# Formation and material supply of an active-region filament associated with newly emerging flux

## TL;DR

This study investigates the formation of an active-region filament, demonstrating that jets, including cool H-alpha jets and EUV jets, supply sufficient material for the filament, with emerging flux influencing jet activity and magnetic structure.

## Contribution

It reveals that jets, especially cool H-alpha jets, directly supply material for filament formation and highlights the role of emerging flux in jet occurrence and magnetic configuration.

## Key findings

- Jets can supply enough material for filament formation.
- Cool jets can inject plasma directly into the filament.
- Emerging flux influences jet activity and magnetic structure.

## Abstract

With the observations of SDO/AIA 304 {\AA} and NVST H{\alpha} bands, we present the formation process of an active-region filament in active region NOAA 11903 during the period from 02:00 UT to 10:00 UT on November 25, 2013. A series of jets occurring in the vicinity of the south-western footpoint of the filament directly ejected cool and hot plasma to filament height and supplied material for the filament. Some newly emerging flux is found in the vicinity of the filament south-western footpoint during these jets. In this paper, we mainly focus on the material supply of the filament. The plasma mass uploaded by the jets and the mass of the filament are estimated, which manifests the fact that the mass carried by jets can supply sufficient material for the formation of the filament. We found two types of jets. one is H-alpha jet, and the other is EUV jet. The significant finding is that some cool jets seen in the H{\alpha} band but not in the SDO/AIA bands also could eject the cool material for the filament. These results suggest that cool plasma in the low atmosphere can be directly injected into the upper atmosphere and become the filament material by two types of jets. Moreover, the newly emerging flux with non-potential field plays an important role in the appearances of the jets and the magnetic structure of the filament.