A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Long quasi-periodic oscillations of the faculae and pores
Tekijät: Riehokainen A, Strekalova P, Solov'ev A, Smirnova V, Zhivanovich I, Moskaleva A, Varun N
Kustantaja: EDP SCIENCES S A
Julkaisuvuosi: 2019
Journal: Astronomy and Astrophysics
Tietokannassa oleva lehden nimi: ASTRONOMY & ASTROPHYSICS
Lehden akronyymi: ASTRON ASTROPHYS
Artikkelin numero: A10
Vuosikerta: 627
Sivujen määrä: 7
ISSN: 1432-0746
eISSN: 1432-0746
DOI: https://doi.org/10.1051/0004-6361/201935629
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/41238036
Aims. The main goal of this work is to analyze the structural and temporal evolution of small-scale magnetic structures (SSMSs) observed in the solar atmosphere, such as solitary faculae and pores, and reveal long quasi-periodic oscillations of these structures.Methods. The statistical method of regression analysis and the wavelet transform were used to obtain the periods of oscillations and dependences between the parameters of magnetic structures and periods of oscillations.Results. Long-period oscillations with periods in the interval of 18-260 min are found for the structurally stable phase of SSMSs at the level of the solar photosphere. These long-period oscillations were interpreted as natural oscillations of the structurally stable long-lived magnetic structures around their equilibrium position. These oscillations, which are of similar nature, are observed in the chromospheric bright formations associated with photospheric SSMSs. Dependences between the magnetic field and the continuum intensity of the facula elements were found. It is shown that the continuum intensity of a SSMS decreases when its magnetic field increases.
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