Physics
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...177..183b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 177, no. 1-2, May 1987, p. 183-185.
Physics
Late Stars, Main Sequence Stars, Stellar Magnetic Fields, Stellar Physics, Energy Storage, Field Strength, Magnetic Flux
Scientific paper
Gray (1985), on the basis of Zeeman broadening measurements on a sample of G and K darfs found an interesting relation between the average magnetic field strength, B, and the areal coverage factor, A0: the product A0B is a constant independent of spectral type and rotational velocity. Pidatella and Stix (1986) applied a non-local form of the mixing length theory to the lower part of the solar convection zone to estimate the size of the overshoot layer and computed the magnetic field strength beyond which thin toroidal flux tubes, located in the overshoot layer, become unstable. In the present work the authors extend the calculations of Pidatella and Stix (1986) to a number of main sequence spectral types, ranging from F5 to K0. A possible explanation of why the Sun does not fit Gray's law is also proposed.
Belvedere Gaetano
Pidatella R. M.
Stix Michael
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