PIRSA:25030131 Conference Strong Gravity

DOI10.48660/25030131

Conference/School: Magnetic Fields Around Compact Objects Workshop

Sridhar, N. (2025). Black Hole Jet Sheath as a Candidate for the Comptonizing Corona. Perimeter Institute. https://pirsa.org/25030131

Sridhar, Navin. Black Hole Jet Sheath as a Candidate for the Comptonizing Corona. Perimeter Institute, Mar. 26, 2025, https://pirsa.org/25030131 

@misc{ pirsa_PIRSA:25030131,
  doi = {10.48660/25030131},
  url = {https://pirsa.org/25030131},
  author = {Sridhar, Navin},
  keywords = {Strong Gravity},
  language = {en},
  title = {Black Hole Jet Sheath as a Candidate for the Comptonizing Corona},
  publisher = {Perimeter Institute},
  year = {2025},
  month = {mar},
  note = {PIRSA:25030131 see, \url{https://pirsa.org}}
}

Abstract

What powers the hard, non-thermal X-rays from accreting compact objects has been a longstanding mystery. In my talk, I will address the underlying question of what energizes the particles of the Comptonizing “corona” against the strong inverse Compton (IC) cooling losses with first-principle particle-in-cell simulations of magnetic reconnection subject to IC cooling in magnetically dominated electron-positron plasmas, and in mildly-magnetized electron-ion plasmas. I will also show---using results of global resistive GRMHD simulations of accreting black holes---that the black hole jet sheath is a site of efficient electromagnetic dissipation through processes such as magnetic reconnection and turbulence. The distribution of bulk motions of the radially outflowing plasma along the jet sheath also resembles a Maxwellian distribution with an effective bulk temperature of a few 100 keV, and this could be a candidate for the Comptonizing corona.

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