We undertake the task of studying non-linear dynamics quantum gravity motivated alternatives to black holes that in classical limit appear as ultra-compact shells matter. develop a formalism should be amenable numerical solution generic situations. For concrete model we focus on spherically symmetric AdS bubble -- shell matter at Buchdahl radius separating Schwarzschild exterior from an interio...

Optical and radio afterglows arising from the shocks by relativistic conical ejecta running into pre-burst massive stellar winds are revisited. Under the homogeneous thin-shell approximation and a realistic treatment for the lateral expansion of jets, our results show that a notable break exists in the optical light curve in most cases we calculated in which the physical parameters are varied w...

Abstract Cloud condensation nuclei (CCN) activities and hygroscopic properties of aerosol particles were studied based on the core-shell model with extended Köhler equation. Three kinds mainly considered: (1) insoluble core soluble inorganic shell; (2) organic shell limited solubility; (3) solubility shell. Results calculations showed that curves different from classical particles. Particle siz...

Six binary-merger progenitors of Supernova 1987A (SN 1987A) with properties close to those the blue supergiant Sanduleak -69 202 are exploded by neutrino heating and evolved until long after shock breakout in three dimensions (3D), continued for light-curve calculations spherical symmetry. Our results confirm previous findings single-star progenitors: (1) 3D neutrino-driven explosions SN 1987A-...

Generally, thin cylindrical shells are susceptible for geometrical imperfections like non-circularity, non-cylindricity, dents, swellings etc. All these geometrical imperfections decrease the static buckling strength of thin cylindrical shells. In this work, neighbourhood effect of two circumferential short dents on the buckling behaviour of thin short stainless steel cylindrical shell is studi...

This work reports a hard self-template method to synthesize core/shell like Fe3O4@C microparticles, in which the Pd nanocrystals can be alternatively incorporated into the carbon shells. The Fe3O4@polyaniline core/shell microspheres were first synthesized as the precursor by in situ polymerization of aniline onto the surface of the Fe3O4 microspheres. In a subsequent carbonization of the precur...