Paper:	Timescales for Spindown on the Lower Main Sequence
Volume:	154, Cool Stars, Stellar Systems and the Sun: Tenth Cambridge Workshop
Page:	1220
Authors:	Buzasi, Derek L.
Abstract:	Recent work (Schussler & Solanki 1992; Caligari, Moreno-Insertis, & Schussler 1994; Buzasi 1997) has demonstrated that rapidly rotating stars should display polar magnetic activity due to the Coriolis effect. Buzasi (1997) has shown that this effect increases with lateness of spectral type, and is particularly pronounced for M stars. One important consequence of the predicted polar activity is the increase in spindown timescales for these stars, since corotation of the emerging wind will be most readily enforced at high latitudes, where angular momentum loss is less efficient. Using simple models, I derive approximate spindown times on the lower main sequence, taking the Coriolis effect into account, and compare these to previous estimates. In addition, I examine these results in light of recent observations of rotational periods of cluster stars.

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