Results 71 to 80 of about 1,078 (229)

Quark stars: features and findings [PDF]

The European Physical Journal C, 2006
Under extreme conditions of temperature and/or density, quarks and gluons are expected to undergo a deconfinement phase transition. While this is an ephemeral phenomenon at the ultra-relativistic heavy-ion collider (BNL-RHIC), quark matter may exist naturally in the dense interior of neutron stars.
openaire   +2 more sources

A Relativistic Model for Strange Quark Star [PDF]

International Journal of Theoretical Physics, 2013
We propose a spherically symmetric and anisotropic model for strange quark stars within the framework of MIT Bag model. Though the model is found to comply with all the physical requirements of a realistic star satisfying a strange matter equation of state (EOS), the estimated values the Bag constant for different strange star candidates like Her X-1 ...
Kalam, Mehedi, Usmani, Anisul Ain, Rahaman, Farook, Hossein, S. Monowar, Karar, Indrani, Sharma, Ranjan   +5 more
openaire   +3 more sources

Radioactivity of quark nuggets

Journal 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

On the Naturalistic Grounds of Grounding

Ratio, EarlyView.
ABSTRACT This paper examines whether grounding can be naturalized. We adopt a tripartite framework—Ocat (scientific catalogue of existents), Otyp (ontological types), and metaphysics (natures/modal profiles)—and show that classifying as such the relata of putative grounding claims forces a dilemma.
Raoni Arroyo, Jonas R. Becker Arenhart
wiley   +1 more source

Holographic Quark Matter and Neutron Stars [PDF]

Physical Review Letters, 2016
We use a top-down holographic model for strongly interacting quark matter to study the properties of neutron stars. When the corresponding Equation of State (EoS) is matched with state-of-the-art results for dense nuclear matter, we consistently observe a first order phase transition at densities between two and seven times the nuclear saturation ...
Hoyos, Carlos, Fernández, David Rodríguez, Jokela, Niko, Vuorinen, Aleksi   +3 more
openaire   +3 more sources

The mixed phase quark core in massive hybrid stars

European 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

Cerebral oxygen extraction across different exercise intensities: Role of arterial PCO2${P_{{\mathrm{C}}{{\mathrm{O}}_2}}}$

Experimental Physiology, EarlyView.
Abstract Stability in cerebral oxygen extraction fraction (OEF) is typically determined by alterations in cerebral blood flow (CBF). At rest, arterial partial pressure of carbon dioxide (PaCO2${P_{{\mathrm{aC}}{{\mathrm{O}}_2}}}$) and OEF exhibit a strong inverse relationship owing to the powerful influence of PaCO2${P_{{\mathrm{aC}}{{\mathrm{O}}_2}}}$
L. Madden Brewster, Travis Dylan Gibbons, Hannah Grace Caldwell, Connor A. Howe, Jennifer S. Duffy, Andrew R. Steele, Justin A. Monteleone, Jay M. J. R. Carr, Jodie Lauren Koep, Tenasia D. R. Monaghan, David B. MacLeod, Philip N. Ainslie   +11 more
wiley   +1 more source

An Investigation of Quark Star Dynamics and the Equation of State [PDF]

, 2019
Title: An Investigation of Quark Star Dynamics Author: David Suarez Under the supervision of Dr. Keith Andrew and the WKU Dept. of Physics and Astronomy.
Suarez, David, Andrew, Keith
core  

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

Advances 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, Denis Leahy, Jan Staff, Brian Niebergal   +3 more
doaj   +1 more source

Sex differences in the prefrontal cortex and muscle oxygenation during exercise until exhaustion in endurance‐trained individuals

Experimental Physiology, EarlyView.
Abstract figure legend During cardiopulmonary exercise testing, the decline in oxygenation in the prefrontal cortex of women is striking. This crucial brain area is directly involved in planning motor tasks. The decline is particularly pronounced at higher exercise intensities, especially after reaching the respiratory compensation point or anaerobic ...
Daniel Ramos‐López, Raúl Caulier‐Cisterna, Benjamín Díaz‐Ortiz, Cristóbal Baumann‐Biancani, Kamilo Hunger‐Abbott, Matías Herrera‐Matas, Andrés Vega‐Moraga, Vitor A. Lira, Maximiliano Espinosa‐Ramírez, Karol Ramírez‐Parada, Luigi Gabrielli‐Nervi, Hugo E. Verdejo, Felipe Contreras‐Briceño   +12 more
wiley   +1 more source