A5025182918- Pulsars and Gravitational Waves Research
- Black Holes and Theoretical Physics
- Cosmology and Gravitation Theories
- Astrophysical Phenomena and Observations
- Noncommutative and Quantum Gravity Theories
- Gamma-ray bursts and supernovae
- Atomic and Subatomic Physics Research
- Relativity and Gravitational Theory
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum Electrodynamics and Casimir Effect
- Radio Astronomy Observations and Technology
- Geophysics and Sensor Technology
- Adaptive optics and wavefront sensing
- High-pressure geophysics and materials
- Model Reduction and Neural Networks
- Galaxies: Formation, Evolution, Phenomena
- Geophysics and Gravity Measurements
- Complex Systems and Time Series Analysis
- Superconducting and THz Device Technology
- Iterative Learning Control Systems
- Statistical and numerical algorithms
- Advanced Mathematical Theories and Applications
University of Milano-Bicocca
2022-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca
2022-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2020-2023
Sapienza University of Rome
2020-2023
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
2016-2018
Scuola Internazionale Superiore di Studi Avanzati
2015-2018
University of Trieste
2016-2018
Abstract The Einstein Telescope (ET), the European project for a third-generation gravitational-wave detector, has reference configuration based on triangular shape consisting of three nested detectors with 10 km arms, where each detector 'xylophone' made an interferometer tuned toward high frequencies, and low frequencies working at cryogenic temperature. Here, we examine scientific perspectives under possible variations this design. We perform detailed evaluation science case single...
The evaporation of black holes raises a number conceptual issues, most them related to the final stages evaporation, where interplay between central singularity and Hawking radiation cannot be ignored. Regular models replace with nonsingular spacetime region, in which an effective classical geometric description is available. It has been argued that these provide effective, but complete, at all times up their eventual disappearance. However, here we point out known fail self-consistent:...
Generic models of regular black holes have separate outer and inner horizons, both with nonzero surface gravity. It has been shown that a horizon gravity results in exponential instability at the controlled by this parameter. This phenomenon takes name "mass inflation instability", its presence put question physical viability as alternatives to their (singular) general relativity counterparts. In paper, we show it is possible make vanish, while maintaining separation between non-zero We...
Gravitational-wave measurements of the tidal deformability in neutron-star binary coalescences can be used to infer still unknown equation state (EOS) dense matter above nuclear saturation density. By employing a Bayesian-ranking test, we quantify ability current and future gravitational-wave observations discriminate among families nuclear-physics based EOS which differ particle content ab initio microscopic calculations. While constraining power GW170817 is limited, show that even twenty...
Measuring the quasi-normal mode~(QNM) spectrum emitted by a perturbed black-hole~(BH) --~also known as BH spectroscopy~-- provides an excellent opportunity to test predictions of general relativity in strong-gravity regime. We investigate prospects and precision spectroscopy massive binary black hole ringdowns, one primary science objectives future Laser Interferometric Space Antenna~(LISA) mission. simulate various population models, featuring competing prescriptions for Delays between...
Compact boson-star binaries are hypothetical sources for ground-based and space gravitational-wave detectors. Their signal would be a messenger novel fundamental fields could shed light on the dark matter. In this work, we further develop our analysis [Phys. Rev. D 102, 083002 (2020)], aimed at constraining properties of these objects with future observations. We use coherent waveform template inspiral stage large quartic self-interactions, including tidal deformability nonlinear dependence...
The relativistic multipole moments provide a key ingredient to characterize the gravitational field around compact astrophysical objects. They play crucial role in description of orbital evolution coalescing binary systems and encode valuable information on nature binary's components, which leaves measurable imprint their gravitational-wave emission. We present new study multipolar structure class arbitrarily spinning boson stars with quartic self-interactions large coupling limit, where...
Gravitational-wave black-hole spectroscopy provides a unique opportunity to test the strong-field regime of gravity and nature final object formed in aftermath merger. Here we investigate prospects for with third-generation gravitational-wave detectors, particular Einstein Telescope different configurations, possibly combination Cosmic Explorer. Using state-of-the-art population model stellar-origin binary black holes informed by LIGO-Virgo-KAGRA data, compute average number expected events...
Gravitational-wave (GW) detections of binary neutron star coalescences play a crucial role to constrain the microscopic interaction matter at ultrahigh density. Similarly, if boson stars exist in universe their coalescence can be used fundamental coupling constants scalar field theory. We develop first coherent waveform model for inspiral with quartic interactions. The includes coherently spin-induced quadrupolar and tidal-deformability contributions terms masses spins single constant show...
Regular black holes represent a conservative model in which the classical singularity is replaced by non-singular core without necessarily modifying spacetime outside trapping horizon. Given possible lack of phenomenological signatures, it crucial to study consistency model. In this short work, we review physical mechanism leading instability central core, arguing that non-perturbative backreation non-negligible and must be taken into account provide meaningful description holes.
Regular black holes with nonsingular cores have been considered in several approaches to quantum gravity, and as agnostic frameworks address the singularity problem Hawking's information paradox. While a recent work we argued that inner core is destabilized by linear perturbations, opposite claims were raised regular fact stable cores. To reconcile these arguments, discuss generalization of geometrical framework, originally applied Reissner--Nordtsr\"om Ori, show an exponentially growing...
Regular black holes are generically unstable because of the classical phenomenon that goes by name ``mass inflation'' which destabilizes inner horizon. In a recent article, [A. Bonanno, A.-P. Khosravi, and F. Saueressig, Phys. Rev. D 107, 024005 (2023)], it is argued semiclassical effects due to Hawking radiation can cure this instability, some concerns raised against validity previous analyses showing its existence in first place. short comment, we explain our reservations regarding these...
Combining multiple gravitational-wave observations allows for stringent tests of general relativity, targeting effects that would otherwise be undetectable using single-event analyses. We highlight how the finite size observed catalog induces a significant source variance. If not appropriately accounted for, relativity can excluded with arbitrarily large credibility even if it is underlying theory gravity. This effect generic and holds catalogs. Moreover, we show cannot suppressed by...
We argue that the Smarr Formula for black holes can be expressed in terms of a Noether charge surface integral plus suitable volume integral, any gravitational theory. The integrals constructed as an application Wald's formalism. apply this formalism to compute mass and static Lovelock holes. Finally, we propose new prescription entropy case holes, which takes into account topological contributions functional.
Einstein-Maxwell-dilaton theory is an interesting and well-motivated theoretical laboratory to explore the impact of new fundamental degrees freedom in context testing no-hair conjecture, due existence hairy black hole solutions together with propagation scalar, vector tensor modes. In this paper we compute quasinormal mode spectrum static slowly rotating holes for generic values dilaton coupling, within a weak electric charge approximation. Our results suggest that these spacetimes are...
Astrophysical observations of neutron stars have been widely used to infer the properties nuclear matter equation state. Beside being a source information on average dense matter, data provided by electromagnetic and gravitational wave (GW) facilities are reaching accuracy needed constrain, for first time, underlying dynamics. In this work, we assess sensitivity current future star directly strength repulsive three-nucleon forces, which key determine stiffness Using Bayesian approach, focus...
Black-hole spectroscopy, that is, measuring the characteristic frequencies and damping times of different modes in a black-hole ringdown, is powerful probe for testing deviations from general theory relativity (GR). In this work, we present comprehensive study on its ability to identify spectrum Kerr black hole GR. Specifically, investigate performance spectroscopy diverse set theoretically motivated as well phenomenologically modified spectra. We find while signal-to-noise ratio...
The gravitational waves emitted during the coalescence of binary black holes are an excellent probe to test behavior strong gravity. In this paper, we propose a new called merger-ringdown consistency that focuses on probing imprints dynamics in strong-gravity around black-holes plunge-merger and ringdown phase. Furthermore, present scheme allows us efficiently combine information across multiple observations perform statistical null GR using detected BH population. We proof-of-concept study...
We show that the monopole scalar charge of black holes in Einstein--Maxwell--dilaton theory is proportional to electric potential at event horizon, with a proportionality factor given by (minus) coupling constant. also charge, weak limit, does not depend on hole spin. This result can be very useful circumvent spin degeneracy issues when testing against gravitational waves observations.
Thermodynamical properties of black holes in gravitational theories without Local Lorentz invariance have been subject to intense investigation the past years due presence universal horizons, which are strong causal barriers even for superluminal signals. Here we present a novel general method deriving Smarr formula this class theories: particular show that formulae Einstein-Aether theory and infrared Horava gravity follow from scale invariance. We not only reproduce straightforwardly...
In Lorentz violating theories of gravitation with a preferred foliation notion black hole is still possible, despite the presence infinitely fast propagating modes. Such event horizons are known as universal horizons. Their discovery poses question whether they satisfy mechanical laws, analogous to ones Killing in symmetric theories, and admit thermodynamical interpretation. this paper we study viability first law for several exact horizon solutions previously derived literature. Our results...