pith. sign in

arxiv: 1108.0412 · v2 · pith:HURSMFBLnew · submitted 2011-08-01 · 🌌 astro-ph.HE · astro-ph.CO

Efficient Generation of Jets from Magnetically Arrested Accretion on a Rapidly Spinning Black Hole

Alexander Tchekhovskoy (1) , Ramesh Narayan (2) , Jonathan C. McKinney (3) ((1) Princeton , (2) Harvard , (3) Stanford) This is my paper
classification 🌌 astro-ph.HE astro-ph.CO
keywords accretionenergyarrestedmagneticallyaccretingblackfindflows
0
0 comments X
read the original abstract

We describe global, 3D, time-dependent, non-radiative, general-relativistic, magnetohydrodynamic simulations of accreting black holes (BHs). The simulations are designed to transport a large amount of magnetic flux to the center, more than the accreting gas can force into the BH. The excess magnetic flux remains outside the BH, impedes accretion, and leads to a magnetically arrested disc. We find powerful outflows. For a BH with spin parameter a = 0.5, the efficiency with which the accretion system generates outflowing energy in jets and winds is eta ~ 30%. For a = 0.99, we find eta ~ 140%, which means that more energy flows out of the BH than flows in. The only way this can happen is by extracting spin energy from the BH. Thus the a = 0.99 simulation represents an unambiguous demonstration, within an astrophysically plausible scenario, of the extraction of net energy from a spinning BH via the Penrose-Blandford-Znajek mechanism. We suggest that magnetically arrested accretion might explain observations of active galactic nuclei with apparent eta ~ few x 100%.

This paper has not been read by Pith yet.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Forward citations

Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. GRMHD accretion beyond the black hole paradigm: Light from within the shadow

    astro-ph.HE 2026-04 accept novelty 7.0

    3D GRMHD simulations of accretion onto a JMN-1 horizonless singularity produce a magnetically arrested disk with an accretion rate of ~3e-6 Eddington matching M87* observations and EHT-consistent images, plus central ...

  2. Little Red Dots as Hidden Neutrino Sources

    astro-ph.HE 2026-01 unverdicted novelty 7.0

    Little Red Dots can contribute ~30% of the diffuse neutrino background at TeV-sub-PeV energies through photomeson production in black hole envelopes, with modified flavor ratios at higher energies.

  3. A closer look at the electromagnetic signatures of Bethe-Heitler pair production process in blazars

    astro-ph.HE 2024-01 unverdicted novelty 6.0

    An empirical kernel for Bethe-Heitler pair spectra is introduced and applied to argue that synchrotron emission from these pairs can explain gamma-ray emission in low- and intermediate-peaked blazars for jet regions o...

  4. Polarization Signatures from GRMHD Simulations of Black Hole Accretion

    astro-ph.HE 2026-05 unverdicted novelty 2.0

    Polarization signatures from GRMHD simulations of black hole accretion can help probe disk, corona, and jet properties when combined with X-ray polarimetry observations.