Quark matter and quark stars in a quasiparticle model

2021 ◽  
Vol 103 (10) ◽  
Author(s):  
Zhen Zhang ◽  
Peng-Cheng Chu ◽  
Xiao-Hua Li ◽  
He Liu ◽  
Xiao-Min Zhang
Keyword(s):  
Quark Matter ◽  
Quark Stars ◽  
Quasiparticle Model

Quark matter and quark stars within the quasiparticle model under magnetic fields

2021 ◽  
Vol 104 (4) ◽  
Author(s):  
Peng-Cheng Chu ◽  
Xiao-Hua Li ◽  
He Liu ◽  
Jia-Wei Zhang
Keyword(s):  
Magnetic Fields ◽  
Quark Matter ◽  
Quark Stars ◽  
Quasiparticle Model

scholarly journals Quark star matter at finite temperature in a quasiparticle model

2021 ◽  
Vol 81 (7) ◽  
Author(s):  
Peng-Cheng Chu ◽  
Yao-Yao Jiang ◽  
He Liu ◽  
Zhen Zhang ◽  
Xiao-Min Zhang ◽  
...  
Keyword(s):  
Quark Matter ◽  
Strange Quark ◽  
Large Mass ◽  
Compact Stars ◽  
Heating Process ◽  
Maximum Mass ◽  
Quark Stars ◽  
Star Evolution ◽  
Quasiparticle Model ◽  
Effects Of Temperature

AbstractWe study the thermodynamic properties of asymmetric quark matter, large mass quark stars (QSs), and proto-quark stars (PQSs) within the quasiparticle model. Considering the effects of temperature within quasiparticle model can significantly influence the EOS and the entropy of strange quark matter (SQM), quark fractions in SQM, as well as the tidal deformability and the maximum mass of PQSs along the star evolution line. Our results indicate that the recent discovered heavy compact stars PSR J0348+0432, MSR J0740+6620, PSR J2215+5135, and especially the GW190814’s secondary component $$m_2$$ m 2 can be well described as QSs within the quasiparticle model. The tidal deformability for the QSs describing the heavy compact stars is extremely large, which can not well describe GW170817 as QSs, and the effects of the temperature in the heating process along the star evolution will further increase the tidal deformability and the maximum mass of PQSs.

Strange Quark Matter as Dark Matter

2019 ◽  
Vol 22 (4) ◽  
pp. 311-317
Author(s):  
Hidezumi Terazawa
Keyword(s):  
Dark Matter ◽  
Quark Matter ◽  
Strange Quark ◽  
Strange Quark Matter ◽  
Quark Stars

New forms of matter such as super-hypernuclei (strange quark matter) and superhypernuclear stars (strange quark stars) as candidates for dark matter are discussed in some detail, based on the so-called "Bodmer–Terazawa–Witten hypothesis" assuming that they are stable absolutely or quasi-stable (decaying only weakly).

scholarly journals Gluon condensates, quark matter equation of state and quark stars

1994 ◽  
Vol 63 (4) ◽  
pp. 681-688 ◽  
Author(s):  
A. Mishra ◽  
H. Mishra ◽  
P. K. Panda ◽  
S. P. Misra
Keyword(s):  
Equation Of State ◽  
Quark Matter ◽  
Quark Stars ◽  
Gluon Condensates

Quark matter in the perturbation QCD model with a rapidly convergent matching-invariant running coupling

2017 ◽  
Vol 26 (06) ◽  
pp. 1750034 ◽  
Author(s):  
Jian-Feng Xu ◽  
Yan-An Luo ◽  
Lei Li ◽  
Guang-Xiong Peng
Keyword(s):  
Perturbation Theory ◽  
Infinite Number ◽  
Quark Matter ◽  
Chemical Potential ◽  
Maximum Mass ◽  
Solar Mass ◽  
Quark Stars ◽  
Dense Quark Matter ◽  
Subtraction Point ◽  
Running Coupling

The properties of dense quark matter are investigated in the perturbation theory with a rapidly convergent matching-invariant running coupling. The fast convergence is mainly due to the resummation of an infinite number of known logarithmic terms in a compact form. The only parameter in this model, the ratio of the renormalization subtraction point to the chemical potential, is restricted to be about 2.64 according to the Witten–Bodmer conjecture, which gives the maximum mass and the biggest radius of quark stars to be, respectively, two times the solar mass and 11.7[Formula: see text]km.

scholarly journals QUARK STARS ADMITTING A ONE-PARAMETER GROUP OF CONFORMAL MOTIONS

2004 ◽  
Vol 13 (01) ◽  
pp. 149-156 ◽  
Author(s):  
M. K. MAK ◽  
T. HARKO
Keyword(s):  
Analytical Solution ◽  
Quark Matter ◽  
Spherical Symmetry ◽  
Total Mass ◽  
Strange Quark ◽  
Exact Analytical Solution ◽  
Quark Star ◽  
Parameter Group ◽  
Quark Stars

An exact analytical solution describing the interior of a charged strange quark star is found under the assumption of spherical symmetry and the existence of a one-parameter group of conformal motions. The solution describes a unique static charged configuration of quark matter with radius R=9.46 km and total mass M=2.86M⊙.

STABILITY OF QUARK MATTER AND QUARK STARS

2003 ◽  
Author(s):  
M. FIOLHAIS ◽  
M. MALHEIRO ◽  
A. R. TAURINES
Keyword(s):  
Quark Matter ◽  
Quark Stars

Isospin properties in quark matter and quark stars within isospin-dependent quark mass models

2019 ◽  
Vol 99 (3) ◽  
Author(s):  
Peng-Cheng Chu ◽  
Yi Zhou ◽  
Xin Qi ◽  
Xiao-Hua Li ◽  
Zhen Zhang ◽  
...  
Keyword(s):  
Quark Matter ◽  
Quark Mass ◽  
Quark Stars

scholarly journals Stable Up-Down Quark Matter Nuggets, Quark Star Crusts, and a New Family of White Dwarfs

Galaxies ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 70
Author(s):  
Lang Wang ◽  
Jian Hu ◽  
Cheng-Jun Xia ◽  
Jian-Feng Xu ◽  
Guang-Xiong Peng ◽  
...  
Keyword(s):  
Quark Matter ◽  
White Dwarfs ◽  
Maximum Mass ◽  
Quark Star ◽  
Small Surface ◽  
New Family ◽  
Quark Stars ◽  
Down Quark ◽  
The Stability ◽  
Chandrasekhar Limit

The possible existence of stable up-down quark matter (udQM) was recently proposed, and it was shown that the properties of udQM stars are consistent with various pulsar observations. In this work we investigate the stability of udQM nuggets and found at certain size those objects are more stable than others if a large symmetry energy and a small surface tension were adopted. In such cases, a crust made of udQM nuggets exists in quark stars. A new family of white dwarfs comprised entirely of udQM nuggets and electrons were also obtained, where the maximum mass approaches to the Chandrasekhar limit.

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