Asteroseismology using quadrupolar -modes revisited: Breaking of universal relationships in the slow hadron-quark conversion scenario

IF Ranea-Sandoval, M Mariani, MO Celi… - Physical Review D, 2023 - APS
In this work, we consider polar perturbations, and we calculate the frequency and dam**
time of the quadrupolar fundamental f-mode of compact objects, constructed using a wide …

Universal relations for compact stars with exotic degrees of freedom

A Kumar, MK Ghosh, P Thakur, VB Thapa… - The European Physical …, 2024 - Springer
The nature of the highly dense matter inside the supernova remnant compact star is not
constrained by terrestrial experiments and hence modeled phenomenologically to …

Multimessenger emission from the accretion-induced collapse of white dwarfs

LF Longo Micchi, D Radice… - Monthly Notices of the …, 2023 - academic.oup.com
We present fully general relativistic 3D numerical simulations of accretion-induced collapse
(AIC) of white dwarfs (WDs). We evolve three different WD models (non-rotating, rotating at …

Gravitational Waves from Neutrino-Driven Core Collapse Supernovae: Predictions, Detection, and Parameter Estimation

A Mezzacappa, M Zanolin - arxiv preprint arxiv:2401.11635, 2024 - arxiv.org
Three-dimensional modeling has reached a level of maturity to provide detailed predictions
of the gravitational wave emission in neutrino-driven core collapse supernovae. We review …

Broadening of universal relations at the birth and death of a neutron star

V Guedes, SY Lau, C Chirenti, K Yagi - Physical Review D, 2024 - APS
Certain relations among neutron-star observables that are insensitive to the underlying
nuclear matter equation of state are known to exist. Such universal relations have been …

Dependence of the reconstructed core-collapse supernova gravitational wave high-frequency feature on the nuclear equation of state in real interferometric data

RD Murphy, A Casallas-Lagos, A Mezzacappa… - Physical Review D, 2024 - APS
We present an analysis of gravitational wave (GW) predictions from five two-dimensional
core collapse supernova (CCSN) simulations that varied only in the equation of state (EOS) …

Prospect of unraveling the first-order phase transition in neutron stars with and modes

P Thakur, S Chatterjee, KK Nath, R Mallick - Physical Review D, 2024 - APS
Quasinormal modes of neutron stars are an exciting prospect for analyzing the internal
composition of neutron stars and studying matter at high densities. In this work, we focus on …

Grey Two-moment Neutrino Transport: Comprehensive Tests and Improvements for Supernova Simulations

H Andresen, EP O'Connor, OE Andersen… - arxiv preprint arxiv …, 2024 - aanda.org
Aims. In this work we extended an energy-integrated neutrino transport method to facilitate
efficient, yet precise, modeling of compact astrophysical objects. We particularly focus on …

Universality in supernova gravitational waves with protoneutron star properties

H Sotani, B Müller, T Takiwaki - Physical Review D, 2024 - APS
Gravitational wave signals from core-collapse supernovae are one of the important
observables for extracting the information of dense matter. To extract the properties of …

Investigating the role of nuclear parameters on oscillation modes in hot neutron stars

N Barman, BK Pradhan, D Chatterjee - Physical Review D, 2025 - APS
Recent studies have revealed that certain nuclear parameters are more dominant than
others in governing global neutron star properties, such as its structure or oscillation mode …