Results 41 to 50 of about 9,886 (203)
A Three-decade X-band VLBI Study of 3CR Lobe-dominated Quasar Nuclei
EPJ Web of Conferences, 2013 We report X-band VLBI observations of several 3CR lobe-dominated quasar nuclei from 1981 to 2010, mostly obtained with the NRAO VLBA. The goal is to follow flux density outbursts and to fully determine the jet morphology and kinematics on 1-100 pc scales.
Hough David H.
doaj +1 more source
Proper Motions of Jets on the Kiloparsec Scale: New Results with HST
Galaxies, 2017 The Hubble Space Telescope recently celebrated 25 years of operation. Some of the first images of extragalactic optical jets were taken by HST in the mid-1990s; with time baselines on the order of 20 years and state-of-the-art astrometry techniques, we ...
Eileen T. Meyer +9 more
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Observing Air Showers from Cosmic Superluminal Particles [PDF]
, 1997 The Poincar\'e relativity principle has been tested at low energy with great accuracy, but its extrapolation to very high-energy phenomena is much less well established. Lorentz symmetry can be broken at Planck scale due to the renormalization of gravity
Gonzalez-Mestres, Luis
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Uniform Apparent Superluminal Motion in 4C39.25 [PDF]
Symposium - International Astronomical Union, 1988 The radiosource 4C39.25 (0923+392) is an 18 mag quasar with a redshift of 0.699. Throughout the seventies its compact structure at centimetric wavelengths consisted of 2 components separated by an angle of about 2 milliarcseconds (mas). In the eighties the structure has been found to consist of 3 components (Marcaide et al., 1985; Shaffer et al., 1987).
C.J. Schalinski +3 more
openaire +1 more source
Extended Linear and Nonlinear Lorentz Transformations and Superluminality
Advances in High Energy Physics, 2013 Two broad scenarios for extended linear Lorentz transformations (ELTs) are modeled in Section 2 for mixing subluminal and superluminal sectors resulting in standard or deformed energy-momentum dispersions.
Dara Faroughy
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3D Simulations of Relativistic Precessing Jets Probing the Structure of Superluminal Sources [PDF]
, 2003 We present the results of a three-dimensional, relativistic, hydrodynamic simulation of a precessing jet into which a compact blob of matter is injected.
Ewald Müller +8 more
core +2 more sources
Can gravitation accelerate neutrinos?
, 2012 The Lagrangian equations of motion for massive spinning test particles (tops) moving on a gravitational background using General Relativity are presented. The paths followed by tops are nongeodesic.
Asenjo, Felipe A., Hojman, Sergio A.
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Constructing Time Machines [PDF]
, 2002 The existence of time machines, understood as spacetime constructions exhibiting physically realised closed timelike curves (CTCs), would raise fundamental problems with causality and challenge our current understanding of classical and quantum theories ...
D'Eath P. D., Deser S., Kohlprath E.
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Observation of superluminal geometrical resonances in Bi2Sr2CaCu2O8+x intrinsic Josephson junctions
, 2010 We study Fiske steps in small Bi2Sr2CaCu2O8+x mesa structures, containing only few stacked intrinsic Josephson junctions. Careful alignment of magnetic field prevents penetration of Abrikosov vortices and facilitates observation of a large variety of ...
A. B. Kulakov +6 more
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Causal explanation for observed superluminal behavior of microwave propagation in free space
, 2001 In this paper we present a theoretical analysis of an experiment by Mugnai and collaborators where superluminal behavior was observed in the propagation of microwaves.
A.L. Xavier +28 more
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