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On the Fifth Force and the Structure of Neutron Star [PDF]

open access: yesJournal of Astronomy and Space Sciences, 1994
In the framework of Thomas-Fermi equation, we have examined the properties of neutron star by assuming the existence of a new intermediate force which is composition dependent.
D. J. Song, H. S. Lee
doaj  

Probing neutron star physics using accreting neutron stars

open access: yesEPJ Web of Conferences, 2010
We give an obervational overview of the accreting neutron stars systems as probes of neutron star physics. In particular we focus on the results obtained from the periodic timing of accreting millisecond X-ray pulsars in outburst and from the ...
Patruno A.
doaj   +1 more source

Neutron Stars and Dark Matter

open access: yesUniverse, 2020
Neutron stars change their structure with accumulation of dark matter. We study how their mass is influenced from the environment. Close to the sun, the dark matter accretion from the neutron star does not have any effect on it.
Antonino Del Popolo   +2 more
doaj   +1 more source

GW230529: unveiling the hidden realm of the anisotropic neutron stars in the lower mass gap with gravitational wave echoes

open access: yesEuropean Physical Journal C: Particles and Fields
Recent discovery of a compact binary coalescence through GW230529 by LIGO has indicated the merger event of a compact object of mass between $$2.5{-}4.5~M_{\odot }$$ 2.5 - 4.5 M ⊙ with a neutron star of mass between $$1.2{-}2.0~M_{\odot }$$ 1.2 - 2.0 M ⊙
Mayukh Bandyopadhyay
doaj   +1 more source

Constraining the Dense Matter Equation of State with New NICER Mass–Radius Measurements and New Chiral Effective Field Theory Inputs

open access: yesThe Astrophysical Journal Letters
Pulse profile modeling of X-ray data from the Neutron Star Interior Composition Explorer is now enabling precision inference of neutron star mass and radius.
Nathan Rutherford   +14 more
doaj   +1 more source

Role of strangeness to the neutron star mass and cooling

open access: yesEPJ Web of Conferences, 2018
Neutron star provides unique environments for the investigation of the physics of extreme dense matter beyond normal nuclear saturation density. In such high density environments, hadrons with strange quarks are expected to play very important role in ...
Lee Chang-Hwan   +3 more
doaj   +1 more source

The compact neutron star in 4U 1746-37 revisited: Reassessing the mass and radius

open access: yesAstronomy & Astrophysics
Context. A recent analysis of photospheric radius expansion X-ray bursts from the low-mass X-ray binary 4U 1746-37 reported unusually small mass and radius estimates for the neutron star, suggesting it could be a quark star or quark-cluster star.
Sung Kwang Hyun   +4 more
doaj   +1 more source

Constraints on Microscopic and Phenomenological Equations of State of Dense Matter from GW170817

open access: yesUniverse, 2019
We discuss the constraints on the equation of state (EOS) of neutron star matter obtained by the data analysis of the neutron star-neutron star merger in the event GW170807.
Domenico Logoteta, Ignazio Bombaci
doaj   +1 more source

Hyperneutron Stars from an Ab Initio Calculation

open access: yesThe Astrophysical Journal
The equation of state (EOS) of neutron matter plays a decisive role in understanding the neutron star properties and the gravitational waves from neutron star mergers. At sufficient densities, the appearance of hyperons generally softens the EOS, leading
Hui Tong   +2 more
doaj   +1 more source

Magnetar QPOs and Neutron Star Crust Elasticity

open access: yesUniverse
The crust region is a tiny fraction of neutron stars, but it has a variety of physical properties and plays an important role in astronomical observations. One of the properties characterizing the crust is elasticity. In this review, with the approach of
Hajime Sotani
doaj   +1 more source

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