67 citations · 400 across the 18 of their papers we have counts for
18 papers
Astrophysical evidence for the existence of black holes
Annalisa Celotti, John C. Miller, Dennis W. Sciama
Following a short account of the history of the idea of black holes, we present a review of the current status of the search for observational evidence of their existence aimed at…
On the Interaction Between Cosmic Rays and Dark Matter Molecular Clouds - II. The Age Distribution of Cosmic Ray Electrons
D. W. Sciama
We explore further the proposal in paper I of this series that the confinement time of cosmic ray nuclei in the Milky Way is determined by their interaction with dark matter molecu…
On the Interaction Between Cosmic Rays and Dark Matter Molecular Clouds in the Milky Way. l Basic Considerations
D. W. Sciama
We explore some basic observational consequences of assuming that the dark matter in the Milky Way consists mainly of molecular clouds, and that cosmic rays can penetrate these clo…
Sonoluminescence as a QED vacuum effect. II: Finite Volume Effects
Stefano Liberati, Matt Visser, Francesco Belgiorno +1
In a companion paper [quant-ph/9904013] we have investigated several variations of Schwinger's proposed mechanism for sonoluminescence. We demonstrated that any realistic version o…
Sonoluminescence as a QED vacuum effect. I: The Physical Scenario
Stefano Liberati, Matt Visser, Francesco Belgiorno +1
Several years ago Schwinger proposed a physical mechanism for sonoluminescence in terms of changes in the properties of the quantum-electrodynamic (QED) vacuum state. This mechanis…
Sonoluminescence: Two-photon correlations as a test of thermality
Francesco Belgiorno, Stefano Liberati, Matt Visser +1
In this Letter we propose a fundamental test for probing the thermal nature of the spectrum emitted by sonoluminescence. We show that two-photon correlations can in principle discr…
Diffuse Ionization in the Milky Way and Sterile Neutrinos
R. N. Mohapatra, D. W. Sciama
We propose the radiative decay of sterile neutrinos which fill a fraction of the halo dark matter with a mass of 27.4 eV and lifetime of sec. as a way to explain the…
Are Neutrino Oscillations Compatible with the Decaying Neutrino Theory for the Ionisation of Hydrogen in the Interstellar Medium?
D. W. Sciama
Recent Super-Kamiokande data have greatly strengthened the hypothesis that the atmospheric neutrino anomaly is mainly due to nearly maximal oscillations between and either $ν…
Optical Emission Lines from Warm Interstellar Clouds - a Decisive Test of the Decaying Neutrino Theory
D. W. Sciama
Recently developed instruments such as the Taurus Tunable Filter and WHAM should be able to detect some or all of the optical emission lines H, [OI] 6300, [SII] 6717, [NI]…
Sonoluminescence as a QED vacuum effect: Probing Schwinger's proposal
S. Liberati, F. Belgiorno, Matt Visser +1
Several years ago Schwinger proposed a physical mechanism for sonoluminescence in terms of photon production due to changes in the properties of the quantum-electrodynamic (QED) va…
Sonoluminescence: Bogolubov coefficients for the QED vacuum of a time-dependent dielectric bubble
Matt Visser, S. Liberati, F. Belgiorno +1
We extend Schwinger's ideas regarding sonoluminescence by explicitly calculating the Bogolubov coefficients relating the QED vacuum states associated with changes in a dielectric b…
Updated Parameters for the Decaying Neutrino Theory and EURD Observations of the Diffuse UV Background
D. W. Sciama
Various recent observational developments are here used to make a more critical analysis of the parameter space of the decaying neutrino theory for the ionisation of the interstell…
Decaying Neutrinos and the Flattening of the Galactic Halo
D. W. Sciama
The recently constructed Dehnen-Binney set of mass models for the Galaxy is used to show that the decaying neutrino theory for the ionisation of the interstellar medium (Sciama 199…
An updated precision estimate of the Hubble constant and the age and density of the Universe in the decaying neutrino theory
D. W. Sciama
We here update the derivation of precise values for the Hubble constant H_0, the age t_0 and the density parameter Omega*h^2 of the universe in the decaying neutrino theory for the…
On the Ionisation of Warm Opaque Interstellar Clouds and the Intercloud Medium
D. W. Sciama
In this paper we use a number of observations to construct an integrated picture of the ionisation in the interiors of quiescent warm opaque interstellar clouds and in the interclo…
Resonant spin-flavour precession of neutrinos and pulsar velocities
E. Kh. Akhmedov, A. Lanza, D. W. Sciama
Young pulsars are known to exhibit large space velocities, up to km/s. We propose a new mechanism for the generation of these large velocities based on an asymmetric emissio…
Resonant neutrino spin-flavor precession and supernova shock revival
E. Kh. Akhmedov, A. Lanza, S. T. Petcov +1
A new mechanism of supernova shock revival is proposed, which involves resonant spin--flavor precession of neutrinos with a transition magnetic moment in the magnetic field of the…
Reconstructing Positions \& Peculiar Velocities of Galaxy Clusters within 25000 km/sec: The Bulk Velocity
Enzo Branchini, Manolis Plionis, Dennis W. Sciama
Using a dynamical 3-D reconstruction procedure we estimate the peculiar velocities of Abell/ACO galaxy clusters from their measured redshift within 25000 km/sec. The recons…