A5041080408- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Geophysics and Gravity Measurements
- High-pressure geophysics and materials
- Astrophysical Phenomena and Observations
- Astro and Planetary Science
- Magnetic confinement fusion research
- Seismic Waves and Analysis
- Atomic and Subatomic Physics Research
- Cosmology and Gravitation Theories
Pennsylvania State University
2020-2023
We determine the threshold mass for prompt (no bounce) black hole formation in equal-mass neutron star (NS) mergers using a new set of 227 numerical relativity simulations. consider 23 phenomenological and microphysical finite temperature equations state (EOS), including models with hyperons first-order phase transitions to deconfined quarks. confirm existence EOS-insensitive relations between mass, binary tidal parameter at ($\Lambda_{th}$), maximum nonrotating NSs, radii reference NSs....
Using 250 neutron star merger simulations with microphysics, we explore for the first time role of nuclear incompressibility in prompt collapse threshold binaries different mass ratios. We demonstrate that observations thresholds, either from two ratios or one ratio but combined knowledge maximum compactness, will constrain at density K_{max} to within tens percent. This otherwise inaccessible measure can potentially reveal presence hyperons quarks inside stars.
Abstract We present the second data release of gravitational waveforms from binary neutron star (BNS) merger simulations performed by Computational Relativity ( CoRe ) collaboration. The current database consists 254 different BNS configurations and a total 590 individual numerical-relativity using various grid resolutions. released waveform contain strain Weyl curvature multipoles up to <?CDATA $\ell = m 4$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"...
GW190425 was the second gravitational wave (GW) signal compatible with a binary neutron star (BNS) merger detected by Advanced LIGO and Virgo detectors. Since no electromagnetic counterpart identified, whether associated kilonova too dim or localisation area broad is still an open question. We simulate 28 BNS mergers chirp mass of ratio $1 \leq q 1.67$, using numerical-relativity simulations finite temperature, composition dependent nuclear equation state (EOS) neutrino radiation. The energy...
We study the detectability of gravitational-wave signals from subsolar-mass binary neutron star systems by current generation ground-based detectors. find that finite size effects large tidal deformabilities stars and lower merger frequencies can significantly impact sensitivity detectors to these sources. By simulating a matched-filter based search using injected with derived physically motivated equations state, we calculate reduction in conclude loss sensitive volume be as high 78.4% for...
We present, for the first time, recoil velocity estimates binary neutron star mergers using data from numerical relativity simulations. find that merger remnants can have of order a few tens kilometers per second and as high 150 in our dataset. These recoils are attained due to equivalent contributions anisotropic gravitational wave emission well asymmetric ejection dynamical matter during merger. provide fits net its ejecta component function amount ejected matter, which may be useful when...
The LIGO-Virgo gravitational wave detectors have confidently observed 4 events involving neutron stars: two binary star (BNS) mergers (GW170817 and GW190425), star-black hole (GW200105 GW200115). However, our theoretical understanding of the remnant properties such systems is incomplete due to complexities related modeling matter effects very high computational cost corresponding numerical relativity simulations. An important property recoil velocity, which imparted onto anisotropic emission...
We present, for the first time, recoil velocity estimates binary neutron star mergers using data from numerical relativity simulations. find that merger remnants can have of order a few tens km/s and as high $150$ in our dataset. These recoils are attained due to equivalent contributions anisotropic gravitational wave emission well asymmetric ejection dynamical matter during merger. provide fits net its ejecta component function amount ejected matter, which may be useful when constraints on...
The LIGO-Virgo gravitational wave detectors have confidently observed 4 events involving neutron stars: two binary star (BNS) mergers (GW170817 and GW190425), star-black hole (GW200105 GW200115). However, our theoretical understanding of the remnant properties such systems is incomplete due to complexities related modeling matter effects very high computational cost corresponding numerical relativity simulations. An important property recoil velocity, which imparted onto anisotropic emission...
We present the second data release of gravitational waveforms from binary neutron star merger simulations performed by Computational Relativity (CoRe) collaboration. The current database consists 254 different configurations and a total 590 individual numerical-relativity using various grid resolutions. released waveform contain strain Weyl curvature multipoles up to $\ell=m=4$. They span significant portion mass, mass-ratio,spin eccentricity parameter space include targeted events GW170817...
We study the detectability of gravitational-wave signals from sub-solar mass binary neutron star systems by current generation ground-based detectors. find that finite size effects large tidal deformabilities stars and lower merger frequencies can significantly impact sensitivity detectors to these sources. By simulating a matched-filter based search using injected with derived physically motivated equations state, we calculate reduction in conclude loss sensitive volume be as high $78.4 \%$...