Astronomy and astrophysics

The spindown of stars: from the ONC to the Sun

by Aleks Scholz (Dublin)

Europe/Stockholm
FA31

FA31

Description
Rotation is a key parameter in the evolution of stars. From 1 Myr (the age of the ONC) to 4.5 Gyr (the age of the Sun), solar-like stars lose about 1-2 orders of specific angular momentum. The main agents for this rotational braking are believed to be star-disk interaction and magnetically powered stellar winds. Over the last decade, the observational fundament to probe the stellar spindown has dramatically improved. While parameterized models are able to reproduce the main features of the rotational data, the underlying mechanisms are poorly understood. In this context, our recent work on very low mass stars and brown dwarfs has given some interesting clues, for example, we clearly see the bimodal nature of the wind braking. In this talk I will review the status of the field and discuss our most recent results. I will also talk about the relation between a rotating star and a golf ball.