We investigate the extension of isotropic interior solutions for static self-gravitating systems to include effects anisotropic spherically symmetric gravitational sources by means decoupling realised via minimal geometric deformation approach. In particular, matching conditions at surface star with outer Schwarzschild space-time are studied in great detail, and we describe how generate, from a single physically acceptable solution, new families whose physical acceptability is also inherited...

The minimal geometric deformation approach was introduced in order to study the exterior spacetime around spherically symmetric self-gravitating systems, such as stars or similar astrophysical objects, Randall–Sundrum brane-world framework. A consistent extension of this is developed here, which contains modifications both time component and radial a metric. modified Schwarzschild geometry obtained an example its simplest application, new solution that potentially useful describe also presented.

We investigate how a spherically symmetric fluid modifies the Schwarzschild vacuum solution when there is no exchange of energy-momentum between and central source metric. This system described by means gravitational decoupling realised via minimal geometric deformation approach, which allows us to prove that must be anisotropic. Several cases are then explicitly shown.

We consider a solution of the effective four-dimensional Einstein equations, obtained from general relativistic Schwarzschild metric through principle Minimal Geometric Deformation (MGD). Since brane tension can, in general, introduce new singularities on Eötvös model MGD framework, we require absence observed singularities, order to constrain tension. then study corresponding Bose–Einstein condensate (BEC) gravitational system and determine critical stability region BEC stellar...

We consider a solution of the effective four-dimensional brane-world equations, obtained from general relativistic Schwarzschild metric via principle minimal geometric deformation, and investigate corresponding signatures stemming possible existence warped extra-dimension. In particular, we derive bounds on an extra-dimensional parameter, closely related with fundamental gravitational length, experimental results classical tests relativity in Solar system.

We investigate how a spherically symmetric scalar field can modify the Schwarzschild vacuum solution when there is no exchange of energy-momentum between and central source metric.This system described by means gravitational decoupling Minimal Geometric Deformation (MGD-decoupling), which allows us to show that, under MGD paradigm, modified in such way that naked singularity appears.

This paper proves that from the algebraic point of view ELKO spinor fields belong together with Majorana to a wider class, so-called flagpole fields, corresponding class 5, according Lounesto field classification. We show moreover constraints imply any 5 is such 2-component entering its structure have opposite helicities. The proof our statement based on general classification all relations and values taken by their associated bilinear covariants, can eventually shed some new light...

We consider the Riemann-Cartan geometry as a basis for Einstein-Sciama-Kibble theory coupled to spinor fields: we focus on f(R) and conformal gravities, regarding flag-dipole fields, type-(4) fields under Lounesto classification. study such theories in specific cases given, instance, by cosmological scenarios: find that background Dirac equation admits solutions are not but fact aforementioned flag-dipoles ones. These important from theoretical perspective, they evince necessarily determined...

The glueball dark matter, in the pure $\mathrm{SU}(N)$ Yang-Mills theory, engenders stars that comprise self-gravitating compact configurations of scalar fields. Corrections to highest frequency gravitational wave radiation emitted by star mergers on a fluid brane with variable tension, implemented minimal geometric deformation, are derived, and their consequences analyzed. Hence, braneworld shown be better detectable LIGO eLISA experiments.

In this paper we apply the strong deflection limit approach to investigate gravitational lensing phenomena beyond general relativity. This is accomplished by considering effects related black hole solutions that emerge out of domain Einstein gravity, namely, ones acquired from method geometric deformation and Casadio–Fabbri–Mazzacurati (CFM) brane-world holes. The observables, for those metrics, are compared with standard Schwarzschild case. We prove holes could have significantly different...

After reviewing the Lounesto spinor field classification, according to bilinear covariants associated a field, we call attention and unravel some prominent features involving unexpected properties about fields under such classification. In particular, pithily focus on new aspects --- as well current concrete possibilities. They mainly arise when deal with non-standard concerning, in their applications physics.

An intrinsic mass generation mechanism for exotic ELKO dark matter fields is scrutinized, in the context of very special relativity (VSR). Our results are reported on unraveling inequivalent spin structures that educe an additional term associated Dirac operator. Contrary to spinor dimension 3/2, this precluded be absorbed as a shift some gauge vector potential, regarding equations fields. It leads dynamical constraints can intrinsically converted into mechanism, with encoded symmetries...

The correspondence between sound waves, in a de Laval propelling nozzle, and quasinormal modes emitted by brane-world black holes deformed 5D bulk Weyl fluid are here explored scrutinised. analysis of waves patterns nozzle at laboratory, reciprocally, is shown to provide relevant data about the its on-brane projection, comprised minimal geometrically compact stellar distribution on brane. Acoustic perturbations gas flow proved coincide solutions fluid, geometric deformation procedure. Hence,...

The Shannon based conditional entropy that underlies five-dimensional Einstein-Hilbert gravity coupled to a dilaton field is investigated in the context of dynamical holographic AdS/QCD models. Considering UV and IR dominance limits such models, shown shed some light onto meson classification schemes, which corroborate with existence light-flavour mesons lower spins Nature. Our analysis supported by correspondence between statistical mechanics information establishes physical grounds...

Recent studies indicate that the configurational entropy is an useful tool to investigate stability and (or) relative dominance of states for diverse physical systems. examples comprise connection between variation this quantity fraction light mesons glueballs observed in hadronic processes. Here we develop a technique defining AdS-Schwarzschild black hole. The achieved result corroborates consistency with Hawking-Page phase transition. Namely, hole will be shown increase temperature. In...

The conditional entropy of glueball states is calculated using a holographic description. Glueball are represented by supergravity dual picture, consisting 5-dimensional graviton-dilaton action dynamical AdS/QCD model. studied as function the spin and mass, providing information about stability states.

We apply the tunnelling method for emission and absorption of Elko particles in event horizon a black string solution. show that are emitted at expected Hawking temperature from strings, but with quite different signature respect to Dirac particles. employ Hamilton-Jacobi technique hole tunnelling, by applying WKB approximation coupled system Dirac-like equations governing particle dynamics. As typical signature, shown produce same standard strings. However we prove they present probability...

We derive the Hawking spectrum of fermions emitted by a minimally geometric deformed (MGD) black hole. The MGD naturally describes quantum effects on geometry in form length scale related, for instance, to existence extra dimensions. dynamics is described context generalised uncertainty principle and likewise contains associated with nature space-time. then show that emission practically indistinguishable from thermal large hole masses, but total flux can vanish small finite mass. This...

The extended minimal geometric deformation (EMGD) is employed on the fluid membrane paradigm, to describe compact stellar objects as Bose--Einstein condensates (BEC) consisting of gravitons. black hole quantum portrait, besides deriving a preciser phenomenological bound for brane tension, then scrutinized from point view configurational entropy. It yields range critical density EMGD BEC, whose entropy has global minima suggesting stability BEC.

The method of geometric deformation (MGD) is here employed to study compact stellar configurations, which are solutions the effective Einstein-Dirac coupled field equations on fluid branes. Non-linear, self-interacting, fermionic fields then derive MGD Dirac stars, whose properties analyzed and discussed. star maximal mass shown increase as an specific function spinor self-interaction coupling constant, in a realistic model involving most strict phenomenological current bounds for brane tension.

The method of minimal geometric deformation (MGD) is used to derive static, strongly gravitating, spherically symmetric, compact stellar distributions that are solutions the Yang-Mills-Einstein-Dirac coupled field equations on fluid membranes with finite tension. Their characterize MGD Yang-Mills-Dirac stars, whose mass has order Chandrasekhar mass, once range both fermionic self-interaction and Yang-Mills coupling constants suitably chosen. Physical features stars then discussed their...