Illuminating the Cosmos: Chemical Elements in Stars, Planets, Nebulae, and Transient Extra-galactic Events

Session

Accretion Discs

13 Nov 2026, 09:00

Auditorium (Haus der Astronomie)

67. TBA

Andrew Chael

13/11/2026, 09:00

Talks

23. Toward Radiative Binary Black Hole Accretion Simulations: Magnetic Flux and Cooling Effects

Prof. Manuela Campanelli (Rochester Institute of Technology)

13/11/2026, 09:30

1

Accretion Discs

Talks

We present three-dimensional general-relativistic magnetohydrodynamic simulations of supermassive binary black holes embedded in gas during late inspiral. We investigate how the magnetic-flux content shapes the accretion flow and observe eruptions of magnetic-flux tubes near the black hole horizons. We follow their propagation through the mini-disks and into the circumbinary cavity, where they...

49. Spectral radiative transfer post-processing of GRMHD simulations of black hole accretion

Chris Nagele (Johns Hopkins University)

13/11/2026, 09:50

Accretion Discs

Talks

Spectral observations of accreting black holes are one of our most powerful tools for understanding these enigmatic objects. Relating these spectra to simulations, however, has proven challenging given the many radiative processes at play. We present radiative transfer post-processing of three dimensional general relativistic magnetohydrodymanic (GRMHD) simulations. We partition simulations...

68. TDA

Jim Stone

13/11/2026, 11:00

Talks

56. Magnetically Driven Obliquity in Circumplanetary Disks and Twisted Bipolar-jet Formation

Raul Ortega Chametla (Charles University)

13/11/2026, 11:30

Accretion Discs

Talks

The formation of massive planets is naturally accompanied by the presence of circumplanetary disks (CPDs), which themselves are important channels of gas accretion onto the planet as well as an arena in which satellites may form. Therefore, it is important to understand the structure and evolution of CPDs. Here, we use high-resolution three-dimensional global magnetohydrodynamic simulations to...

57. Analyzing the reawakening of 4U 1755-338 using multi-instrument X-ray data

Geethu Prabhakar

13/11/2026, 11:50

Accretion Discs

Talks

The black hole X-ray binary 4U 1755-338 went into an outburst in 2020, after a 25-ys of quiescence. Comprehensive spectral studies carried out over the entire outburst period uncovered a low neutral hydrogen column density for the system. The outburst starts with a low mass accretion rate, marking it as a low-luminosity outburst. Throughout its evolution, the inner accretion disk radius stayed...