Chromospheric Lines as Diagnostics of Stellar Oscillations
Abstract
Gravitational waves in the chromosphere, theorized as early as 1963 [10], are thoroughly explored in the more recent papers by [7, 8]. Theory predicts that the convective overshoot in the upper photosphere and low chromosphere will readily excite gravity waves. [9] note that these waves are not easily detected because of the long periods, short wavelengths required and slanted propagation angles of the waves themselves (causing small velocity shifts and short duration on individual detector pixels). Recently, [9] find evidence for gravity waves manifested in the f 700Å chromospheric line with frequencies <1 mHz.
- Publication:
-
Precision Spectroscopy in Astrophysics
- Pub Date:
- 2008
- DOI:
- 10.1007/978-3-540-75485-5_79
- Bibcode:
- 2008psa..conf..311P