3.8 Article

Modeling Reconstructed Images of Jets Launched by SANE Super-Eddington Accretion Flows around SMBHs with the ngEHT

Journal

GALAXIES
Volume 10, Issue 6, Pages -

Publisher

MDPI
DOI: 10.3390/galaxies10060117

Keywords

accretion disk; relativistic Jet; GRMHD

Funding

  1. NSF
  2. NSF via XSEDE/ACCESS resources [AST-1816420, AST-2034306, TG-AST080026N, 21-atp21-0077]
  3. Institute for Theory and Computation at the Center for Astrophysics and grants [HST-GO-16173.001-A]
  4. Black Hole Initiative at Harvard University [AST-1935980]
  5. Gordon and Betty Moore Foundation
  6. John Templeton Foundation

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This study models the thermal synchrotron emission of jets in tidal disruption events (TDEs) and demonstrates that TDE jets could be important targets for research, especially in the case of super-Eddington accretion disks. The study also suggests that rapidly rotating black holes and nearly face-on jets may appear as superluminal sources.
Tidal disruption events (TDEs) around supermassive black holes (SMBHs) are a potential laboratory to study super-Eddington accretion disks and sometimes result in powerful jets or outflows which may shine in the radio and sub-millimeter bands. In this work, we modeled the thermal synchrotron emission of jets by general relativistic radiation magneto-hydrodynamics (GRRMHD) simulations of a BH accretion disk/jet system which assumed the TDE resulted in a magnetized accretion disk around a BH accreting at & SIM;12-25 times the Eddington accretion rate. Through synthetic observations with the Next Generation Event Horizon Telescope (ngEHT) and an image reconstruction analysis, we demonstrate that TDE jets may provide compelling targets within the context of the models explored in this work. In particular, we found that jets launched by a SANE super-Eddington disk around a spin a*=0.9 reach the ngEHT detection threshold at large distances (up to 100 Mpc in this work). A two-temperature plasma in the jet or weaker jets, such as a spin a*=0 model, requires a much closer distance, as we demonstrate detection at 10 Mpc for limiting cases of a*=0,R=1 or a*=0.9,R=20. We also demonstrate that TDE jets may appear as superluminal sources if the BH is rapidly rotating and the jet is viewed nearly face on.

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