A catalog of multi-vantage point observations of type-II bursts: Statistics and correlations

TL;DR

This paper compiles a multi-vantage point catalog of type-II radio bursts, analyzing their properties and correlations with solar flares and CMEs, revealing strong links between particle acceleration in different solar regions.

Contribution

It introduces a new catalog of type-II bursts with multi-vantage observations and develops novel metrics linking flare and CME power to particle acceleration.

Findings

Strong correlation between flare and CME power metrics.

Link established between low-corona and interplanetary particle acceleration.

Catalog enables better understanding of type-II burst properties across viewpoints.

Abstract

Coronal mass ejection (CME) often produces a soft X-ray (SXR) flare associated with the low-coronal reconnection and a type-II radio burst associated with an interplanetary (IP) CME-shock. SXR flares and type-II bursts outshine the background emission, making them sun-as-a-star observables. Though there exist SXR flare catalogs covering decades of observations, they do not provide the associated type-II luminosity. Besides, since radio burst emission could be beamed, the observed flux dynamic spectrum may vary with line of sight. Using long-term calibrated decameter-hectometric dynamic spectra from the Wind and STEREO spacecraft, we build a catalog of multi-vantage point observations of type-II bursts. Cross-matching with existing catalogs we compile the properties of the associated flare, reconnection, and the CME. Cross-correlation analysis was done between various parameters. Two novel metrics of flare and CME power show a strong correlation revealing a link between particle acceleration strengths in the low-corona and IP space.