Results 91 to 100 of about 41,644 (263)

Stars and quark stars in bumblebee gravity

Annals of Physics
In this work, the interior spacetime of stars is built in a Lorentz symmetry breaking model called bumblebee gravity. Firstly, we calculated the modified Tolman-Oppenheimer-Volkoff equation in this context of modified gravity. Then we show that the bumblebee field, responsible for the symmetry breaking, increases the star mass-radius relation when it ...
Juliano C.S. Neves, Fernando G. Gardim
openaire   +2 more sources

A new method for non‐invasive determination of effective pulmonary blood flow and cardiac output in spontaneously breathing subjects

Experimental Physiology, EarlyView.
Abstract The differential Fick method is well established for measuring effective pulmonary blood flow (EPBF) and cardiac output (CO) but until now it has only been used for patients on mechanical ventilation. Here we present and evaluate a new approach adapted to spontaneous breathing situations.
Andras Gedeon, Jakob Jansson, David Patrickson, Mats Wallin   +3 more
wiley   +1 more source

Quark matter and quark stars in strong magnetic fields at finite temperature within the confined-isospin-density-dependent mass model

Physics Letters B, 2018
We study the properties of strange quark matter (SQM) and quark stars (QSs) in strong magnetic fields within the extended confined isospin-density-dependent mass (CIDDM) model including the temperature dependence of the equivalent mass for quarks.
Peng-Cheng Chu, Xiao-Hua Li, Hong-Yang Ma, Bin Wang, Yu-Min Dong, Xiao-Min Zhang   +5 more
doaj   +1 more source

PSR B1257+12: a quark star with planets?

, 2007
A recent observation has shown that PSR B1257+12 could have quite small X-ray emitting area, only about 2000 m$^2$, which is more than three orders smaller than the canonical polar cap size.
Xu, Renxin, Yue, Youling
core   +1 more source

PROPERTIES OF MAGNETIZED QUARK-HYBRID STARS [PDF]

International Journal of Modern Physics E, 2011
The structure of a magnetized quark-hybrid stars (QHS) is modeled using a standard relativistic mean-field equation of state (EoS) for the description of hadronic matter. For quark matter we consider a bag model EoS which is modified perturbatively to account for the presence of a uniform magnetic field.
Milva Orsaria, Fridolin Weber, Héctor Vucetich, Ignacio F. Ranea-Sandoval, Ignacio F. Ranea-Sandoval   +4 more
openaire   +5 more sources

A new method for bedside determination of effective lung volume and functional residual capacity

Experimental Physiology, EarlyView.
Abstract Established methods of measuring functional residual capacity (FRC) involve sophisticated equipment and elaborate procedures. Here we present a new method based on CO2 rebreathing that has a simple fast procedure and only requires end‐tidal CO2 monitoring. Ten healthy subjects with diverse anthropometric and respiratory parameters were studied
Andras Gedeon, Jakob Jansson, David Patrickson, Mats Wallin   +3 more
wiley   +1 more source

Exploring the spin structure of the nucleon at STAR [PDF]

EPJ Web of Conferences
Understanding the internal spin structure of the nucleon remains a challenge in strong interaction physics. The unique capability of RHIC opened new avenues in studying the internal structure of the proton with unprecedented depth and precision ...
Lin Ting
doaj   +1 more source

SGR 0418+5729 as an evolved Quark-Nova compact remnant

, 2011
Soft gamma repeaters and anomalous X-ray pulsars are believed to be magnetars, i.e. neutron stars powered by extreme magnetic fields, B~10^(14)-10^(15) Gauss.
Arnaud, Esposito, Göğüş, Iwazaki, Kallman, Kaspi, Keränen, Lyutikov, Makishima, Niebergal, Niebergal, Ouyed, Ouyed, Ouyed, Ouyed, Ouyed, Ouyed, Ouyed, Rea, Rengarajan, Thompson, van der Horst, Vogt   +22 more
core   +1 more source

Acute ketone monoester ingestion lowers resting cerebral blood flow: a randomized cross‐over trial

The Journal of Physiology, EarlyView.
Abstract figure legend This double‐blind, placebo‐controlled, randomized cross‐over trial investigated the effects of ketone monoester (KME) ingestion on resting cerebral blood flow (CBF) in young adults. We demonstrate that KME supplementation lowers CBF in a dose‐dependent manner over 2‐houra post‐ingestion, whereas CBF remained unchanged following ...
Aedan J. Rourke, Claudia M.S. Yong, Geoff B. Coombs, Addriana R. Odisho, Jenna A. Nash, Jack Bone, Baraa K. Al‐Khazraji, Jeremy J. Walsh   +7 more
wiley   +1 more source

Proto-strange quark stars from density-dependent quark mass model

European Physical Journal C: Particles and Fields
In this paper, we investigate the evolution of strange quark stars (SQS) from birth as proto-strange quark stars to maturity as stable SQSs at a zero temperature.
Adamu Issifu, Franciele M. da Silva, Débora P. Menezes   +2 more
doaj   +1 more source