Umbral oscillations in a detailed model umbra

✍ Scribed by John H. Thomas; Mark A. Scheuer

• Publisher: Springer
• Year: 1982
• Tongue: English
• Weight: 517 KB
• Volume: 79
• Category: Article
• ISSN: 0038-0938
• DOI: 10.1007/bf00146970

✦ Synopsis

Our theory ofumbral oscillations as resonant modes of magneto-atmospheric waves is extended and confirmed by calculating the resonant modes in a much more detailed model of the umbral atmosphere. The depths of forcing required to produce observed oscillation periods (roughly 140 to 185 s) are in good agreement with the depths ofoverstable convection found in other studies .