160-min pulsation of the sun - New observational results

Details 160-min pulsation of the sun - New observational results 160-min pulsation of the sun - New observational results

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991soph..133...95k&link_type=abstract

(IRIS /International Research on the Interior of the Sun/ Workshop, 2nd, Tashkent, Uzbek SSR, Sept. 1989, Proceedings. A91-37551

Physics

1

Radial Velocity, Solar Cycles, Solar Oscillations, Solar Physics, Doppler Effect, Periodic Variations, Power Spectra, Solar Magnetic Field

Scientific paper

This paper presents the power spectrum of the total 15-yr set (1974-1988) of the measurements at the Crimean Astrophysical Observatory (USSR) of the solar line-of-sight velocity. The power spectrum reveals a splitting of the 160-min peak, which may be associated with the 11-yr solar cycle. In addition to the earlier reported periodicity, P0, of 160.009 (+ or - 1) min, a second periodicity P1 occurs, which is 160.014 (+ or - 1) min. It is suggested that the appearance of P1 might be the evidence of a sidelobe mode of the P0 oscillation, induced by rapid rotation of the central solar core.

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