دورية أكاديمية
Observations of H alpha intensity oscillations in a flare ribbon
| العنوان: | Observations of H alpha intensity oscillations in a flare ribbon |
|---|---|
| المؤلفون: | McAteer, RTJ, Gallagher, PT, Brown, DS, Bloomfield, DS, Moore, R, Williams, DR, Mathioudakis, M, Katsiyannis, A, Keenan, FP |
| المساهمون: | UCL |
| المصدر: | The Astrophysical Journal : an international review of astronomy and astronomical physics, Vol. 620, no. 2, p. 1101-1106 (2005) |
| بيانات النشر: | Univ Chicago Press |
| سنة النشر: | 2005 |
| المجموعة: | DIAL@UCL (Université catholique de Louvain) |
| مصطلحات موضوعية: | Sun : chromosphere, Sun : flares, Sun : magnetic fields, Sun : oscillations, Sun : photosphere |
| الوصف: | High-cadence Halpha blue wing observations of a C9.6 solar flare obtained at Big Bear Solar Observatory using the Rapid Dual Imager are presented. Wavelet and time-distance methods were used to study oscillatory power along the ribbon, finding periods of 40 - 80 s during the impulsive phase of the flare. A parametric study found statistically significant intensity oscillations with amplitudes of 3% of the peak flare amplitude, periods of 69 s (14.5 mHz) and oscillation decay times of 500 s. These measured properties are consistent with the existence of flare-induced acoustic waves within the overlying loops. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 0004-637X 1538-4357 |
| العلاقة: | boreal:39519; http://hdl.handle.net/2078.1/39519Test; urn:ISSN:0004-637X; urn:EISSN:1538-4357 |
| DOI: | 10.1086/427084 |
| الإتاحة: | https://doi.org/10.1086/427084Test http://hdl.handle.net/2078.1/39519Test |
| رقم الانضمام: | edsbas.3859D292 |
| قاعدة البيانات: | BASE |
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