On the Generation of Sound from the Primordial Turbulence in an Expanding Universe. II : Refinement of the Formalism
スポンサーリンク
概要
- 論文の詳細を見る
The aim of this paper is to remedy two defects of our formalism for dealing with the generation of sound from the primordial cosmic turbulence. One is the fact that the true retarded Green's function in the Friedmann universe to describe the propagation of sound waves to be generated has not explicitly been settled. Another is the fact that the cosmological counterpart of Crighton's formula for the intensity of sound at the center of a static turbulent fluid sphere has been derived by invoking the principle of reciprocity to that of Lighthill's intensity formula whose underlying condition cannot be satisfied in the real universe. It is shown that the refinement leads to a very simple formula for the intensity of sound at the center of the expanding turbulent fluid sphere within the acoustic event horizon, which shows further that the main contribution to the intensity comes from the acoustic past "time-like" region rather than from the acoustic past "light-cone".
- 理論物理学刊行会の論文
- 1974-05-25
著者
-
Nariai Hidekazu
Research Institute For Theorerical Physics Hiroshima University
-
NARIAI Hidekazu
Research Institute for Theoretical Physics, Hiroshima University
関連論文
- On the Dissipation of Primordial Turbulence in the Expanding Universe
- Propagators for a Quantized Scalar Field in a Static Closed Universe
- On the Non-Linear Effect of Cosmic Fluid in an Expanding Universe
- On a Quantized Scalar Field in an Isotropic Closed Universe
- On a Closure Hypothesis in the Theory of Cosmic Turbulence
- On the Acoustic Decay of Primordial Cosmic Turbulence
- On Anisotropic and Homogeneous Cosmological Models in the Renormalized Theory of Gravitation
- On the Creation of Scalar Particles in an Early Stage of the Friedmann Closed-Universe
- Some Higher Dimensional Vacuum Solutions of Einstein Equations with a Cosmological Constant
- Some Comments on a Stability of the S^^〜_2 ⊗ S_2-Type Space-Time
- On the Creation of Scalar Particles in an Isotropic Universe
- Propagators for a Quantized Scalar Field in Some Isotropic Universe
- A Metric Representation of Belavin's Yang-Mills Pseudoparticle Solution and Its Relation to Some Isotropic Universe
- On the Definition of a Positive Frequency Part for a Quantized Scalar Field in Several Robertson-Walker Universes
- Hydrodynamic Calculations of Spherical Gravitational Collapse in the Scalar-Tensor Theory of Gravity
- On the Viscous Damping of Gravitational and Rotational Waves in Any Regular Model-Universe Based on a Modified Theory of General Relativity
- Propagators for a Scalar Field in a Homogeneous Expanding Universe. I : Case of the Friedmann Universes
- Electrodynamics in the Expanding Universe
- On the Canonical Formalism of the Gravitational Field in the Expanding Universe
- On a Quantized Scalar Field in Some Bianchi-Type I Universe. II : DeWitt's Two Vacuum States Connected Causally
- Initial Behavior of a Quantized Scalar Field and the Associated Pair-Creation in Several Isotropic Closed and Open Universes
- Chapter III Formation of Proto-Galaxies in the Expanding Universe : Gravitational instability
- On the Tests fo Gravitational Theories in Terms of an Artificial Satellite
- On a Quantized Scalar Field in Some Bianchi-Type I Universe
- On the Applicability of a Dust-like Model to a Collapsing or Anti-Collapsing Star at High Temperature
- On the Problem of Gravitational Collapse
- A Simple Model for Gravitational Collapse with Pressure Gradient
- On the Gravitational Instability in an Expanding Universe : Reformulation of Lifshitz's Theory
- Initial Behavior of a Quantized Scalar Field and the Associated Pair-Creation in Several Anisotropic Universes
- An Oscillating Model for Gravitational Collapse with Pressure Gradient
- Propagators for a Scalar Field in Some Bianchi-Type Universe
- A Simple and Well-Adjusted Exterior Metric for a Collapsing or Anti-Collapsing Star
- A Cosmological Version of Flatness Conditions in General Relativity
- Quantum Theory of Fields in an Expanding Space. I
- On a Canonical Treatment of the Einstein Equations in an Expanding Universe : Isotropic Coordinate Conditions
- On the Boundary Conditions in General Relativity
- Behavior of the Central Region of a Collapsing Star with Spherical Symmetry and Pressure Gradient
- On the Creation of Particles in a Robertson-Walker Universe
- On the Generation of Sound from the Primordial Turbulence in an Expanding Universe
- On the Gravito-C-Field in an Empty Region with Spherical Symmetry
- Model-Universes in Hoyle's Cosmology
- Hydrodynamical Equations for a Collapsing Object with Spherical Symmetry in Terms of the Scalar-Tensor Theory of Gravity
- On the Non-Linear Effect of Cosmic Fluid in an Expanding Universe. II : Refinement and Extension of the Formalism
- The Optical Appearance of a Collapsing Star in Terms of the Scalar-Tensor Theory of Gravitation
- Dynamics of a Rotating Gaseous Ellipsoid in an Expanding Universe
- Quantization of the Gravitational Field in the Expanding Universe
- On a Perfect-Fluid Sphere with Uniform Density
- On the Removal of Initial Singularity in a Big-Bang Universe in Terms of a Renormalized Theory of Gravitation. II : Criteria for Obtaining a Physically Reasonable Model
- The Gravitational Instability in the Lemaitre Universe
- Gravitational Instability in the Brans-Dicke Cosmology
- On the Brans Solution in the Scalar-Tensor Theory of Gravitation
- On the Average Effect of a Highly Turbulent Gravito-Hydrodynamic Field in the Hadron Era of the Universe. III : Complete Set of Dynamical Equations
- On the Removal of Initial Singularity in a Big-Bang Universe in Terms of a Renormalized Theory of Gravitation. I : Examination of the Present Status and a New Approach
- On Characteristic Turbulent Quantities at the Bounce Epoch in Our Hadron-Dominatcd Model of the Universe
- On the Creation of Scalar Particles in Some Anisotropic Universe
- The Lagrangian Approach to the Gravitational Instability in an Expanding Universe
- On Some Peculiar Role of the Cosmological Constant in the General Theory of Relativity and in the Schrodinger Theory of Non-Symmetric Field
- On the Spectral Shift of Light Rays Emitted from a Pulsating Object
- On a New Approach to Cosmology
- On the Concept of Regraduation in General Relativity
- An Oscillating Perfect-Fluid Sphere with Uniform Density
- Canonical Approach to the Creation of Scalar Particles in the Chitre-Hartle Model-Universe
- On the Generation of Sound from the Primordial Turbulence in an Expanding Universe. II : Refinement of the Formalism
- Hamiltonian Approach to the Dynamics of Expanding Homogeneous Universes in the Brans-Dicke Cosmology
- Model-Universes in Hoyle's Cosmology. II : The World-Line of Fluid Matter
- Newtonian Hydrodynamics in an Expanding Universe in Terms of the Scalar-Tensor Theory
- The Behavior of a Massless Scalar Field in a Closed Universe