دورية أكاديمية
Long quasi-periodic oscillations of sunspots and nearby magnetic structures
| العنوان: | Long quasi-periodic oscillations of sunspots and nearby magnetic structures |
|---|---|
| المؤلفون: | Smirnova, V., Riehokainen, A., |
| المساهمون: | Aalto-yliopisto, Aalto University |
| سنة النشر: | 2016 |
| المجموعة: | Aalto University Publication Archive (Aaltodoc) / Aalto-yliopiston julkaisuarkistoa |
| مصطلحات موضوعية: | Sun: oscillations, Sun: radio radiation, sunspots |
| الوصف: | Aims. Simultaneous study of long quasi-periodic oscillations in sunspots (using line-of-sight magnetic field data) and nearby magnetic structures located above them (using radio emission data at 37 GHz) was the basic aim of this work. Methods. Data from the ground-based radio-telescope (Metsähovi Radio Observatory, Aalto University, Finland) and the Helioseismic and Magnetic Imager instrument on-board the Solar Dynamics Observatory spacecraft were obtained and analyzed. We used the wavelet (Morlet) analysis and the fast Fourier transform (FFT) method to obtain the oscillation periods. Results. Long-period oscillations in intervals of 200-400 min were found both in radio and in magnetic field data. The interpretation of these oscillations and their propagation to higher levels of the solar atmosphere are discussed in the context of a shallow sunspot model. © 2013 ESO. ; Peer reviewed |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 0004-6361 1432-0746 |
| العلاقة: | ASTRONOMY AND ASTROPHYSICS; Volume 552; Smirnova , V , Riehokainen , A , "Solov'ev" , A , Kallunki , J , Zhiltsov , A & Ryzhov , V 2013 , ' Long quasi-periodic oscillations of sunspots and nearby magnetic structures ' , Astronomy and Astrophysics , vol. 552 , A23 . https://doi.org/10.1051/0004-6361/201219600Test; PURE UUID: 07e9b2c4-0d05-4ba4-ab7b-187a096235c2; PURE ITEMURL: https://research.aalto.fi/en/publications/07e9b2c4-0d05-4ba4-ab7b-187a096235c2Test; PURE LINK: http://adsabs.harvard.edu/abs/2013A%26A.552A.23STest; PURE FILEURL: https://research.aalto.fi/files/6575465/Long_quasi_periodic.pdfTest; https://aaltodoc.aalto.fi/handle/123456789/21806Test; URN:NBN:fi:aalto-201609023276 |
| DOI: | 10.1051/0004-6361/201219600 |
| الإتاحة: | https://doi.org/10.1051/0004-6361/201219600Test https://aaltodoc.aalto.fi/handle/123456789/21806Test |
| حقوق: | openAccess |
| رقم الانضمام: | edsbas.D20CBFA5 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 00046361 14320746 |
|---|---|
| DOI: | 10.1051/0004-6361/201219600 |