本次会议共收录 601 篇报告,分布于 60 个分会。可按标题、作者或正文关键词检索。
共 601 条结果
Cosmological models and their parameters are widely debated, especially about whether the current discrepancy between the values of the Hubble constant, H 0, obtained by Type Ia supernovae (SNe Ia) and the Planck data from the cosmic microwave background radia…
Interdisciplinary Theoretical and Mathematical Science Program 6 National Astronomical Observatory of Japan 7 Georgia Institute of Technology The division of gamma-ray bursts (GRBs) into different classes, other than the ‘short’and ‘long’, has been an active f…
Although astronomers quickly identified stellar implosion as the dominant progenitor of long-duration gamma-ray bursts, the exact mechanism that produces the high angular momenta in the progenitor that is required to produce gamma-ray bursts. The properties of…
? In this talk, I will highlight some of the recent and most exciting theoretical and observational development in gamma-ray bursts (GRBs) that occured in the past decade, alongside some new open questions that I anticipate would be at the forefront of GRB res…
We have systematically presented the effect of the Generalized Uncertainty Principle (GUP) in Casimir wormhole space-time in the recently proposed modified gravity, the so-called symmetric teleparallel gravity, or f(Q) gravity. We consider two famous GUP model…
The era of Gravitational Wave (GW) Astronomy started on 2015, with the first observation of GWs from the merger of a binary black hole (BBH) system by Advanced LIGO. Two years later, the detection of GWs from a binary neutron star (NS-NS) merger by the Advance…
Paris-Observatory GEPI The ESA Gaia astrometric mission has revolutionized our understanding of the Milky Way (MW) by providing six-dimensional phase-space measurements of its stars. Utilizing the third data release (Gaia DR3), we have derived a precise MW rot…
The innermost regions of most galaxies are characterised by the presence of extremely dense nuclear star clusters, which sometimes appear alongside larger stellar structures known as nuclear stellar discs. Understanding the relationship between nuclear star cl…
This work explores the environmental influences on wormholes. Specifically, two classes of wormholes are considered: the Damour-Solodukhin and braneworld types. I will discuss the Damour- Solodukhin wormhole at the galactic center. Our results suggest that gal…
In this talk, I revisited the model of a dust-enshrouded star orbiting a low-luminosity galactic nucleus (Zajacek et al., 2014, 2016, 2017). Although it is quite challenging for dust to survive in hot X-ray-emitting plasma surrounding supermassive black holes…
Electromagnetism is one of the pillars of modern physics and until very recently was nature’s sole messenger. The avenue of multi-messenger astronomy in the recent year is opening a whole new world of observations and promises great advances for science, but n…
Identifying gamma-rays and rejecting the background of cosmic ray hadrons are crucial for veryhigh-energy gamma-ray observation and relevant scientific research. Based on the simulated data from the square kilometer array (KM2A) of LHAASO, eight high-level fea…
Gamma-ray bursts (GRBs) can be probes of the early universe, but currently, only 26% of GRBs observed by the Neil Gehrels Swift Observatory GRBs have known redshifts (z) due to observational limitations. To address this, we estimated the GRB redshift (distance…
Exploring the mid-range γ-ray regime (0.1-50 MeV) remains a significant challenge in astrophysics due to the lack of sensitive instruments in this energy band. To address this gap, we propose the GammaTPC, a novel MeV γ-ray instrument concept utilizing a liqui…
The intersection of General Relativity and geodesy represents a new frontier in Earth sciences. A major task of geodesy is to determine the gravity field of the Earth, e.g. to monitor mass variations. Due to recent advancements in high precision clock comparis…
We study the periapsis shift of a quasi-circular orbit in general static spherically symmetric spacetimes. We derive two formulae in full order with respect to the gravitational field, one in terms of the gravitational mass m and the Einstein tensor and the ot…
We here explore a specific class of scalar field, dubbed quasi-quintessence which exhibits characteristics akin to ordinary matter. Specifically, we investigate under which conditions this fluid can mitigate the classical cosmological constant problem. We rema…
In Einstein’s general relativity, extremely strong gravity can trap light. In a spacetime admitting a singularity, we say that light (or a “photon”) is trapped if it neither escapes to spatial infinity nor falls into the singularity. Null geodesics govern the…
Seculine Consulting Two broad sets of classes of gravitational field propulsion techniques are investigated: classical general relativity field propulsion, and the quantum manipulation of spacetime. Classical approaches in this paper include a Forward Coil, wh…
We investigate the quantum speed limit (QSL) during the time evolution of neutrinos and antineutrinos under the influence of a gravitational field. We derive an analytical expression for the four-vector gravitational potential in the underlying Hermitian Dirac…
The Kerr spacetime is one of the most relevant spacetimes in contemporary astrophysics and describes the spacetime of a rotating black hole. When light rays pass by or are emitted in the close vicinity of a Kerr black hole they are gravitationally lensed and t…
In this talk I consider the propagation of light rays, either in vacuum or in a non-magnetised pressureless plasma, in axially symmetric and stationary spacetimes that describe wormholes. Among other things, I discuss the necessary and sufficient conditions fo…
In two recent papers submitted for publication to Phys. Rev. Letters on May 16, 2024 by R. Ruffini, C.L. Bianco, M. Prakapenia, H. Quevedo, J.A. Rueda, S.R. Zhang, the energy extraction process from the ergosphere of Kerr Black hole has been reconsidered, taki…
In this work we study, within the framework of Cowling approximation, the effect of the electric charge on the gravitational wave frequency of fluid oscillation modes of strange quark stars. For this purpose, the dense matter of the stellar fluid is described…
In this talk I will show that the theoretical model of physical black holes predict that gravitational wave echos acoompanies with all the black hole merger events in real world. The first part of my talk will be introducing the concept of physical black holes…