# Polarization of Astrophysical Events with Precessing Jets

## TL;DR

This paper investigates how precessing jets in astrophysical phenomena like GRBs, TDEs, and AGNs influence emission polarization, highlighting periodic polarization changes as evidence of jet precession.

## Contribution

It introduces a model analyzing polarization signatures of precessing jets across different astrophysical events, emphasizing polarization as a diagnostic for jet precession.

## Key findings

- Polarization angle gradually changes in precessing jets for both magnetic field configurations.
- Non-precessing jets exhibit abrupt 90° polarization angle shifts.
- Polarization properties are periodic, supporting jet precession as a key feature.

## Abstract

A central compact object (CCO, e.g. a black hole) with an accretion disk has been suggested as the common central engine of various astrophysical phenomena, such as gamma-ray bursts (GRBs), tidal disruption events (TDEs) and active galactic nuclei (AGNs). A jet powered by such a system might precess due to the misalignment of the angular momenta of the CCO and accretion disk. Some quasi-periodic behaviors observed in the light curves of these phenomena can be well interpreted within the framework of a precessing jet model. In this paper, we study the emission polarization of precessing jets in the three kinds of phenomena. The polarization angle also shows a gradual change for the synchrotron emission in both the random and toroidal magnetic field configurations with the precessing jet, while it can only change abruptly by $90^\circ$ for the non-precessing top-hat jet. Polarization properties are periodic due to the assumptions made in our model. The polarization observations are crucial to confirm the precession nature of jets in GRBs, TDEs and AGNs.