Helioseismic evidence of two solar granulation timescales

Vázquez Ramió, H.; Régulo, C.; Roca Cortés, T.
Referencia bibliográfica

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

Fecha de publicación:
11
2005
Número de autores
3
Número de autores del IAC
3
Número de citas
10
Número de citas referidas
10
Descripción
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).