Distribution of MDIP-mode power correlation coefficients

H. Y. Chang, T. Sekii

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We have analysed a 72-day MDI spherical-harmonic time series to examine temporal variations of p-mode power and their correlation. The power variation is computed by a running-window method after the previous study by Roth (2001), and then distribution function of power correlation between mode pairs is produced. We have confirmed Roth's result that there is an excess of anticorrelated p-modes pairs with close frequencies. On the other hand, the amount of excess was somewhat smaller than the previous study. Moreover, the distribution function does not exhibit significant change when we paired modes with non-close frequencies, implying that the excess is not due to mode coupling. We discuss the possibility of statistical bias playing the central role in producing the excess.

Original languageEnglish
Title of host publicationSOHO 18/GONG 2006/HELAS I Beyond the spherical Sun
StatePublished - Oct 2006
EventSOHO 18/GONG 2006/HELAS I Beyond the spherical Sun - Sheffield, United Kingdom
Duration: 7 Aug 200611 Aug 2006

Publication series

NameEuropean Space Agency, (Special Publication) ESA SP
Volume624 SP
ISSN (Print)0379-6566

Conference

ConferenceSOHO 18/GONG 2006/HELAS I Beyond the spherical Sun
Country/TerritoryUnited Kingdom
CitySheffield
Period7/08/0611/08/06

Keywords

  • Acoustic modes
  • Solar oscillations

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