Linewidth of low degree acoustic modes of the Sun

Details Linewidth of low degree acoustic modes of the Sun Linewidth of low degree acoustic modes of the Sun

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.286...27e&link_type=abstract

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

Other

5

P Waves, Solar Oscillations, Spectral Line Width, Acoustic Excitation, Doppler Effect, Helioseismology

Scientific paper

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.

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