Analysis of Dynamic Axial-Symmetric Shells
The aim of this work is to analyze the dynamical behavior of relativistic infinite axial-symmetric shells with flat interior and
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Answer sourceThe aim of this work is to analyze the dynamical behavior of relativistic infinite axial-symmetric shells with flat interior and
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Analytical relations concerning the collapse time in hierarchically clustered cosmological models
By means of numerical methods, we solve the equations of motion for the collapse of a shell of baryonic matter,
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A near-infrared study of the planetary nebula NGC 2346
This paper presents new near-infrared observations of the planetary nebula NGC 2346. The data include a broad K-band image, an
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Branes in Supernova Shells
This paper is firstly intended to review shortly the most recent developments and ideas resulting from the necessity of having
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Cen A and its interaction with the x-ray emitting interstellar medium
As the closest radio galaxy, Centaurus A is a powerful laboratory for the X-ray study of radio-emitting structures and their
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Dynamics of general relativistic spherically symmetric dust thick shells
We consider a spherical thick shell immersed in two different spherically symmetric space-times. Using the fact that the boundaries of
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Dynamics of Massive Shells Ejected in a Supernova Explosion
An expanding shell is accelerated outward by radiation from the remnant star and slowed by ram pressure and accretion as
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Dynamics of radiation dominated branes: Vacuum dynamics from radiation
I point out a symmetry, between equations of state for polytropic fluids, in the equation of motion of a spherically
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Electromagnetic Outflows and GRBs
We study the dynamics of relativistic electromagnetic explosions as a possible mechanism for the production of Gamma-Ray Bursts. We propose
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Electronic states of Mn4+ ions in p-type GaN
The electronic states of manganese in p-type GaN are investigated using photoluminescence (PL) and photoluminescence excitation (PLE) spectroscopies. A series
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Emission-Line Properties of the LMC Bubble N70
We present a spectrophotometric imaging study of the emission bubble N70 (DEM 301) in the Large Magellanic Cloud. N70 is
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Formation of Twin Clusters in a Galactic Tidal Field
The formation of globular clusters is still an unsolved problem. Though most scenarios assume a massive molecular cloud as the
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FUSE Observations of O VI Overlying the Scutum Supershell
We present Far Ultraviolet Spectroscopic Explorer observations of the B0 III star HD 177989 ($l = 17.8^{rm ΓΈ}, b =
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Gamma Ray Bursts as Electromagnetic Outflows
(Abridged) We interpret gamma ray bursts as relativistic, electromagnetic explosions. Specifically, we propose that they are created when a rotating,
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Gamma-Ray Bursts as Internal Shocks Caused By Deceleration
Gamma-ray bursts (GRBs) have been thought to originate from internal shocks that occur about 10^{15} cm from a central site.
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Gamma-ray bursts, BL Lacs, Supernovae, and Interacting Galaxies
Within the framework of star formation in starburst galaxies undergoing interactions, connections among the red quasars, the BL Lacs, and
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Gibbsian Hypothesis in Turbulence
We show that Kolmogorov multipliers in turbulence cannot be statistically independent of others at adjacent scales (or even a finite
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Gravitational hedgehog, stringy hedgehog and stringy sphere
We investigate the solutions of Einstein equations such that a hedgehog solution is matched to different exterior or interior solutions
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Gravitational Wave Emission and Mass Extraction from a Perturbed Schwarzschild Black Hole (continue)
A relativistic model for the emission of gravitational waves from an initially unperturbed Schwarzschild black hole, or spherical collapsing configuration,
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Gravonuclear Instabilities in Post-Horizontal-Branch Stars
We investigate the gravonuclear instabilities reported by Bono et al. (1997a,b) during the onset of helium-shell burning at the end
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Growth Mechanisms and Oxidation-Resistance of Gold-Coated Iron Nanoparticles
We report the chemical synthesis of Fe-core/Au-shell nanoparticles by a reverse micelle method, and the investigation of their growth mechanisms
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HD 161796 (IRAS 17436+5003)
Past imaging observations of a post-AGB star, HD 161796, have probed different parts of its circumstellar shell which correspond to
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High-energy neutrinos and hard $Ξ³$-rays in coincidence with Gamma Ray Bursts
The observations suggest that $Ξ³$-ray bursts (GRBs) are produced by jets of relativistic cannonballs (CBs), emitted in supernova (SN) explosions.
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High-latitude molecular clouds and near-by OB associations
The Galactic distribution of the high-latitude molecular clouds is considered. It is suggested that the majority of these clouds are
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