The consequence of jet interacting with a warped disc

TL;DR

This paper presents a novel analogy between jet interactions with warped accretion discs in active galactic nuclei and a sprinkler mechanism, explaining broad-line region features and angular momentum dissipation.

Contribution

It introduces a new conceptual model linking jet-disc interactions to observed AGN phenomena and addresses the angular momentum problem in accretion disc theory.

Findings

Explains broad-line region features via jet-baryon collisions.

Provides a natural mechanism for angular momentum dissipation.

Suggests a new analogy for jet-disc interactions in AGNs.

Abstract

The sprinkler pivots on a bearing on top of its threaded attachment nut. It is driven in a circular motion by a spring-loaded arm pushed back by the water stream which returns to "impact" the stream. The water stream can thus rotate around a fix axis. Analogously in our universe, the outflow or jet formed by the relativistic plasma corresponds to the water stream of a sprinkler; and the baryons in the tilted outer accretion disc or torus play the role of "impact arm". Then the jet aligning with the inner parts of a warped disc can directly "touch" the outer region of the disc. The resultant collision between such rapid leptons and slow baryons automatically accounts for the main features of broad-line region of active galactic nuclei. Moreover, it naturally provides a channel of dissipating the angular momentum of an accretion disc, which has long been a problem in theory of accretion disc.