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Born in the aftermath of core collapse supernovae, neutron stars contain matter under extraordinary conditions of density and temperature that are difficult to reproduce in the laboratory. In recent years, neutron star observations have…

Nuclear Theory · Physics 2021-05-27 C. Drischler , J. W. Holt , C. Wellenhofer

The equation of state (EOS) of dense matter in neutron stars (NSs) remains uncertain, particularly at supra-nuclear densities where complex nuclear interactions and the potential presence of exotic matter, like hyperons, come into play. The…

Nuclear Theory · Physics 2026-01-13 N. K. Patra , Tuhin Malik , Kai Zhou , Constança Providência

Understanding the properties of strongly interacting matter at extreme densities is a central problem in fundamental physics, but neutron star mergers provide a natural laboratory for probing this regime. However, the complexity of the…

High Energy Astrophysical Phenomena · Physics 2026-02-24 Nina Kunert , Guilherme Grams , William Newton , Edoardo Giangrandi , Anna Puecher , Hauke Koehn , Violetta Sagun , Tim Dietrich

The role of the symmetry energy and the neutron-matter stiffness on the tidal deformability of a cold nonaccreted neutron star is studied using a set of unified equations of state. Based on the nuclear energy-density functional theory,…

Nuclear Theory · Physics 2019-10-30 Loic Perot , Nicolas Chamel , Aurélien Sourie

One very promising technique for measuring the dense matter Equation of State exploits hotspots that form on the neutron star surface due to the pulsar mechanism, accretion streams, or during thermonuclear explosions in the neutron star…

High Energy Astrophysical Phenomena · Physics 2019-09-04 Anna L. Watts

We investigate theoretical and observational constraints on the mass-radius relations for neutron stars. For that purpose we consider the model of neutron stars taking into considerations strong, weak, electromagnetic and gravitational…

High Energy Astrophysical Phenomena · Physics 2016-06-28 Kuantay Boshkayev , Jorge A. Rueda , Marco Muccino

Motivated by the unknown nature of the $2.50-2.67\,M_\odot$ compact object in the binary merger event GW190814, we study the maximum neutron star mass based on constraints from low-energy nuclear physics, neutron star tidal deformabilities…

Nuclear Theory · Physics 2021-09-29 Yeunhwan Lim , Anirban Bhattacharya , Jeremy W. Holt , Debdeep Pati

In order to systematically examine the possible maximum mass of neutron stars, which is one of the important properties characterizing the physics in high-density region, I construct neutron star models by adopting phenomenological…

High Energy Astrophysical Phenomena · Physics 2017-03-08 Hajime Sotani

Recent observations of neutron-star properties, in particular the recent detection of gravitational waves emitted from binary neutron stars, GW 170817, open the way to put strong constraints on nuclear interactions. In this paper, we review…

Nuclear Theory · Physics 2019-09-25 S. Gandolfi , J. Lippuner , A. W. Steiner , I. Tews , X. Du , M. Al-Mamun

In this undergraduate project, f-mode oscillations in neutron stars are used to constrain the equation of state of dense matter. For the first time, a systematic investigation of the role of nuclear saturation parameters on the mode…

High Energy Astrophysical Phenomena · Physics 2021-08-12 Sukrit Jaiswal , Debarati Chatterjee

The detection of gravitational waves from a neutron star merger has opened up the possibility of detecting the presence or creation of deconfined quark matter using the gravitational wave signal. To investigate this possibility, we…

High Energy Astrophysical Phenomena · Physics 2019-10-02 Paul M. Chesler , Niko Jokela , Abraham Loeb , Aleksi Vuorinen

Set of neutron star observational results is used to test some selected equations of state of dense nuclear matter. The first observational result comes from the mass--baryon number relation for pulsar B of the double pulsar system J…

Solar and Stellar Astrophysics · Physics 2010-07-21 Martin Urbanec , Emil Betak , Zdenek Stuchlik

We present a first proof-of-principle study for using deep neural networks (DNNs) as a novel search method for continuous gravitational waves (CWs) from unknown spinning neutron stars. The sensitivity of current wide-parameter-space CW…

General Relativity and Quantum Cosmology · Physics 2019-09-09 Christoph Dreissigacker , Rahul Sharma , Chris Messenger , Ruining Zhao , Reinhard Prix

Over the last few years, the detection of gravitational waves from binary neutron star systems has rekindled our hopes for a deeper understanding of the unknown nature of ultradense matter. In particular, gravitational wave constraints on…

High Energy Astrophysical Phenomena · Physics 2022-08-18 P. Laskos-Patkos , P. S. Koliogiannis , A. Kanakis-Pegios , Ch. C. Moustakidis

Neutron stars offer a great opportunity to study highly compressed hadronic matter experimentally and theoretically. However, the so-called hyperon-puzzle arises at neutron star densities. The hyperon coexistence with other particles in…

Nuclear Theory · Physics 2024-02-14 A. Chorozidou , T. Gaitanos

One of the main challenges in modeling massive stars to the onset of core collapse is the computational bottleneck of nucleosynthesis during advanced burning stages. The number of isotopes formed requires solving a large set of…

Driven by recent laboratory experiments and astronomical observations, significant advances have deepened our understanding of neutron-star physics. NICER's Pulse Profile Modeling has refined our knowledge of neutron star masses and radii,…

Nuclear Theory · Physics 2024-11-07 Marc Salinas , Jorge Piekarewicz

Neutron stars provide unique conditions to study cold dense nuclear matter at extreme densities. Due to these extreme conditions additional hadronic degrees of freedom are expected to be populated,including hyperons. This talk will focus on…

Nuclear Theory · Physics 2022-08-29 Wazha German , Dr Jacobus Diener

Gravitational Waves (GWs) from coalescing binaries carry crucial information about their component sources, like mass, spin and tidal effects. This implies that the analysis of GW signals from binary neutron star mergers can offer unique…

High Energy Astrophysical Phenomena · Physics 2024-01-17 Shriya Soma , Horst Stöcker , Kai Zhou

Observations have indicated that we do not see neutron stars (NS) of mass near the theoretical upper limit as predicted. Here we invoke the role of dark matter (DM) particles in star formation, and their role in lowering the mass of…

High Energy Astrophysical Phenomena · Physics 2019-02-26 Sandeep Kumar S , Kenath Arun , C Sivaram
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