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Trickle-Down Is The Solution（To The Planetary Core Formation Problem）（图）
Trickle-Down The Solution The Planetary Core Formation
2017/12/19
Scientists have long pondered how rocky bodies in the solar system—including our own Earth—got their metal cores. According to research conducted by The University of Texas at Austin, evidence points ...
Graphic solution of R-W metric for the case of positive curvature and cosmic entire space and time
R-W metric hypersphere cosmology large scale structure of the universe space and time absolutism relativism
2011/9/26
The vivid image of R-W metric for the case of hypersphere is given; The hypersphere is proposed as the only model for the physical universe; The cosmic radius R(t) may be defined as a cosmic broad tim...
The charged dust solution of Ruban -- matching to Reissner--Nordström and shell crossings
shell crossings even half cycle oscillation minimal size
2011/10/14
The maximally extended Reissner--Nordstr\"om (RN) manifold with $e^2 < m^2$ begs for attaching a material source to it that would preserve the infinite chain of asymptotically flat regions and evolve ...
A modified star formation law as a solution to open problems in galaxy evolution
galaxies: evolution – galaxies: formation – galaxies: stellar content –galaxies: haloes
2011/10/13
In order to reproduce the low mass end of the stellar mass function, most current models of galaxy evolution invoke very efficient supernova feedback. This solution seems to suffer from several shortc...
Domain wall solution in $F(R)$ gravity and variation of the fine structure constant
solution gravity variation fine structure
2011/10/18
We construct a domain wall solution in $F(R)$ gravity. We first compare a scalar field theory having a runaway type potential with a corresponding scalar field theory obtained through a conformal tran...
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...
An exact cosmological solution of a Scalar-Tensor Gravity theory compatible with the $\Lambda$CDM model
exact cosmological solution Scalar-Tensor Gravity theory compatible $\Lambda$CDM model
2010/11/15
consider the massive Scalar-Tensor theory in the Jordan frame F() = K22,Z() = 1, and U() = (1/2)m22, F() corresponds to a constant Brans-Dicke parameter !BD = 1/4K2. The constaint of the solar s...
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...
A Series Solution to the Luminosity Distance in a Flat LCDM Universe
Cosmological distances Numerical methods
2010/11/15
Cosmological observations indicate that our universe is flat and dark energy (DE)
dominated at present. The luminosity distance plays an important role in the investigation
of the evolution and stru...
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...
Simultaneous solution of Kompaneets equation and Radiative Transfer equation in the photon energy range 1 - 125 KeV
Diffuse radiation'Kompaneets equation radiative transfer X-rays
2010/11/12
Radiative transfer equation in plane parallel geometry and Kompaneets equa-tion is solved simultaneously to obtain theoretical spectrum of 1-125 KeV photon energy range. Diffuse radiation field is cal...
A Mismatch in the Ultraviolet Spectra between Low-Redshift and Intermediate-Redshift Type Ia Supernovae as a Possible Solution to the U-Band Anomaly
Cosmology and Extragalactic Astrophysics (astro-ph.CO) Solar and Stellar Astrophysics (astro-ph.SR)
2011/1/4
We present Keck high-quality rest-frame ultraviolet (UV) through optical spectra of 21 Type Ia supernovae (SNe Ia) in the redshift range 0.11 < z < 0.37 and a mean redshift of 0.22 that were discovere...
Modification of Field Equation and Natural Solution to cosmological problems
Background Coordinates Standard coordinates
2015/5/29
The present article has systematically solved the problem of galaxy formation and some significant cosmological puzzles. First a mistake with Einstein’s equation of gravitational field is corrected, n...
An Exact Solution of the Gamma Ray Burst Arrival Time Analysis Problem
Gamma Ray Bursts triangulation
2009/5/19
An analytical solution of the GRB arrival time analysis is
presented. The errors in the position of the GRB resulting from timing and
position errors of different satellites are calculated. A simple...
A FORTH-AND-BACK IMPLICIT Λ ITERATION IN THE SOLUTION OF RADIATIVE TRANSFER IN SPHERICAL MEDIA
Methods numerical-Radiative transfer-Stars atmospheres
2009/3/11
Forth-and-back implicit Λ-iteration has been developed to solve
radiative transfer (RT) problems with plane-parallel geometry in which there is a
coupling of all RT equations by the scattering term ...