Collective Characterization of Polar Crown Filament Eruptions
Abstract
Polar crown filaments (PCFs) are crucially related to the structure of solar polar magnetic fields. They are physically significant because of the ``rush-to-the-pole'' motion, which is an indicator of the poleward drift of magnetic fields from decayed active regions. The formation and evolution of PCFs offer important insights into the Sun's magnetic activity at high latitudes and the solar cycle variation. In this study, we present a collective analysis of 50 PCF disappearance events covering solar cycle 24 and 25. Among them, 24 show rotational motions, and nine have sufficiently clear magnetic configurations for comparison with numerical model predictions. In all nine events, the observed rotation directions agree with the model predictions, suggesting possible magnetic-flux-rope-like structures in these events. All except one of the PCFs in our sample disappeared through eruption rather than thermal disappearance, and most associated CMEs were slow (<800 km s−1). For events accompanied by transient coronal holes, the estimated magnetic flux associated with the dimming regions is on the order of 1020--1021 Mx. Time--distance analysis identifies 22 events with a clear slow-rise to fast-rise transition, with onset heights ranging from several tens to about 160 Mm and a mean onset velocity of about 2.8 km s−1 after excluding the highest-velocity event. Together, these findings characterize the magnetic structure and dynamics of PCF eruptions.
Related
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BibTeX
@misc{xu2026collective,
title = {{Collective Characterization of Polar Crown Filament Eruptions}},
author = {Ying Wang Yan Xu and Ju Jing and Vasyl Yurchyshyn and Haimin Wang},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.05902},
eprint = {2611.05902},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.05902},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Collective Characterization of Polar Crown Filament Eruptions
AU - Ying Wang Yan Xu
AU - Ju Jing
AU - Vasyl Yurchyshyn
AU - Haimin Wang
PY - 2026
DA - 2026/11/04
PB - arXiv
DO - 10.48550/arxiv.2611.05902
UR - https://arxiv.org/abs/2611.05902
AB - Polar crown filaments (PCFs) are crucially related to the structure of solar polar magnetic fields. They are physically significant because of the ``rush-to-the-pole'' motion, which is an indicator of the poleward drift of magnetic fields from decayed active regions. The formation and evolution of PCFs offer important insights into the Sun's magnetic activity at high latitudes and the solar cycle variation. In this study, we present a collective analysis of 50 PCF disappearance events covering solar cycle 24 and 25. Among them, 24 show rotational motions, and nine have sufficiently clear magnetic configurations for comparison with numerical model predictions. In all nine events, the observed rotation directions agree with the model predictions, suggesting possible magnetic-flux-rope-like structures in these events. All except one of the PCFs in our sample disappeared through eruption rather than thermal disappearance, and most associated CMEs were slow (<800 km s^−1). For events accompanied by transient coronal holes, the estimated magnetic flux associated with the dimming regions is on the order of 10^20--10^21 Mx. Time--distance analysis identifies 22 events with a clear slow-rise to fast-rise transition, with onset heights ranging from several tens to about 160 Mm and a mean onset velocity of about 2.8 km s^−1 after excluding the highest-velocity event. Together, these findings characterize the magnetic structure and dynamics of PCF eruptions.
ER -