Linewidth of low degree acoustic modes of the Sun

Elsworth, Y. P.; Isaak, G. R.; Jefferies, S. M.; McLeod, C. P.; New, R.; Palle, Pere L.; Regulo, C.; Roca Cortés, Teodoro
Referencia bibliográfica

In ESA, Seismology of the Sun and Sun-Like Stars p 27-29 (SEE N89-25819 19-92)

Fecha de publicación:
12
1988
Número de autores
8
Número de autores del IAC
0
Número de citas
6
Número de citas referidas
5
Descripción
Estimates of the spectral linewidths of low degree (Q=0 and Q=1) 5 min p-modes obtained from Doppler shift observations in 1984, 1986, and 1987 are reported. The observed linewidths increase from 0.5 microHz at 2000 microHz to 3.8 microHz at 4300 microHz for Q = 0. Comparison with other data suggests that for a given frequency the linewidth increases with increasing Q value. On the assumption that the linewidth is substantially due to damping processes the line widths are consistent with e-folding times between 3.7 and 0.5 days.