Results 61 to 70 of about 42,461 (272)

Quark neutron layer stars

open access: yesThe Astrophysical Journal, 1993
Typical nuclear equations of state and a quark bag model, surprisingly, allow compact stars with alternate layers of neutrons and quarks. One can determine on the basis of the Gibbs free energy which phase, nuclear or quark, is energetically favorable.
openaire   +2 more sources

From quark drops to quark stars [PDF]

open access: yesThe European Physical Journal A, 2016
We review some recent results about the mechanism of deconfinement of hadronic matter into quark matter in cold neutron stars and protoneutron stars. We discuss the role of finite size effects and the relevance of temperature and density fluctuations on the nucleation process. We also examine the importance of surface effects for mixed phases in hybrid
openaire   +2 more sources

Disproportional ventilatory response to incremental exercise in individuals with cerebral palsy

open access: yesDevelopmental Medicine &Child Neurology, EarlyView.
Individuals with cerebral palsy demonstrate a disproportionate ventilatory response during incremental exercise. Compared with typically developing peers, respiratory frequency increases earlier and at comparable exercise intensities, contributing to higher perceived exertion and reduced ventilatory efficiency. At task failure, respiratory frequency is
Linnéa Corell   +14 more
wiley   +1 more source

Radioactivity of quark nuggets

open access: yesJournal of High Energy Physics
Quark nuggets Q Z A $$ {}_{\textrm{Z}}{}^{\textrm{A}}\textrm{Q} $$ , as Fermionic non-topological solitons, could have their mass per baryon smaller than ordinary nuclei and behave as exotic nuclei with different relations of atomic number and atomic ...
Yang Bai, Mrunal Korwar
doaj   +1 more source

How a quark-gluon plasma phase modifies the bounds on extra dimensions from SN 1987a [PDF]

open access: yes, 2001
The shape of the neutrino pulse from the supernova SN1987a provides one of the most stringent constraints on the size of large, compact, "gravity-only" extra dimensions.
Arndt, Daniel
core   +3 more sources

Constraints on the maximum mass of quark star and the GW 190814 event [PDF]

open access: diamond, 2022
Takol Tangphati   +3 more
openalex   +1 more source

QUARK MATTER IN MASSIVE COMPACT STARS [PDF]

open access: yesThe Astrophysical Journal, 2011
The recent observation of the pulsar PSR J1614-2230 with a mass of 1.97 +/- 0.04 M_sun gives a strong constraint on the quark and nuclear matter equations of state (EoS). We explore the parameter ranges for a parameterized EoS for quark stars. We find that strange stars, made of absolutely stable strange quark matter, comply with the new constraint ...
S. Weissenborn   +4 more
openaire   +3 more sources

Metformin attenuates metabolic insulin sensitivity and insulin‐stimulated carbohydrate oxidation after high‐intensity exercise training in adults at risk for metabolic syndrome

open access: yesDiabetes, Obesity and Metabolism, EarlyView.
Abstract Aims Mixed evidence exists on whether metformin adds to or attenuates the insulin‐sensitising effects of exercise. To date, no studies have tested whether metformin differentially impacts exercise training intensity–mediated insulin sensitivity.
Steven K. Malin   +7 more
wiley   +1 more source

The mixed phase quark core in massive hybrid stars

open access: yesEuropean Physical Journal C: Particles and Fields
We investigate the properties of hybrid star and the mixed phase core to explore the radius ratio of the mixed phase in hybrid star. In the context of observed massive neutron stars (NSs), we examine the internal structure, phase transitions, and the ...
Xuhao Wu, Peng-Cheng Chu, Min Ju, He Liu
doaj   +1 more source

Quark-Nova Explosion inside a Collapsar: Application to Gamma Ray Bursts

open access: yesAdvances in Astronomy, 2009
If a quark-nova occurs inside a collapsar, the interaction between the quark-nova ejecta (relativistic iron-rich chunks) and the collapsar envelope leads to features indicative of those observed in Gamma Ray Bursts.
Rachid Ouyed   +3 more
doaj   +1 more source

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