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HEASA 2025 (16 - 20 September)

16–20 Sept 2025
Africa/Johannesburg timezone

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Session

Multi-Messenger & Extreme Cosmic Frontier

17 Sept 2025, 11:00

Conveners

Multi-Messenger & Extreme Cosmic Frontier

  • Lili Yang (Sun Yat-sen University)

Presentation materials

There are no materials yet.

  1. 6. The Gravitational Wave Transient Catalog 4: Results and Tests of General Relativity
    Ofek Birnholtz (Bar Ilan University)
    17/09/2025, 11:00
    GRBs, FRBs and other Transients
    Invited Talk

    The worldwide network of gravitational-wave (GW) detectors, comprised of the Advanced LIGO, Advanced Virgo, and KAGRA detectors has been increasing in sensitivity, range, and hence quantity and quality of detected GW signals from compact binary coalescences.
    We present the compact binary signals observed and included in the GW Transient Catalog 4 (GWTC-4), i.e. up to and including the first...

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  2. 34. Investigating neutron star ULXs as evolutionary precursors to short gamma-ray bursts.
    Lutendo Nyadzani (University of Johannesburg)
    17/09/2025, 11:30
    GRBs, FRBs and other Transients
    Contributed Talk

    The dual detection of a short gamma-ray burst (GRB 170817A) (Goldstein et al., 2017) and a gravitational wave (GW170817) (Abbott et al., 2017) signal marked the first direct confirmation that both phenomena can originate from the same astrophysical event. While the GW and SGRB signals give valuable insights into the properties of the merging neutron stars, they offer little information about...

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  3. 11. The Stability of Anisotropic Compact Stars Influenced by Dark Matter under Teleparallel Gravity: An Extended Gravitational Deformation Approach
    Ms Sneha Pradhan (BITS Pilani Hyderabad campus)
    17/09/2025, 11:45
    Other High-Energy Sources
    Contributed Talk

    In our investigation, we pioneer the development of geometrically deformed strange stars within the framework of teleparallel gravity theory through gravitational decoupling via the complete geometric deformation (CGD) technique. The significant finding is the precise solution for deformed strange star (SS) models achieved through the vanishing complexity factor scenario. Further, we introduce...

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  4. 28. Constraining GRB Prompt Emission Parametres Using IceCube Neutrino Upper Limits and pγ Simulation
    Ms Khushboo Sharma (Aryabhatta Research Institute of Observational Sciences, Nainital, India)
    17/09/2025, 12:00
    GRBs, FRBs and other Transients
    Contributed Talk

    High-energy neutrino detectors such as IceCube and ANTARES have followed up several bright gamma-ray bursts but have not found any associated neutrino signals, instead placing upper limits on the neutrino flux. In this work, we study the photo-hadronic interaction model during the prompt phase of GRBs and estimate the resulting neutrino flux both analytically and numerically using the publicly...

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  5. 26. Searching for astrophysical sources of the highest-energy neutrino event
    Soebur Razzaque
    17/09/2025, 12:15
    Multi-Messenger Astrophysics and Astro-Particle Physics
    Contributed Talk

    The detection of KM3-230213A, the most-energetic neutrino ever detected at an estimated energy of 220 PeV, by the KM3NeT neutrino telescope in the Mediterranean Sea, is a landmark discovery. Given its near horizontal direction and exceptionally high energy, the most likely explanation is that the muon resulted from interaction of a muon neutrino of cosmic origin. In this talk I will provide an...

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