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Project List » Multifaceted Approach to the Physics of Neutron Stars |
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Multifaceted Approach to the Physics of Neutron Stars
www.nipne.ro/proiecte/pn4/9-projects.html
Acronym: MAP-NS
Contracting Authority: Executive Agency for Higher Education, Research, Development and Innovation Funding (UEFISCDI)
Number / Date of the contract: 20PCE / 2025-08-01
Program: PN-IV-P1-PCE-2023-0324
Project Manager: Mikhail Beznogov
Partners:
Starting date / finishing date: 2025-08-01 / 2027-12-31
Project value: 1 199 437 RONAbstract: The goal of our project is to advance the knowledge of neutron stars (NSs) and, implicitly, of cold superdense matter. Several subtle aspects of thermal evolution and time-dependent structure of NSs will be investigated in this threefold study. (I) The equation of state (EOS) and composition of cold catalyzed matter will be analyzed by means of Bayesian inference techniques. Different phenomenological nuclear physics frameworks and state of the art constraints from microphysics and astrophysical observations will be employed. (II) We will examine the role some of the so far disregarded semi-leptonic and non-leptonic reactions involving exotic particle degrees of freedom has on the mechanical and thermal evolution of isolated spinning down NSs. Several heavy baryons and mesons are expected to be populated in the cores of NSs and participate in weak interaction reactions that act as sinks and sources of heat. Accounting for such processes can help to explain some of the observational data on old and relatively warm isolated NSs. (III) New finite temperature crust EOSs will be constructed taking into account the very recent concept of the diffusion equilibrium of unbound neutrons. These new crust EOSs will be further employed to study the crust formation and crystallization in neo-NSs. These results will serve as a basis for researches of partially and/or fully accreted crusts of NSs in low mass X-ray transients.
Objectives: 1. Bayesian inference of dense matter equation of state
2. Rotochemical heating in neutron stars
3. Crust formation in neo-neutron stars.
THE STAGES OF THE PROJECT AND DELIVERY DATES
1. Bayesian inference of dense matter equation of state (2025-12-31)
2. Rotochemical heating in neutron stars (2026-12-31)
3. Crust formation in neo-neutron stars (2027-12-31)
RESULTS [Project Activity Report]
PUBLISHED ARTICLES
RESEARCH TEAM
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