MHD Waves and Coronal Seismology: an overview of recent results

TL;DR

This paper reviews recent advances in understanding MHD waves in the solar atmosphere, focusing on controversies, interpretations, and emerging topics like coronal Alfven waves and QPP in solar flares.

Contribution

It provides a concise overview of recent debates and new developments in coronal seismology related to MHD wave phenomena.

Findings

Discussion of the controversy over propagating intensity perturbations

Interpretation of transverse loop oscillations

Search for coronal torsional Alfven waves

Abstract

Recent observations have revealed that MHD waves and oscillations are ubiquitous in the solar atmosphere, with a wide range of periods. We give a brief review of some aspects of MHD waves and coronal seismology which have recently been the focus of intense debate or are newly emerging. In particular, we focus on four topics: (i) the current controversy surrounding propagating intensity perturbations along coronal loops, (ii) the interpretation of propagating transverse loop oscillations, (iii) the ongoing search for coronal (torsional) Alfven waves and (iv) the rapidly developing topic of quasi-periodic pulsations (QPP) in solar flares.