RAGtime 24

Session

Observable Signatures of Compact Objects

13 Oct 2022, 16:45

Opava

Conveners

Observable Signatures of Compact Objects

• Agnieszka Janiuk (CTP PAS)

39. Numerical Simulation of accretion tori around black hole

Dilshodbek Bardiev

13/10/2022, 16:45

Talk

The matter orbiting black hole (BH) in micro-quasar or active galactic nuclei forms toroidal accretion disk structures, and multiple tori structures have been recently described as ringed accretion disks (RADs) in full general relativistic approach. We realize a full general relativistic magnetohydrodynamic (GRMHD) numerical simulations related to double toroidal structure immersed into the...

43. Modeling the hard state of MAXI J1820+070 from the perspective of energy balance

Sudeb Ranjan Datta

13/10/2022, 17:50

Talk

From the discovery of the low-mass X-ray binary (LMXB) MAXI J1820+070, it has been observed almost simultaneously by several telescopes, e.g. NICER, NuSTAR, INTEGRAL during different epochs of its outburst. Due to the very good quality of the data, several groups have analysed the timing as well as spectral properties of the data till date. Amazingly it is found that hard and hard-intermediate...

9. Theory Meets Reality: Testing Accretion Disk Models with LMC X-3 and GRO J1655-40

Anastasiya Yilmaz

13/10/2022, 18:15

Talk

We will present a detailed investigation of X-ray spectral models used to fit the thermal accretion disk emission in black-hole X-ray binaries. We fit ~2000 RXTE observations of GRO J1655-40 and LMC X-3 to explore the nature of the accretion disk in strong gravitational fields via non-relativistic and relativistic disk models. We find that the non-relativistic multi-color disk blackbody model...

58. Resolution study of an equilibrium torus in Radiative GRMHD simulations.

Angelos Karakonstantakis (Nicolaus Copernicus Astronomical Center)

Talk

We present 2D global Radiation GRMHD simulation of accretion disks
rotating around a 10 solar mass non-rotating black hole. The gas
initially is set up following the Penna et al. (2013) equilibrium torus
solutions threaded by a poloidal magnetic field. We examined the effect
of resolution in various quantitative values such as the accretion
rate, magnetization, various fluxes and disk...