A5085102646- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- High-pressure geophysics and materials
- Cosmology and Gravitation Theories
- Geophysics and Gravity Measurements
- Black Holes and Theoretical Physics
- Geophysics and Sensor Technology
- Astrophysics and Cosmic Phenomena
- Stellar, planetary, and galactic studies
- Radio Astronomy Observations and Technology
- Solar and Space Plasma Dynamics
- Mechanics and Biomechanics Studies
- Cancer Immunotherapy and Biomarkers
- Magnetic confinement fusion research
- GDF15 and Related Biomarkers
- Relativity and Gravitational Theory
- Astro and Planetary Science
- Astrophysics and Star Formation Studies
- Noncommutative and Quantum Gravity Theories
- Fluid Dynamics Simulations and Interactions
- Historical Studies in Science
- Superconducting and THz Device Technology
- Nuclear Physics and Applications
- Planetary Science and Exploration
Universitat de València
2022-2025
Clinica Universidad de Navarra
2024-2025
University of Illinois Urbana-Champaign
2014-2023
University of Massachusetts Dartmouth
2023
Computational Physics (United States)
2023
Universidad Autónoma de Madrid
2023
Instituto Superior Técnico
2018
Universitat de les Illes Balears
2012-2017
Industrial University of Santander
2016-2017
Friedrich Schiller University Jena
2010
Recent numerical simulations in general relativistic magnetohydrodynamics (GRMHD) provide useful constraints for the interpretation of GW170817 discovery. Combining observed data with these leads to a bound on maximum mass cold, spherical neutron star (the TOV limit): ${M_{\rm max}^{\rm sph}}\lesssim 2.74/β$, where $β$ is ratio uniformly rotating supramassive limit) over nonrotating star. Causality arguments allow be as high $1.27$, while most realistic candidate equations state predict...
Abstract The Laser Interferometer Space Antenna (LISA) will be a transformative experiment for gravitational wave astronomy, and, as such, it offer unique opportunities to address many key astrophysical questions in completely novel way. synergy with ground-based and space-born instruments the electromagnetic domain, by enabling multi-messenger observations, add further discovery potential of LISA. next decade is crucial prepare community LISA’s first observations. This review outlines...
ABSTRACT We perform magnetohydrodynamic simulations in full general relativity (GRMHD) of quasi-circular, equal-mass, binary neutron stars that undergo merger. The initial are irrotational, n = 1 polytropes and magnetized. explore two types magnetic-field geometries: one where each star is endowed with a dipole magnetic field extending from the interior into exterior, as pulsar, other initially confined to interior. In both cases adopted fields dynamically unimportant. merger outcome...
The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders about fundamental theory of nature at play in extreme gravity regime, where gravitational interaction is both strong and dynamical. In this white paper, Fundamental Physics Working Group LISA Consortium summarizes current topics physics observations GWs can be expected provide key input. We briefest reviews then delineate avenues for future research directions discuss connections between working group, other...
We perform magnetohydrodynamic simulations in full general relativity (GRMHD) of a binary black hole-neutron star on quasicircular orbit that undergoes merger. The mass ratio is 3:1, the hole initial spin parameter $a/m=0.75$ ($m$ Christodoulou mass) aligned with orbital angular momentum, and neutron an irrotational $\Gamma=2$ polytrope. About two orbits prior to merger (at time $t=t_B$), we seed dynamically weak interior dipole magnetic field extends into stellar exterior. At $t=t_B$...
Cancer immunotherapies with antibodies blocking immune checkpoint molecules are clinically active across multiple cancer entities and have markedly improved treatment1. Yet, response rates still limited, tumour progression commonly occurs2. Soluble cell-bound factors in the microenvironment negatively affect immunity. Recently, growth differentiation factor 15 (GDF-15), a cytokine that is abundantly produced by many types, was shown to interfere antitumour response. In preclinical models,...
We report results from simulations in general relativity of magnetized disks accreting onto merging black hole binaries, starting relaxed disk initial data. The feature an effective, rapid radiative cooling scheme as a limiting case future treatments with transfer. Here we evolve the systems after binary-disk decoupling through inspiral and merger, analyze dependence on binary mass ratio $q\equiv m_{\rm bh}/M_{\rm BH}=1,1/2,$ $1/4$. find that luminosity associated local is larger than matter...
Inspiraling and merging binary neutron stars are not only important source of gravitational waves, but also promising candidates for coincident electromagnetic counterparts. These systems thought to be progenitors short gamma-ray bursts (sGRBs). We have shown previously that star mergers undergo {\it delayed} collapse a black hole surrounded by weighty} magnetized accretion disk can drive magnetically-powered jets. now perform magnetohydrodynamic simulations in full general relativity...
Wave loading on marine structures is the major external force to be considered in design of such structures. The accurate prediction nonlinear high-order components wave has been an unresolved challenging problem. In this paper, harmonic hydrodynamic forces a bottom-mounted vertical cylinder are investigated experimentally. A large number experiments were conducted Danish Hydraulic Institute shallow water basin cylinder, both flat bed and sloping bed, as part European collaborative research...
Binary neutron star (NSNS) mergers can be sources of gravitational waves coincident with electromagnetic counterpart emission. To solidify their role as multimessenger sources, we present fully 3D, general relativistic, magnetohydrodynamic simulations spinning NSNSs initially on quasicircular orbits that merge and undergo delayed collapse to a black hole (BH). The consist two identical stars modeled $\Gamma=2$ polytropes spin $\chi_{NS}= 0.36$ aligned along the direction total orbital...
We perform general relativistic, magnetohydrodynamic (GRMHD) simulations of merging binary neutron stars incorporating neutrino transport and magnetic fields. Our new radiative module for neutrinos adopts a truncated-moment (M1) formalism. The binaries consist two identical, irrotational modeled by the SLy nuclear equation state (EOS). They are initially in quasicircular orbit threaded with poloidal field that extends from stellar interior into exterior, as typical pulsars. insert processes...
We discuss high-order absorbing constraint preserving boundary conditions for the Z4c formulation of general relativity coupled to moving puncture family gauges. are primarily concerned with preservation and absorption properties these conditions. In frozen coefficient approximation, an appropriate first-order pseudodifferential reduction, we show that subsystem is stable on a four-dimensional compact manifold. analyze remainder initial value problem spherical reduction particular choice...
Black hole-neutron star (BHNS) mergers are one of the most promising targets for multimessenger astronomy. Using general relativistic magnetohydrodynamic simulations BHNS undergoing merger we previously showed that a magnetically driven jet can be launched by $\mathrm{disk}+\text{spinning}$ black hole remnant if neutron is endowed with dipole magnetic field extending from interior into exterior as in radio pulsar. These self-consistent studies considered system mass ratio $q=3:1$, spin...
Events GW170817 and GRB 170817A provide the best confirmation so far that compact binary mergers where at least one of companions is a neutron star (NS) can be progenitors short gamma-ray bursts (sGRBs). An open question for remains values impact initial NS spins. The spins could possibly affect remnant black hole (BH) mass spin, disk formation lifetime jet its luminosity. Here we summarize our general relativistic magnetohydrodynamic simulations spinning, binaries undergoing merger delayed...
Abstract We perform magnetohydrodynamic simulations of accreting, equal-mass binary black holes in full general relativity focusing on the impact hole spin dynamical formation and evolution minidisks. find that during late inspiral sizes minidisks are primarily determined by interplay between tidal field effective innermost stable orbit around each hole. Our calculations support a minidisk forms when Hill sphere is significantly larger than hole’s orbit. As inspirals, radius decreases,...
LISA, the Laser Interferometer Space Antenna, will usher in a new era gravitational-wave astronomy. As first anticipated space-based detector, it expand our view to millihertz sky, where spectacular variety of interesting sources abound: from millions ultra-compact binaries Galaxy, mergers massive black holes at cosmological distances; beginnings inspirals that venture into ground-based detectors' death spiral compact objects holes, and many between. Central realising LISA's discovery...
Abstract The recent discovery by LIGO/Virgo of a merging binary having <?CDATA $\sim 23\,{M}_{\odot }$?> black hole and 2.6\,{M}_{\odot compact companion has triggered debate regarding the nature secondary, which falls into so-called mass gap. Here we explore some consequences assumption that secondary was neutron star (NS). We show with concrete examples heretofore viable equations state (EOSs) rapid uniform rotation may neither be necessary for EOSs nor sufficient others to explain...
The Laser Interferometer Space Antenna (LISA) will be a transformative experiment for gravitational wave astronomy, and, as such, it offer unique opportunities to address many key astrophysical questions in completely novel way. synergy with ground-based and space-born instruments the electromagnetic domain, by enabling multi-messenger observations, add further discovery potential of LISA. next decade is crucial prepare community LISA's first observations. This review outlines extensive...
Motivated by gravitational wave observations of binary neutron-star mergers, we study the thermal index low-density, high-temperature dense matter. We use virial expansion to account for nuclear interaction effects. focus on region validity expansion, which reaches $10^{-3}$ fm$^{-3}$ at $T=5$ MeV up almost saturation density $T=50$ MeV. In pure neutron matter, find an analytical expression index, and show that it is nearly density- temperature-independent, within a fraction percent...
Explaining gravitational-wave (GW) observations of binary neutron star (BNS) mergers requires an understanding matter beyond nuclear saturation density. Our current knowledge the properties high-density relies on electromagnetic and GW observations, physics experiments, general relativistic numerical simulations. Using a phenomenological nonconvex equation state (EoS) we conduct suite numerical-relativity simulations BNS identify observable imprints spectra remnant. Nonconvex regions may be...