Results 51 to 60 of about 41,225 (263)

QUARK-CLUSTER STARS: THE STRUCTURE [PDF]

open access: yesInternational Journal of Modern Physics: Conference Series, 2013
The nature of pulsar-like compact stars is still in controversy although the first pulsar was found more than 40 years ago. Generally speaking, conventional neutron stars and non-mainstream quark stars are two types of models to describe the inner structure of pulsars, with the former composed mainly of hadrons and the latter of a peculiar kind of ...
Renxin Xu, Xiaoyu Lai
openaire   +3 more sources

The Hadron-quark Crossover in Neutron Star within Gaussian Process Regression Method

open access: yesThe Astrophysical Journal, 2022
The equations of state of the neutron star at the hadron-quark crossover region are interpolated with the Gaussian process regression (GPR) method, which can reduce the randomness of present interpolation schemes.
Kaixuan Huang   +3 more
doaj   +1 more source

Constant entropy hybrid stars: a first approximation of cooling evolution [PDF]

open access: yes, 2017
We aim to study the possibility of a hadron-quark phase transition in the interior of neutron stars, taking into account different schematic evolutionary stages at finite temperature. We also discuss the strange quark matter stability in the quark matter
Mariani, M., Orsaria, M., Vucetich, H.
core   +3 more sources

Quark matter in compact stars? [PDF]

open access: yesNature, 2007
Ozel, in a recent reanalysis of EXO 0748-676 observational data (astro-ph/0605106), concluded that quark matter probably does not exist in the center of compact stars. We show that the data is actually consistent with the presence of quark matter in compact stars.
Thomas Klähn   +6 more
openaire   +4 more sources

Quark phases in neutron stars and a "third family" of compact stars as a signature for phase transitions [PDF]

open access: yes, 2000
The appearance of quark phases in the dense interior of neutron stars provides one possibility to soften the equation of state (EOS) of neutron star matter at high densities.
Akmal   +76 more
core   +2 more sources

Strange Quark Stars — A Review [PDF]

open access: yesSymposium - International Astronomical Union, 2003
A pedagogical overview of strange quark matter and strange stars is presented. After a historical notation of the research and an introduction to quark matter, a major part is devoted to the physics and astrophysics of strange stars, with attention being paid to the possible ways by which neutron stars and strange stars can be distinguished in ...
openaire   +3 more sources

Electrical neutrality and $$\beta $$ β -equilibrium conditions in dense quark matter: generation of charged pion condensation by chiral imbalance

open access: yesEuropean Physical Journal C: Particles and Fields, 2020
The phase diagram of dense quark matter with chiral imbalance is considered with the conditions of electric neutrality and $$\beta $$ β -equilibrium. It has been shown recently that chiral imbalance can generate charged pion condensation (PC) in dense ...
T. G. Khunjua   +2 more
doaj   +1 more source

Binary Neutron-Star Mergers with a Crossover Transition to Quark Matter

open access: yesUniverse, 2023
This paper summarizes recent work on the possible gravitational-wave signal from binary neutron-star mergers in which there is a crossover transition to quark matter.
Grant J. Mathews   +3 more
doaj   +1 more source

Thermal Evolution and Light Curves of Young Bare Strange Stars [PDF]

open access: yes, 2002
The cooling of a young bare strange star is studied numerically by solving the equations of energy conservation and heat transport for both normal and superconducting strange quark matter inside the star.
Ch. Schaab   +14 more
core   +2 more sources

Quark-Novae in massive binaries : a model for double-humped, hydrogen-poor, superluminous Supernovae

open access: yes, 2015
LSQ14bdq and SN 2006oz are super-luminous, hydrogen-poor, SNe with double-humped light curves. We show that a Quark-Nova (QN; explosive transition of the neutron star to a quark star) occurring in a massive binary, experiencing two Common Envelope (CE ...
Koning, Nico   +2 more
core   +1 more source

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