Radio observations of solar active regions at 7.36 and 37 GHz

Juha Kallunki*, Merja Tornikoski, Dmitrijs Bezrukovs

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

Abstrakti

We present solar radio observations that were made semi-simultaneously with two Nordic–Baltic radio telescopes observing at two different frequency bands, 7.36 GHz and 37 GHz. The two radio telescopes are the Aalto University Metsähovi radio telescope located in Kylmälä, Finland, and the Ventspils International Radio-Astronomy Center (VIRAC) radio telescope located in Irbene, Latvia. The observations presented here were made between autumn 2017 and autumn 2018. We use them to study the active solar regions that are seen in the radio intensity maps at both frequencies. We find that the location of the maximum intensity is different for the two frequency bands, and that their peak intensities do not correlate. Based on these findings we propose a simplified scenario for how the radio sources can form at centimetre and millimetre wavelengths.

AlkuperäiskieliEnglanti
Sivut241-248
Sivumäärä8
JulkaisuAstronomical and Astrophysical Transactions
Vuosikerta32
Numero3
DOI - pysyväislinkit
TilaJulkaistu - 1 jouluk. 2021
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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