The properties of penumbral microjets inclination

TL;DR

This study examines how penumbral microjets' inclination varies within sunspot penumbrae, revealing they follow the magnetic field lines that open outward from the sunspot's core.

Contribution

It provides the first detailed analysis of penumbral microjets' inclination dependence on position within the penumbra, linking microjets to magnetic field geometry.

Findings

Microjet inclination increases towards the outer penumbra edge.

Microjets follow the opening magnetic field lines of the sunspot.

Results support the flux tube model of sunspot magnetic fields.

Abstract

We investigate the dependence of penumbral microjets inclination on the position within penumbra. The high cadence observations taken on 10 November 2006 with the Hinode satellite through the \ion{Ca}{ii} H and G--band filters were analysed to determine the inclination of penumbral microjets. The results were then compared with the inclination of the magnetic field determined through the inversion of the spectropolarimetric observations of the same region. The penumbral microjet inclination is increasing towards the outer edge of the penumbra. The results suggest that the penumbral microjet follows the opening magnetic field lines of a vertical flux tube that creates the sunspot.