scholarly journals A two-dimensional dark energy star model at finite temperature

2008 ◽  
Vol 57 (7) ◽  
pp. 3978
Author(s):  
Deng Qiang ◽  
Yan Jun
Keyword(s):  
Dark Energy ◽  
Finite Temperature ◽  
Two Dimensional ◽  
Star Model ◽  
Energy Star

A sine-Gordon soliton star model with a mix of dark energy and Fermi matter 1Project Supported by Natural Science Foundation of Sichuan Education Committee under Grant No.11ZA100.

2012 ◽  
Vol 90 (12) ◽  
pp. 1279-1285 ◽  
Author(s):  
Wen-Jie Su ◽  
Jun Yan
Keyword(s):  
Dark Energy ◽  
Scalar Field ◽  
Coupling Coefficient ◽  
Natural Science ◽  
Phase Structure ◽  
Two Dimensional ◽  
Star Model ◽  
Matter Coupling ◽  
Soliton State ◽  
The Stability

A sine-Gordon soliton star model with a mix of dark energy and Fermi matter is studied in the two-dimensional Brans–Dicke gravity model. The phase structure is analysed for a strong-coupling Thirring model. Subsequently, a soliton star model with cool Fermi matter coupling is constructed. We found that the soliton state and the mass of a star can change the density and pressure of matter at certain temperatures. Moreover, the stability of dark energy in the center of a star is proved when the coupling coefficient of the scalar field and Fermi matter satisfies some constraint conditions.

scholarly journals Anisotropic charged dark energy star

2014 ◽  
Vol 356 (1) ◽  
pp. 57-66 ◽  
Author(s):  
Kanika Das ◽  
Nawsad Ali
Keyword(s):  
Dark Energy ◽  
Energy Star

scholarly journals Fermi Degenerate Antineutrino Star Model of Dark Energy

2020 ◽  
Vol 2020 ◽  
pp. 1-11 ◽  
Author(s):  
Tom F. Neiser
Keyword(s):  
Dark Energy ◽  
Energy Density ◽  
Background Radiation ◽  
Mass Density ◽  
High Energy ◽  
Big Bang ◽  
Gravitational Mass ◽  
High Energy Density ◽  
Star Model ◽  
Λcdm Model

When the Large Hadron Collider resumes operations in 2021, several experiments will directly measure the motion of antihydrogen in free fall for the first time. Our current understanding of the universe is not yet fully prepared for the possibility that antimatter has negative gravitational mass. This paper proposes a model of cosmology, where the state of high energy density of the big bang is created by the collapse of an antineutrino star that has exceeded its Chandrasekhar limit. To allow the first neutrino stars and antineutrino stars to form naturally from an initial quantum vacuum state, it helps to assume that antimatter has negative gravitational mass. This assumption may also be helpful to identify dark energy. The degenerate remnant of an antineutrino star can today have an average mass density that is similar to the dark energy density of the ΛCDM model. When in hydrostatic equilibrium, this antineutrino star remnant can emit isothermal cosmic microwave background radiation and accelerate matter radially. This model and the ΛCDM model are in similar quantitative agreement with supernova distance measurements. Therefore, this model is useful as a purely academic exercise and as preparation for possible future discoveries.

scholarly journals MAGNETIC INSTABILITY IN A PARITY INVARIANT TWO-DIMENSIONAL FERMION SYSTEM

2000 ◽  
Vol 14 (14) ◽  
pp. 1441-1449 ◽  
Author(s):  
M. ELIASHVILI ◽  
G. TSITSISHVILI
Keyword(s):  
High Temperature ◽  
Temperature Regime ◽  
Ground State ◽  
Finite Temperature ◽  
Two Dimensional ◽  
Fermion System ◽  
Temperature Analysis ◽  
Magnetic Instability ◽  
High Temperature Regime

We consider the parity invariant QED2+1 where the matter is represented as a mixture of fermions with opposite spins. It is argued that the perturbative ground state of the system is unstable with respect to the formation of magnetized ground state. Carrying out the finite temperature analysis we show that the magnetic instability disappears in the high temperature regime.

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