A5031408388- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Cosmology and Gravitation Theories
- Geophysics and Gravity Measurements
- High-pressure geophysics and materials
- Astrophysics and Cosmic Phenomena
- Seismic Waves and Analysis
- Atomic and Subatomic Physics Research
- Radio Astronomy Observations and Technology
- Geophysics and Sensor Technology
- Stellar, planetary, and galactic studies
- Dark Matter and Cosmic Phenomena
- Advanced Frequency and Time Standards
- Magnetic confinement fusion research
- Cold Atom Physics and Bose-Einstein Condensates
- earthquake and tectonic studies
- Mechanical and Optical Resonators
- Seismic Imaging and Inversion Techniques
- Radiology practices and education
- Seismology and Earthquake Studies
- Astro and Planetary Science
- Experimental and Theoretical Physics Studies
- Superconducting Materials and Applications
- Galaxies: Formation, Evolution, Phenomena
Tamkang University
2019-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
2022-2024
Scuola Normale Superiore
2022-2024
National Institute for Subatomic Physics
2024
Istituto Nazionale di Fisica Nucleare, Sezione di Perugia
2024
University of Perugia
2024
University of Amsterdam
2024
Ulsan National Institute of Science and Technology
2023
Universidade Estadual Paulista (Unesp)
2018
University of L'Aquila
2014-2015
KAGRA is a gravitational-wave (GW) detector constructed in Japan with two unique key features: It was underground, and the test-mass mirrors are cooled to cryogenic temperatures. These features not included other kilometer-scale detectors but will be adopted future such as Einstein Telescope. performed its first joint observation run GEO600 2020. In this observation, sensitivity of GWs inferior that LIGO Virgo. However, further upgrades ongoing reach for detecting next run, which scheduled...
We consider the spike mass density profile in a dark halo by self-consistently solving relativistic Bondi accretion of matter onto non-spining black hole $M$. assume that dominant component is Standard model gauge-singlet scalar. Its $m\simeq 10^{-5}{\rm eV}$ and quartic self-coupling $\lambda\lesssim10^{-19}$ are constrained to be compatible with properties galactic halos. In hydrodynamic limit, we find rate bounded from below, $\dot{M}_{\rm min}=96\pi G^2M^2 m^4/\lambda\hbar^3$. Therefore,...
Abstract We study quark-hadron hybrid stars with sharp phase transitions assuming that conversions at the interface are slow. Hadronic matter is described by a set of equations state (EoS) based on chiral effective field theory and quark generic bag model. Due to slow interface, there an extended region stable central densities above density maximum mass star. explore systematically role transition pressure energy-density jump Δϵ some global properties stars, such as mass, last...
The crystalline color superconducting phase is believed to be the ground state of deconfined quark matter for sufficiently large values strange mass. This has remarkable property being more rigid than any known material. It can therefore sustain shear stresses, supporting torsional oscillations amplitude. could lead observable electromagnetic signals if stars have a crust. Indeed, considering simple model star with bare surface, it turns out that positive charge localized in narrow shell...
In the context of binary inspiral mixed neutron star - black hole systems, we investigate excitation oscillation modes by orbital motion. We study generic eccentric orbits and show that tidal interaction can excite f-mode oscillations computing amount energy angular momentum deposited into motion forces via closed form analytic expressions. cold stars using recent microscopic nuclear equations state, compute their imprint emitted gravitational waves.
We perform a detailed analysis of the fundamental $f$-mode frequencies and damping times nonrotating boson stars in general relativity by solving nonradial perturbation equations. Two parameters which govern microscopic properties bosonic condensates, namely self-coupling strength mass scalar particle, are explored. These two quantities characterize oscillations star. Specifically, we reexamine some empirical relations that describe terms radius stars. found it is possible to constrain...
Strange stars are one of the possible compact stellar objects that can form after a supernova collapse. We consider model strange star having an inner core in color-flavor locked phase surmounted by crystalline color superconducting (CCSC) layer. These two phases constitute quarksphere, which we assume to be largest and heaviest part star. The next layer consists standard nuclear matter forming ionic crust, hovering on top quarksphere prevented from falling strong dipolar electric field....
We study quark-hadron hybrid stars with sharp phase transitions assuming that conversions at the interface are slow. Hadronic matter is described by a set of equations state (EoS) based on chiral effective field theory and quark generic bag model. Due to slow interface, there an extended region stable central densities above density maximum mass star. explore systematically role transition pressure energy-density jump $\Delta \epsilon$ some global properties stars. find for given pressure,...
— Strange stars with a crystalline color superconducting crust can sustain large shear stresses, supporting torsional oscillations of amplitude. We consider simple model strange star bare quark matter surface. When oscillation is excited, for example by stellar glitch, the positive charge at surface oscillates, typical kHz frequencies, 1 km thick crust, to hundreds Hz, 9 crust. Higher order few GHz, be reached if centimeters thick. The estimated emitted power 10 erg/s.