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Compact Objects in Alternative Gravities

open access: yesUniverse, 2022
We address neutron stars and black holes in alternative gravities, after recalling their basic properties in General Relativity. Among the plethora of interesting alternative gravities we here focus on an interesting set of scalar-tensor theories.
Jose Luis Blázquez-Salcedo   +2 more
doaj   +1 more source

The most massive progenitors of neutron stars: CXO J164710.2-455216

open access: yes, 2008
The evolution leading to the formation of a neutron star in the very young Westerlund 1 star cluster is investigated. The turnoff mass has been estimated to be 35 Msun, indicating a cluster age ~ 3-5 Myr.
Ergma E.   +12 more
core   +1 more source

Bound Debris Expulsion from Neutron Star Merger Remnants

open access: yesThe Astrophysical Journal, 2023
Many studies have found that neutron star mergers leave a fraction of the stars’ mass in bound orbits surrounding the resulting massive neutron star or black hole. This mass is a site of r -process nucleosynthesis and can generate a wind that contributes
Yossef Zenati   +6 more
doaj   +1 more source

Contraction of cold neutron star due to in the presence a quark core

open access: yesEuropean Physical Journal C: Particles and Fields, 2019
Motivated by importance of the existence of quark matter on structure of neutron star. For this purpose, we use a suitable equation of state (EoS) which include three different parts: (i) a layer of hadronic matter, (ii) a mixed phase of quarks and ...
B. Eslam Panah   +2 more
doaj   +1 more source

RXJ1856.5-3754 and RXJ0720.4-3125 are P-Stars

open access: yes, 2004
P-stars are a new class of compact stars made of up and down quarks in $\beta$-equilibrium with electrons in a chromomagnetic condensate. P-stars are able to account for compact stars with $R \lesssim 6 Km$, as well as stars comparable to canonical ...
Cea, Paolo
core   +1 more source

Cooling of Neutron Stars

open access: yesEPJ Web of Conferences, 2010
We introduce the theoretical basis for modeling the cooling evolution of compact stars starting from Boltzmann equations in curved space-time. We open a discussion on observational verification of different neutron star models by consistent statistics ...
Grigorian H.
doaj   +1 more source

A holistic approach to carbon-enhanced metal-poor stars

open access: yes, 2009
By considering the various CEMP subclasses separately, we try to derive, from the specific signatures imprinted on the abundances, parameters (such as metallicity, mass, temperature, and neutron source) characterizing AGB nucleosynthesis from the ...
Goriely, S.   +6 more
core   +1 more source

Analysis of the Conformally Flat Approximation for Binary Neutron Star Initial Conditions

open access: yesAdvances in Astronomy, 2017
The spatially conformally flat approximation (CFA) is a viable method to deduce initial conditions for the subsequent evolution of binary neutron stars employing the full Einstein equations.
In-Saeng Suh   +3 more
doaj   +1 more source

Dynamical tides in neutron stars: the impact of the crust [PDF]

open access: hybrid, 2021
Andrea Passamonti   +2 more
openalex   +1 more source

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

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