effective dynamical quantum spacetime
Torres Herrera, Ramon; Fayos Vallés, Francisco (Elsevier, 2014-05-05)
Article
Open AccessWe model the gravitational collapse of heavy massive shells including its main quantum corrections. Among these corrections, quantum improvements coming from Quantum Einstein Gravity are taken into account, which provides ... -
Singularity-free gravitational collapse and asymptotic safety
Torres Herrera, Ramon (Elsevier, 2014-06-02)
Article
Open AccessA general class of quantum improved stellar models with interiors composed of non-interacting (dust) particles is obtained and analyzed in a framework compatible with asymptotic safety. First, the effective exterior, based ... -
The mechanism why colliders could create quasi-stable black holes
Torres Herrera, Ramon; Fayos Vallés, Francisco; Lorente Espín, Oscar (2013-09-09)
Article
Open AccessIt has been postulated that black holes could be created in particle collisions within the range of the available energies for nowadays colliders (LHC). In this paper we analyze the evaporation of a type of black holes ...