Differential emission measure of solar nanoflares measured with the SITES algorithm

Sergey Belov; Leonid Ledentsov; Dmitrii Zavershinskii; Sergey Bogachev

doi:10.12737/stp-102202401

UDC 523.947 UDC 523.9-739

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DIFFERENTIAL EMISSION MEASURE OF SOLAR NANOFLARES MEASURED WITH THE SITES ALGORITHM Differential emission measure of solar nanoflares measured with the SITES algorithm

АА Аа

Published in Solar-Terrestrial Physics · Volume 10, Issue 2 · Pages 3–12 · Rubric: Results of current research

DOI: https://doi.org/10.12737/stp-102202401

Received: 04.12.2023 Accepted: 21.03.2024 Published: 25.06.2024 Language of publication: ENG

Authors

Sergey Belov

Leonid Ledentsov

Dmitrii Zavershinskii

Sergey Bogachev

ORCID ResearcherID

Sergey Belov

Samara National Research University Russian Federation · Samara

Samara Branch of Lebedev Physical Institute RAS Russian Federation · Samara

Leonid Ledentsov

Samara National Research University Russian Federation · Samara

Sternberg Astronomical Institute Russian Federation · Moscow

Dmitrii Zavershinskii

Samara National Research University Russian Federation · Samara

Samara Branch of Lebedev Physical Institute RAS Russian Federation · Samara

Sergey Bogachev

Academic degree: doctor of physical and mathematical sciences

Space Research Institute of RAS Russian Federation · Moscow

Samara National Research University Russian Federation · Samara

ORCID ResearcherID

ABSTRACT

The paper presents the results of a study of capabilities of the SITES algorithm for reconstructing the differential emission measure (DEM) of a source from its radiation in several parts of the electromagnetic spectrum in the context of observing solar nanoflares with the AIA/SDO instrument. The SITES method was implemented in the Python programming language and was first used to construct the DEM of nanoflares. For this purpose, we tested the efficiency of the algorithm on model single- and double-peak DEM at characteristic temperatures of solar nanoflares. The test results indicate that the SITES algorithm can be of limited applicability for studying the DEM of nanoflares in the single-peak approximation. The algorithm has a combination of high accuracy and high counting rate in the studied temperature range from 1 to 3 MK. The features of DEM nanoflares reconstructed by the SITES method were examined using our previously found sample of 58855 events observed in 2019 with the AIA/SDO instrument. The results confirm that the characteristic plasma temperature in nanoflares is 1–2 MK. The reconstructed DEM of nanoflares generally have one maximum within this range, but the temperature distribution we obtained for all flares forms two clusters with maxima at 1.2 and 1.7 MK. We interpret this as possible evidence for the existence of two types of solar nanoflares, but this result requires further confirmation.

KEYWORDS

nanoflares, differential emission measure (DEM), quiet Sun

Funding

Differential emission measure of solar nanoflares measured with the SITES algorithm

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Editor-in-Chief

Geliy Zherebtsov

solater@iszf.irk.ru

Deputy Editor-in-Chief

Aleksandr Stepanov

stepanov@gaoran.ru

Deputy Editor-in-Chief

Alexander Potapov

potapov@iszf.irk.ru

Executive Secretary of Editorial Board

Natalia Polyushkina

npol@iszf.irk.ru

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GOST

Belov S. A., Ledentsov L. S., Zavershinskii D. I., Bogachev S. A. Differential emission measure of solar nanoflares measured with the SITES algorithm // Solar-Terrestrial Physics. 2023. no. 2. pp. 3-12. DOI: https://doi.org/10.12737/stp-102202401. (Date of access 24.10.2026).

MLA

Sergey Belov, Ledentsov L. S., Zavershinskii D. I., Bogachev S. A.. "Differential emission measure of solar nanoflares measured with the SITES algorithm." Solar-Terrestrial Physics 10.2 (2023): 3-12. DOI: https://doi.org/10.12737/stp-102202401.

APA

Belov S. A., Ledentsov L. S., Zavershinskii D. I., Bogachev S. A. (2023). Differential emission measure of solar nanoflares measured with the SITES algorithm. Solar-Terrestrial Physics, 10(2), 3-12. https://doi.org/10.12737/stp-102202401

Chicago

Sergey Belov, Ledentsov L. S., Zavershinskii D. I., Bogachev S. A.. "Differential emission measure of solar nanoflares measured with the SITES algorithm." Solar-Terrestrial Physics 10, no. 2 (2023): 3-12. https://doi.org/10.12737/stp-102202401.

WIKI

{{cite journal | author = Belov S. A., Ledentsov L. S., Zavershinskii D. I., Bogachev S. A. | title = Differential emission measure of solar nanoflares measured with the SITES algorithm | journal = Solar-Terrestrial Physics | year = 2023 | volume = 10 | issue = 2 | pages = 3-12 | doi = 10.12737/stp-102202401 }}

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DIFFERENTIAL EMISSION MEASURE OF SOLAR NANOFLARES MEASURED WITH THE SITES ALGORITHM Differential emission measure of solar nanoflares measured with the SITES algorithm

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