Classical and relativistic conservation of momentum flux in radio-galaxies
A new set of laws of motion for turbulent jets propagating in an intergalactic medium characterized by a decreasing density is derived by applying conservation of momentum flux both in the classical...
View ArticleScattering of particles by deformed non-rotating black holes [Cross-Listing]
We study the excitation of axial quasi-normal modes of deformed non-rotating black holes by test-particles and we compare the associated gravitational wave signal with that expected in general...
View ArticleEnergetics and optical properties of $6$-dimensional rotating black hole in...
We study physical processes around a rotating black hole in pure Gauss-Bonnet (GB) gravity. In pure GB gravity, gravitational potential has slower fall off as compared to the corresponding Einstein...
View ArticleJittering-jets explosion triggered by the standing accretion shock instability
We show that the standing accretion shock instability (SASI) that has been used to ease the shock revival in core collapse supernovae (CCSNe) neutrino-driven explosion models, might play a much more...
View ArticleSchr\"odinger Equation of a particle in an Uniformly Accelerated Frame and...
In this article we have developed a formalism to obtain the Schr$\ddot{\rm{o}}$dinger equation for a particle in a frame undergoing an uniform acceleration in an otherwise flat Minkowski space-time...
View ArticleHadronic interactions of primary cosmic rays with the FLUKA code
The measured fluxes of secondary particles produced by the interactions of cosmic rays with the astronomical environment represent a powerful tool to infer some properties of primary cosmic rays. In...
View ArticleFeasibility of VHE gamma ray detection by an array of imaging atmospheric...
The last 20 years have seen the development of new techniques in Astroparticle Physics providing access to the highest end of the electromagnetic spectrum. It has been shown that some sources emit...
View ArticlePost-Tolman-Oppenheimer-Volkoff formalism for relativistic stars [Replacement]
Besides their astrophysical interest, compact stars also provide an arena for understanding the properties of theories of gravity that differ from Einstein’s general relativity. Numerous studies have...
View ArticleApplication of Sturm’s theorem to marginal stable circular orbits of a test...
In terms of Sturm’s theorem, we reexamine a marginal stable circular orbit (MSCO) such as the innermost stable circular orbit (ISCO) of a timelike geodesic in any spherically symmetric and static...
View ArticleMarginally stable circular orbit of a test body in spherically symmetric and...
We study a marginally stable circular orbit (MSCO) such as the innermost stable circular orbit (ISCO) of a timelike geodesic in any spherically symmetric and static spacetime. It turns out that the...
View ArticleJ021659-044920: A relic giant radio galaxy at z ~ 1.3
We report the discovery of a relic Giant Radio Galaxy (GRG) J021659-044920 at redshift $z \sim 1.3$ that exhibits large-scale extended, nearly co-spatial, radio and X-ray emission from radio lobes, but...
View ArticleOverlapping inflows as catalysts of AGN activity – II: Relative importance of...
The main challenge for understanding the fuelling of supermassive black holes in active galactic nuclei is not to account for the source of fuel, but rather to explain its delivery from the boundaries...
View ArticleOn the Nature of X-ray Surface Brightness Fluctuations in M87
X-ray images of galaxy clusters and gas-rich elliptical galaxies show a wealth of small-scale features which reflect fluctuations in density and/or temperature of the intra-cluster medium. In this...
View ArticleScattering of particles by deformed non-rotating black holes
We study the excitation of axial quasi-normal modes of deformed non-rotating black holes by test-particles and we compare the associated gravitational wave signal with that expected in general...
View ArticleEnergetics and optical properties of $6$-dimensional rotating black hole in...
We study physical processes around a rotating black hole in pure Gauss-Bonnet (GB) gravity. In pure GB gravity, gravitational potential has slower fall off as compared to the corresponding Einstein...
View ArticleConstraining the parameters of the pulsar wind nebula DA 495 and its pulsar...
We present spectral and timing analyses of the X-ray emission from the pulsar wind nebula DA 495 and its central object, J1952.2+2925, suggested to be the pulsar, using archival Chandra and XMM-Newton...
View ArticleApplication of Sturm’s theorem to marginal stable circular orbits of a test...
In terms of Sturm’s theorem, we reexamine a marginal stable circular orbit (MSCO) such as the innermost stable circular orbit (ISCO) of a timelike geodesic in any spherically symmetric and static...
View ArticleLimits on dark matter proton scattering from neutrino telescopes using...
Limits on dark matter spin dependent elastic scattering cross section on protons derived from IceCube data are obtained for different dark matter annihilation channels using micrOMEGAs. The uncertainty...
View ArticlePost-Tolman-Oppenheimer-Volkoff formalism for relativistic stars [Replacement]
Besides their astrophysical interest, compact stars also provide an arena for understanding the properties of theories of gravity that differ from Einstein’s general relativity. Numerous studies have...
View ArticleEffects of pseudoscalar condensation on the cooling of neutron stars...
In this work we consider the effect that the appearance of pseudoscalar condensates in a neutron star can have on its cooling rate. We make no particular assumption on the origin and characteristics of...
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