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Bao-Jun Cai (Fudan University)21/08/2026, 14:00Compact starstalk (15min)
Understanding the equation of state (EOS) of dense matter inside neutron stars remains an important topic in modern nuclear physics and astrophysics. Recent multimessenger observations, especially gravitational-wave measurements from binary neutron-star mergers, together with X-ray timing and radio pulsar observations, have opened new opportunities for probing matter at supranuclear densities....
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Jorinde van de Vis (CERN)21/08/2026, 14:15Compact starstalk (30min)
Tentative evidence suggests that the cores of massive neutron stars consist of deconfined quark matter. In this talk, I argue that the formation of such a quark matter core during a galactic supernova could be accompanied by the emission of gravitational waves in the MHz band, and I discuss the computation of the signal. Gravitational wave signals from phase transitions in supernovae...
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Steven Harris (Iowa State University)21/08/2026, 14:45Compact starstalk (15min)
As the weak interaction involves only left-handed electrons, beta-equilibration in neutron stars can generate an imbalance between left- and right-handed electrons. This imbalance is counteracted by chirality-flipping Coulomb scattering of the electrons, which occurs in proportion to the mass of the electron. When two neutron stars collide, matter is pushed far out of beta equilibrium and...
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Lorenzo Bartolini (TU Wien)21/08/2026, 15:00Compact starstalk (15min)
The equation of state of dense nuclear matter remains one of the main uncertainties in modelling neutron star interiors. Holographic QCD provides a useful strongly coupled framework for this problem, but descriptions based on homogeneous baryonic matter generally lead to equations of state that are too stiff and struggle to reproduce realistic nuclear matter properties around saturation. In...
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Saga Säppi (ICE-CSIC & IEEC)21/08/2026, 15:15Compact starstalk (15min)
Observations of neutron star collisions have brought about a plethora of ways to access novel properties of compact stars. Amongst them are transport phenomena: The dynamic nature of a neutron star collision probes the transport properties of extremely dense matter. Bulk viscosity is of particular importance, and is thought to leave an imprint on the gravitational wave signal emanating from...
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Ishfaq Ahmad Rather (ITP, Goethe University)21/08/2026, 15:30Compact starstalk (15min)
We investigate the impact of a stiff dark matter equation of state (EoS) on the structure and stability of neutron stars. For dark matter, we use bosonic, self-interacting scalar fields that generate ultra-compact boson stars with compactness exceeding 1/3. Varying the dark matter particle mass and stiffness shifts stellar configurations across distinct regions of the mass–radius diagram,...
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Sarah Louisa Pitz (Goethe University Frankfurt am Main)21/08/2026, 15:45Compact starstalk (15min)
As the number of unexplained mass–radius measurements of compact objects in the neutron star regime grows, systematically comparing scenarios beyond standard neutron star — i.e., assuming strongly interacting matter and general relativity — becomes increasingly important. In this work, we perform a Bayesian analysis of different scenarios capable of explaining current and future measurements...
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