Detail publikace

A Novel Technique for the Extraction of Dynamic Events in Extreme Ultraviolet Solar Images

KALENSKÁ, P. RAJMIC, P. GEBRTOVÁ, K. DRUCKMÜLLER, M.

Originální název

A Novel Technique for the Extraction of Dynamic Events in Extreme Ultraviolet Solar Images

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

High-spatial-resolution images of the solar corona acquired in the extreme ultraviolet (EUV), most notably with the Atmospheric Imaging Assembly (AIA) instrument on the Solar Dynamics Observatory (SDO) reveal the abundance of dynamic events which range from flaring bright points and jets to erupting prominences and coronal mass ejections (CMEs). In this work we present novel techniques to extract such dynamic events from the more steady background corona using 17.1 nm SDO-AIA images. The techniques presented here treat any time series of coronal images as a matrix that can be decomposed into two matrices representing the background and the dynamic component, respectively. The latter has the properties of a so-called sparse matrix, and the proposed methods are classified as methods based on sparse representations. The proposed methods are the median-filter method, the principal component pursuit, and the dynamic-mode decomposition, all of which include data pre-processing using the noise-adaptive fuzzy equalization method. The study reveals that the median-filter method and the dynamic-mode decomposition enhance all motions in the time series and produce similar results. On the other hand, the principal component pursuit enables the clear differentiation of CMEs from the background corona, thus providing a valuable tool for the characterization of their acceleration profiles in the low corona as seen in the EUV.

Klíčová slova

Solar coronal mass ejections; Solar corona; Analytical mathematics; Astronomy software; Computational methods

Autoři

KALENSKÁ, P.; RAJMIC, P.; GEBRTOVÁ, K.; DRUCKMÜLLER, M.

Vydáno

7. 11. 2024

Nakladatel

The American Astronomical Society

ISSN

1538-4365

Periodikum

Astrophysical Journal, Supplement Series

Ročník

275

Číslo

1

Stát

Spojené státy americké

Strany počet

10

URL

https://iopscience.iop.org/article/10.3847/1538-4365/ad8633

BibTex

@article{BUT191132,
  author="Petra {Kalenská} and Pavel {Rajmic} and Karolína {Gebrtová} and Miloslav {Druckmüller}",
  title="A Novel Technique for the Extraction of Dynamic Events in Extreme Ultraviolet Solar Images",
  journal="Astrophysical Journal, Supplement Series",
  year="2024",
  volume="275",
  number="1",
  pages="10",
  doi="10.3847/1538-4365/ad8633",
  issn="1538-4365",
  url="https://iopscience.iop.org/article/10.3847/1538-4365/ad8633"
}