Bibcode
Salabert, D.; Jiménez-Reyes, S. J.; Tomczyk, S.
Referencia bibliográfica
Astronomy and Astrophysics, v.408, p.729-736 (2003)
Fecha de publicación:
9
2003
Revista
Número de citas
25
Número de citas referidas
15
Descripción
11 years of low degree helioseismic data collected by the
IRIS++ network (International Research of the Interior of the
Sun) have been analyzed. The epoch covered (mid-1989 to end-1999) spans
the maximum and the falling phase of solar cycle 22 and the rising phase
of the current solar cycle 23. Annual timeseries with an overlap of 6
months are used to study the variations with solar activity of the
p-mode frequencies nu n,l, heights Hn,l, and
linewidths Gamma n,l, taking into account the effects of the
window function. These are used to infer variations in the velocity
power and the energy supply rate dot
En,l which relate to changes in the excitation and the
damping of the modes. We find global changes over the range 2600 <=
nu <= 3600 mu Hz of about -26%, 11%, -11% for the heights, the
linewidths, and the velocity power respectively, and a constant energy
supply to the modes.