Bibcode
DOI
Salabert, D.; Jiménez-Reyes, S. J.
Referencia bibliográfica
The Astrophysical Journal, Volume 650, Issue 1, pp. 451-460.
Fecha de publicación:
10
2006
Revista
Número de citas
22
Número de citas referidas
12
Descripción
We have used observations made with the helioseismic instrument LOWL
collected over ~6 years to carry out an independent study of the
variations of the p-mode damping and excitation rates with solar
activity. We observe significant variations in the mode height, mode
width, and mode velocity power over a wide range of angular-degree
values. Their sensitivities to solar activity show clear evidence of
frequency dependence, with the modes in the frequency range from 2700 to
3300 μHz showing the largest variations and exhibiting a maximum
change centered around 3100 μHz. The mode energy-supply rate is
consistent, at the level of precision of the observations, with a zero
change during the solar cycle and over the range of studied frequencies.
Moreover, the variations with solar activity of each of these parameters
are observed to be more or less independent of l over the range of
studied angular degrees. Our results provide the first in-depth
confirmation of the findings obtained from GONG measurements for
intermediate angular degrees.