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Holographic Dark Energy Characterized by the Total Comoving Horizon and Insights to Cosmological Constant and Coincidence Problem
Holographic Dark Energy the Total Comoving Horizon Insights Cosmological Constant Coincidence Problem
2012/2/21
The observed acceleration of the present universe is shown to be well explained by the holographic dark energy characterized by the total comoving horizon of the universe ($\eta$HDE). It is of interes...
An iterative method in a probabilistic approach to the spectral inverse problem: Differential emission measure from line spectra and broadband data
the spectral inverse problem Differential emission measure
2011/1/11
Inverse problems are of great importance in astrophysics for deriving information about the physical characteristics of hot optically thin plasma sources from their EUV and X-ray spectra. We describe ...
The gravitino problem in supersymmetric warm inflation
gravitino problem supersymmetric warm inflation
2010/11/16
The warm inflation paradigm considers the continuous production of radiation during inflation
due to dissipative effects. In its strong dissipation limit, warm inflation gives way to a radiation domi...
Uniqueness of collinear solutions for the relativistic three-body problem
Uniqueness of collinear solutions relativistic three-body problem
2010/11/16
Continuing work initiated in an earlier publication [Yamada, Asada, Phys. Rev. D 82, 104019
(2010)], we investigate collinear solutions to the general relativistic three-body problem. We prove the un...
A geometric solution to the coincidence problem, and the size of the landscape as the origin of hierarchy
coincidence problem size origin of hierarchy
2010/11/16
Without assuming necessary conditions for observers such as galaxies or entropy production, we
show that the causal patch measure predicts the coincidence of vacuum energy and present matter
density...
A possible solution to the mass-loss problem in M-type AGB stars
mass-loss problem M-type AGB stars
2010/11/12
Mass loss is a fundamental, observationally well-established feature of AGB stars but many aspects of this process still remain to be understood. To date,self-consistent dynamical models of dust-drive...
Resonant Destruction as a Possible Solution to the Cosmological Lithium Problem
Resonant Destruction Cosmological Lithium Problem
2010/11/10
We explore a nuclear physics resolution to the discrepancy between the predicted standard
BBN abundance of 7Li and its observational determination in metal-poor stars. The the-
oretical 7Li abundanc...
The Luminosity Problem: Testing Theories of Star Formation
The Luminosity Problem Testing Theories Star Formation
2011/1/10
Low-mass protostars are less luminous than expected. This luminosity problem is important because the observations appear to be inconsistent with some of the basic premises of star formation theory. T...
Towards a complete treatment of the cosmological recombination problem
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2011/1/7
A new approach to the cosmological recombination problem is presented, which completes our previous analysis on the effects of two-photon processes during the epoch of cosmological hydrogen recombinat...
The missing gas problem in GRB host galaxies: evidence for a highly ionised component
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/28
There is considerable discrepancy between the amount of X-ray absorption and that inferred from optical (rest frame UV) as measured along gamma-ray burst (GRB) sight lines, with the former being typic...
A Note on the Inverse Problem with LTB Universes
Cosmology and Extragalactic Astrophysics (astro-ph.CO) General Relativity and Quantum Cosmology (gr-qc)
2010/12/23
The inverse problem with Lema\^itre-Tolman-Bondi (LTB) universe models is discussed. The LTB solution for the Einstein equations describes the spherically symmetric dust-filled spacetime. The LTB solu...
ITERATION FACTORS IN THE LINE FORMATION PROBLEM WITH FREQUENCY DEPENDENT SOURCE FUNCTION
Radiative transfer Line: formation methods: numerical
2010/10/29
In this paper some iteration factors families introduced previously to solve the pure line transfer problem are generalized to the case when the background continuum is taken into account.The converge...
Cauchy Problem and Green's Functions for First Order Differential Operators and Algebraic Quantization
First Order Differential Operators Algebraic Quantization
2010/3/19
Existence and uniqueness of global solutions to the Cauchy problem and of unique advanced and retarded fundamental solutions (Green's functions) will be proved for a general class of first order linea...
Effect of Perturbations in Coriolis and Centrifugal Forces on the Nonlinear Stability of Equilibrium Point in Robe's Restricted Circular Three-Body Problem
Perturbations Centrifugal Forces Coriolis three-body problem
2009/9/4
The effect of perturbations in Coriolis and cetrifugal forces on the nonlinear stability of the equilibrium point of the Robe's (1977) restricted circular three-body problem has been studied when the ...
Tidal heating: a restricted three body problem investigation of the spitzer and weinberg approximations
Tidal heating weinberg approximations spitzer
2009/7/9
Tidal heating: a restricted three body problem investigation of the spitzer and weinberg approximations。