Helioseismic evidence of two solar granulation timescales

Details Helioseismic evidence of two solar granulation timescales Helioseismic evidence of two solar granulation timescales

Nov 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005a%26a...443l..11v&link_type=abstract

Astronomy and Astrophysics, Volume 443, Issue 1, November III 2005, pp.L11-L14

Astronomy and Astrophysics

Astrophysics

3

Sun: Helioseismology, Sun: Photosphere, Sun: Granulation, Sun: Activity

Scientific paper

The signature of two different scales of solar granulation in the power spectrum of disk integrated irradiance time series is presented. The fitted timescales for granulation (τGR1≈ 237~s and τGR2≈ 62~s) are in good agreement with the characteristic lifetimes derived from recent image time series of the Sun's surface (Del Moro 2004); and probably linked to magnetic chromospheric structures such as bright points (Harvey et al. 1993).

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