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Relativistic Fluids around Compact Objects

5–9 May 2025
CAMK
Europe/Warsaw timezone

Session

Tuesday morning

6 May 2025, 09:30
Lecture Room (CAMK)

Lecture Room

CAMK

Bartycka 18

Conveners

Tuesday morning

  • Agnieszka Janiuk

Tuesday morning

  • Agnieszka Janiuk

Presentation materials

There are no materials yet.

  1. 39. Numerical Simulations of Supercritical Accretion Flows Around a Compact Object
    Yuta Asahina (Tohoku University)
    06/05/2025, 09:30
    Accretion
    Review talk

    Rotating plasma forms an accretion disk around compact objects such as black holes and neutron stars. The gravitational energy released during accretion is converted into the kinetic energy, internal energy, and radiation energy. A portion of the converted energy is ejected into interstellar space via outflows and radiation. However, the detailed structure of the accretion disk and the...

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  2. 15. Quantum kinetics of neutrinos in dense astrophysical environments
    Hiroki Nagakura (National Astronomical Observatory of Japan)
    06/05/2025, 10:00
    Supernovae
    Review talk

    Neutrinos play a crucial role in determining fluid dynamics and nucleosynthesis in core-collapse supernova (CCSN) and binary neutron star merger (BNSM). The neutrino kinetics which governs their transport in phase space, interactions with matter, and flavor conversions (or neutrino oscillations) is essential to develop realistic models of CCSN and BNSM. Accurate determination of neutrino...

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  3. 52. Radiation hydrodynamical simulations of super-Eddington mass-transfer in close BH binaries
    Daisuke Toyouchi (Osaka University)
    06/05/2025, 10:30
    Numerical simulations
    Standard talk

    Radiation-driven outflows play a crucial role in extracting mass and angular momentum from binary systems undergoing rapid mass transfer at super-Eddington rates. We study this process by conducting three-dimensional radiation hydrodynamical simulations of mass-transferring BH binary systems. Our simulations show that super-Eddignton mass transfer leads to a significant mass loss from the...

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  4. 5. General Relativistic Magnetohydrodynamic Simulations of Accretion Flows onto Merging Supermassive Black Holes
    Bruno Giacomazzo (University of Milano-Bicocca)
    06/05/2025, 11:15
    Numerical simulations
    Review talk

    I will present the results of our fully general relativistic magnetohydrodynamic simulations of accretion flows onto spinning supermassive black hole binary mergers. Supermassive binary black hole systems are formed after galaxy collisions and they are powerful sources of gravitational waves that will be detected by the future LISA mission. In our simulations we investigated the dynamics of...

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  5. 35. MHD Simulations of Type I Bursts
    Yuri Cavecchi (Universitat Politecnica de Catalunya)
    06/05/2025, 11:45
    Compact stars
    Review talk

    When Neutron Stars are in orbit with a companion star, they can
    capture the outer layers of the latter. This new matter can burn
    unstably on the surface of the star and explode in bright
    X-ray flashes called the Type I Bursts.

    In this talk I will show results of MHD modelling of the flame during
    the Type I Bursts and discuss its link to observations and to the
    properties of the neutron...

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  6. 34. Turbulence and magnetic configurations in neutron star interiors
    Brynmor Haskell (CAMK PAN)
    06/05/2025, 12:15
    Compact stars
    Standard talk

    I will discuss the issues related with calculating the magnetic field structure in the interior of neutron stars, and how numerical simulations can be used to asses the stability and evolution of such configurations.
    In particular I will focus on instabilities and on the development of turbulence. I will show new results in which the turbulence is resolved, and discuss it's impact on...

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  7. 23. Magnetic field dynamics in isolated neutron stars: insights from GRMHD simulations
    Aurora Capobianco (Friedrich-Schiller-Universität Jena)
    06/05/2025, 12:30
    Compact stars
    Standard talk

    The internal magnetic field topology and equilibrium configurations of neutron stars are thought to play a fundamental role in determining the nature and strength of astrophysical phenomena. We model the development of the super strong magnetic fields in neutron stars using the General Relativistic MagnetoHydroDynamic (GRMHD) code AthenaK. In this talk, I will present the long-term evolutions...

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