Titlebook: Ultracool Dwarfs; New Spectral Types L Hugh R. A. Jones,Iain A. Steele Conference proceedings 2001 Springer-Verlag Berlin Heidelberg 2001 B

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Cholesterol

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Surface Features, Rotation and Atmospheric Variability of Ultra Cool Dwarfs, with their evolution possibly driven by rotation and turbulence. An alternative possibility is magnetically-induced surface features. However, chromospheric activity undergoes a sharp decrease between M7 and L1, which may be related to the observed greater occurrence of variability in objects later than M9.

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978-3-642-62682-1Springer-Verlag Berlin Heidelberg 2001

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