Remote Oscillatory responses to a solar flare

TL;DR

This paper reveals a magnetic connection between solar flare energy release and increased oscillatory power in the lower atmosphere, suggesting a mechanism for energy redistribution via long-lived wave trains.

Contribution

It demonstrates a magnetic link between flare energy release and oscillatory responses, challenging the idea of purely local effects and indicating large-scale magnetic connectivity.

Findings

Oscillatory power increases in active regions after flares.

Longer-lived wave trains at short periods are observed during flares.

Magnetic connection, not wave propagation, explains the oscillatory responses.

Abstract

The processes governing energy storage and release in the Sun are both related to the solar magnetic field. We demonstrate the existence of a magnetic connection between energy released caused by a flare and increased oscillatory power in the lower solar atmosphere. The oscillatory power in active regions tends to increase in response to explosive events at a different location, but not in the region itself. We carry out timing studies and show that this is probably caused by a large scale magnetic connection between the regions, and not a globally propagating wave. We show that oscillations tend to exist in longer lived wave trains at short periods (P< 200s) at the time of a flare. This may be a mechanism by which flare energy can be redistributed throughout the solar atmosphere.