paint-brush
Magnetized Bondi Accretion: Here's What it Is and How We Used Itby@magnetosphere

Magnetized Bondi Accretion: Here's What it Is and How We Used It

tldt arrow

Too Long; Didn't Read

Accretion flows in galactic nuclei involve magnetized plasma, and it has been long known that magnetic fields strongly perturb the energetics (Shvartsman 1971; Meszaros 1975) and dynamics (Igumenshchev & Narayan 2002; Pen et al. 2003; Lalakos et al. 2022) of Bondi accretion.
featured image - Magnetized Bondi Accretion: Here's What it Is and How We Used It
Magnetosphere: Maintaining Habitability on Earth HackerNoon profile picture

This paper is available on arxiv under CC 4.0 license.

Authors:

(1) Hyerin Cho (조혜린), Center for Astrophysics | Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA and Black Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USA;

(2) Ben S. Prather, CCS-2, Los Alamos National Laboratory, PO Box 1663, Los Alamos, NM 87545, USA;

(3) Ramesh Narayan, enter for Astrophysics | Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA and Black Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USA;

(4) Priyamvada Natarajan, Black Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USA, Department of Astronomy, Yale University, Kline Tower, 266 Whitney Avenue, New Haven, CT 06511, USA and Department of Physics, Yale University, P.O. Box 208121, New Haven, CT 06520, USA;

(5) Kung-Yi Su, Center for Astrophysics | Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA and Black Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USA;

(6) Angelo Ricarte, Center for Astrophysics | Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA and Black Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USA;

(7) Koushik Chatterjee, Center for Astrophysics | Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA and Black Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USA.

Abstract and Introduction

Numerical Methods

Hydrodynamic Bondi Accretion

Magnetized Bondi Accretion

Feedback Via Reconnection-Driven Convection

Summary and Conclusions

Acknowledgements


Appendix

A. GRMHD Primer and Definitions

B. Numerical Set-up

C. Resolution and Initial Condition Study


References

4. MAGNETIZED BONDI ACCRETION

Accretion flows in galactic nuclei involve magnetized plasma, and it has been long known that magnetic fields strongly perturb the energetics (Shvartsman 1971; Meszaros 1975) and dynamics (Igumenshchev & Narayan 2002; Pen et al. 2003; Lalakos et al. 2022) of Bondi accretion.


Apart from a toy model with purely radial magnetic field and a non-spinning BH, where no dynamical interaction occurs between the fluid and the magnetic field (Gammie et al. 2003), there is no known analytical solution to the magnetized accretion problem. It can be studied only via numerical simulations. Our computational technique is well-suited for this.













This paper is available on Arxiv under CC 4.0 license.