# Small-scale filament eruptions as the driver of solar coronal hole X-ray jets

## TL;DR

This study reveals that small-scale filament eruptions, similar to larger solar eruptions, drive X-ray jets in coronal holes, challenging the traditional emerging-flux model and suggesting a universal magnetic eruption process across scales.

## Contribution

It demonstrates that miniature filament eruptions, not emerging flux, drive X-ray jets, indicating a common magnetic eruption mechanism across different solar phenomena.

## Key findings

- Filament eruptions drive X-ray jets in coronal holes.
- Eruptions involve internal reconnection of minifilament legs.
- Supports a universal magnetic eruption process from CMEs to jets.

## Abstract

Solar X-ray jets are evidently made by a burst of reconnection of closed magnetic field in a jet's base with ambient "open" field (1,2). In the widely-accepted version of the "emerging-flux" model, that reconnection occurs at a current sheet between the open field and emerging closed field and also makes a compact hot brightening that is usually observed at the edge of the jet's base (1,3). Here we report on high-resolution X-ray and EUV observations of 20 randomly-selected X-ray jets in polar coronal holes. In each jet, contrary to the emerging-flux model, a miniature version of the filament eruptions that initiate coronal mass ejections (CMEs) (4-7) drives the jet-producing reconnection, and the compact hot brightening is made by internal reconnection of the legs of the minifilament-carrying erupting closed field, analogous to solar flares of larger-scale eruptions. Previous observations have found that some jets are driven by base-field eruptions (8-10,12), but only one such study, of only one jet, provisionally questioned the emerging-flux model (13). Our observations support the view that solar filament eruptions are made by a fundamental explosive magnetic process that occurs on a vast range of scales, from the biggest CME/flare eruptions down to X-ray jets, and perhaps down to even smaller jets that are candidates for powering coronal heating (10,14,15). A picture similar to that suggested by our observations was drawn before, inferred from different observations and based on a different origin of the erupting minifilament flux rope (11) (see Methods).