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Gor Oganesyan (Gran Sasso Science Institute)19/11/2025 13:30
Gamma-ray bursts (GRBs) are typically observed as brief flashes of MeV radiation. Short-duration GRBs (< 2 s) are commonly associated with neutron star mergers, making them prime multi-messenger sources with gravitational waves. Long-duration GRBs (~20 s), on the other hand, are linked to certain classes of collapsars. Despite this broad dichotomy, recent discoveries have revealed puzzling...
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Atul Ashok PRAJAPATI (University of L'Aquila)19/11/2025 13:45
The XENONnT experiment, located at the INFN Laboratori Nazionali del Gran Sasso (LNGS) in Italy, is a direct dark matter search experiment using a dual-phase xenon Time Projection Chamber (TPC) with a total active mass of 8.6 tonnes. Thanks to its ultra-low background and low-energy threshold, XENONnT is optimized for the detection of Weakly Interacting Massive Particles (WIMPs), while also...
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Merlin Reichard (Technical University of Munich)19/11/2025 14:00
Observationally, we only know that dark matter (DM) interacts gravitationally. Much experimental and observational effort is spent probing further DM-induced signals, particularly interactions between DM and the visible sector. One of these search efforts includes dedicated underground laboratories, trying to measure DM particles scattering off of targets. In this talk, I will discuss the...
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Abineet Parichha (Institut d'Astrophysique de Paris - Sorbonne Université)19/11/2025 14:15
The study of dark matter halos is pivotal in unravelling the nature of dark matter particles, their detection and structure formation in the universe. Our work aims to track and investigate dark matter halo dynamics, from the initial collapse of tiny perturbations forming prompt cusps to the gradual evolution of their profiles into the universal NFW(Einasto) profile. We examine a specific set...
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Akira MIYAZAKI (CNRS/IN2P3/IJCLab)19/11/2025 14:30
The QCD axion is a well-motivated hypothetical particle that simultaneously addresses the strong CP problem and constitutes a compelling cold dark matter candidate. The MADMAX experiment (Magnetized Disk and Mirror Axion Experiment) is designed to search for dark matter axions and similar particles (axion-like particles and dark photons) in the mass range of 40–400 μeV by boosting the...
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Amazigh Ouzriat (IP2I)19/11/2025 14:45
The detection of gravitational waves emitted by binary mergers has opened a new window onto the Universe, offering a unique probe of compact objects across cosmic history. The LIGO-Virgo-KAGRA collaboration has recently released the fourth Gravitational-Wave Transient Catalog (GWTC-4), featuring over 200 confidently identified events, primarily from binary black hole mergers. This...
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Annarita Ierardi (Gran Sasso Science Institute)19/11/2025 15:00
Accurate modeling of the early X-ray emission in short GRBs is essential for probing the GRB engine, understanding jet physics, and improving electromagnetic follow-up of gravitational wave signals from binary neutron star mergers in the context of multi-messenger astronomy.
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Thanks to the operation of the Swift satellite over the last 20 years, we now have access to an extensive archive of... -
Pablo KUNZE19/11/2025 15:15
Dark matter constitutes approximately 85 % of the Universe’s total mass, yet its particle nature remains unresolved. While several astrophysical observations support its existence, the underlying constituent has evaded direct identification. Weakly Interacting Massive Particles (WIMPs) represent a leading class of candidates, motivating a sustained experimental program over the past decade...
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Stefano Ascenzi (Gran Sasso Science Institute (GSSI))19/11/2025 16:00
Abstract: Neutron stars are compact objects formed from the gravitational collapse of massive stellar cores. They are among the most extreme objects in the Universe, with central densities exceeding nuclear saturation density and magnetic fields that are the strongest known in nature. Rather than constituting a uniform class, neutron stars display a broad diversity in their observational...
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Tomonori TOTANI (Dept. Astronomy, Univ. Tokyo)19/11/2025 16:15
Fifteen years of the Fermi Large Area Telescope (LAT) data in the halo region of the Milky Way (MW) are analyzed to search for gamma rays from dark matter annihilation. Gamma-ray maps within the region of interest (|l|≤60 deg, 10≤|b|≤60 deg) are modeled using point sources, the GALPROP models of cosmic-ray interactions, isotropic background, and templates of Loop I and the Fermi bubbles, and...
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CHIARA DE LEO (Sapienza, University of Rome)19/11/2025 16:30
Next-generation gravitational wave observatories like the Einstein Telescope and Cosmic Explorer will open new windows into cosmology. On one hand Gravitational Waves can trace the large-scale structure of the universe, working alongside traditional galaxy surveys to enhance our ability to test and refine cosmological models. On the other hand, as standard sirens, gravitational wave sources...
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Daniel Kerszberg (LPNHE, CNRS/IN2P3)19/11/2025 16:45
Dwarf spheroidal galaxies (dSphs) are among the most dark matter (DM) dominated objects, with negligible expected astrophysical gamma-ray emission. This makes nearby dSphs ideal targets for indirect searches of a DM particle signal. The accurate knowledge of their DM content makes it possible to derive robust constraints on the velocity-weighted cross section of DM annihilation. We report on a...
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Mlle Sreedevi V V V V (MNIT Jaipur, INDIA)19/11/2025 17:00
Space radiation poses a significant challenge for long-duration human space missions, with primary sources including Galactic Cosmic Rays (GCRs), Solar Particle Events (SPEs), and trapped particles within the Van Allen belts. These high-energy radiations induce severe biological effects on astronauts and degrade spacecraft systems, making effective shielding a critical requirement....
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Yunyang Luo (University of Science and Technology of China)19/11/2025 17:15
PandaX-4T is a multi-tonne-scale dark matter direct searching experiment, utilizing 3.7 tonne liquid xenon as target material in sensitive volume. The experiment is located at China Jinping Underground Laboratory, with overburden of 2400 meter water equivalent. In 2024, the PandaX-4T experiment has released various search results. And this report will introduce the recent progress of searches...
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M. Rinchen Sherpa (Indian Institute of Science)
A variety of detection techniques employing different materials has been suggested for the direct detection of low-mass galactic dark matter particles, which fall below the sensitivity of traditional direct detection experiments. Bilayer graphene is one such material that has been proposed for the detection of sub-MeV mass dark matter particles through electronic excitations. In this work, we...
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Kaushal Pillay (University of Otago.)
In an ongoing project, we are analyzing the response of a static black hole to (non-linear) perturbations by gravitational waves in the asymptotic regime. We now look to analyze what happens when the ingoing gravitational wave carries linear momentum and to compute the linear Bondi-Sachs momentum in the emitted radiation. In this talk, we will discuss some of the numerical set-up, and our...
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