An estimation of global solar p-mode frequencies from IRIS network data: 1989-1996

Details An estimation of global solar p-mode frequencies from IRIS network data: 1989-1996 An estimation of global solar p-mode frequencies from IRIS network data: 1989-1996

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001newa....6..189s&link_type=abstract

New Astronomy, Volume 6, Issue 4, p. 189-195.

Astronomy and Astrophysics

Astronomy

5

Scientific paper

The IRIS network has accumulated full disk helioseismological data since July 1989, i.e. a complete 11-year solar cycle. Since the last paper publishing a frequency list [A&A 317 (1997) L71], not only has the network acquired new data, but has also developed new co-operative programs with compatible instruments [Abstr. SOHO 6/GONG 98 Workshop (1998) 51], so that merging IRIS files with these co-operative program data sets has made possible the improvement of the overall duty cycle. This paper presents new estimations of low degree p-mode frequencies obtained from this IRIS++ data bank covering the period 1989-1996, as well as the variation of their main parameters along the total range of magnetic activity, from before the last maximum to the very minimum. A preliminary estimation of the peak profile asymmetries is also included.

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