Cross-loop Propagation of a Quasiperiodic Extreme-ultraviolet Wave Train Triggered by Successive Stretching of Magnetic Field Structures during a Solar Eruption

Sun, Zheng and Tian, Hui and Chen, P. F. and Yao, Shuo and Hou, Zhenyong and Chen, Hechao and Chen, Linjie (2022) Cross-loop Propagation of a Quasiperiodic Extreme-ultraviolet Wave Train Triggered by Successive Stretching of Magnetic Field Structures during a Solar Eruption. The Astrophysical Journal Letters, 939 (2). L18. ISSN 2041-8205

[thumbnail of Sun_2022_ApJL_939_L18.pdf] Text
Sun_2022_ApJL_939_L18.pdf - Published Version

Download (3MB)

Abstract

Solar extreme-ultraviolet (EUV) waves generally refer to large-scale disturbances propagating outward from sites of solar eruptions in EUV imaging observations. Using the recent observations from the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory, we report a quasiperiodic wave train propagating outward at an average speed of ∼308 km s−1. At least five wave fronts can be clearly identified with the period being ∼120 s. These wave fronts originate from the coronal loop expansion, which propagates with an apparent speed of ∼95 km s−1, about 3 times slower than the wave train. In the absence of a strong lateral expansion, these observational results might be explained by the theoretical model of Chen et al., which predicted that EUV waves may have two components: a faster component that is a fast-mode magnetoacoustic wave or shock wave and a slower apparent front formed as a result of successive stretching of closed magnetic field lines. In this scenario, the wave train and the successive loop expansion we observed likely correspond to the fast and slow components in the model, respectively.

Item Type: Article
Subjects: AP Academic Press > Physics and Astronomy
Depositing User: Unnamed user with email support@apacademicpress.com
Date Deposited: 21 Apr 2023 05:55
Last Modified: 24 Sep 2024 11:05
URI: http://info.openarchivespress.com/id/eprint/1034

Actions (login required)

View Item
View Item