Global Oscillations at Low Frequency from the SOHO Mission (GOLF)

Details Global Oscillations at Low Frequency from the SOHO Mission (GOLF) Global Oscillations at Low Frequency from the SOHO Mission (GOLF)

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995soph..162...61g&link_type=abstract

Solar Physics, Volume 162, Issue 1-2, pp. 61-99

Physics

186

Sun, Helioseismology

Scientific paper

The GOLF experiment on the SOHO mission aims to study the internal structure of the sun by measuring the spectrum of global oscillations in the frequency range 10-7 to 10-2 Hz. Bothp andg mode oscillations will be investigated, with the emphasis on the low order long period waves which penetrate the solar core. The instrument employs an extension to space of the proven ground-based technique for measuring the mean line-of-sight velocity of the viewed solar surface. By avoiding the atmospheric disturbances experienced from the ground, and choosing a non-eclipsing orbit, GOLF aims to improve the instrumental sensitivity limit by an order of magnitude to 1 mm s-1 over 20 days for frequencies higher than 2.10-4 Hz. A sodium vapour resonance cell is used in a longitudinal magnetic field to sample the two wings of the solar absorption line. The addition of a small modulating field component enables the slope of the wings to be measured. This provides not only an internal calibration of the instrument sensitivity, but also offers a further possibility to recognise, and correct for, the solar background signal produced by the effects of solar magnetically active regions. The use of an additional rotating polariser enables measurement of the mean solar line-of-sight magnetic field, as a secondary objective.

Affiliated with

Also associated with

No associations

Rating

Global Oscillations at Low Frequency from the SOHO Mission (GOLF) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Global Oscillations at Low Frequency from the SOHO Mission (GOLF), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Global Oscillations at Low Frequency from the SOHO Mission (GOLF) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1564744