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Issue A&A
Volume 443, Number 3, December I 2005
Page(s) 1013 - 1019
Section Stellar structure and evolution
DOI http://dx.doi.org/10.1051/0004-6361:20053620



A&A 443, 1013-1019 (2005)
DOI: 10.1051/0004-6361:20053620

An observational approach to convection in main sequence stars

C. Régulo1, 2, H. Vázquez Ramió1 and T. Roca Cortés1, 2

1  Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain
    e-mail: [crr;hvr;trc@iac.es]
2  Dpto. de Astrofísica, Universidad de La Laguna, La Laguna, 38206, Tenerife, Spain

(Received 13 June 2005 / Accepted 1 August 2005)

Abstract
Observational results concerning possible changes in the granulation of Main Sequence stars were found by analysing their seismic power spectra obtained from photometric microvariability. We analysed as many as 178 stars with spectral types F, G, K, and M observed for 54 days. We present evidence of changes in the lifetime and contrast of the granulation, which both increase from F to M stars, although within the limit of resolution.


Key words: convection -- stars: interiors -- stars: oscillations

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