Coronal Mass Ejections from a Rapidly-Rotating K0 Dwarf Star

Cameron, A. Collier; Robinson, R. D.

doi:10.1007/978-94-009-3037-7_26

A. Collier Cameron³ &
R. D. Robinson⁴

Part of the book series: NATO ASI Series ((ASIC,volume 241))

Abstract

We present a new set of time-resolved H_α spectra of the rapidly-rotating southern K0 dwarf star AB Doradus (= HD 36705). These data show that clouds of neutral hydrogen are forming in the outer corona of the star at the rate of about two per day, and are subsequently being ejected from the system. We propose a cloud formation scenario analogous to solar quiescent prominence formation, and estimate the likely importance of these cloud ejections as a magnetic braking mechanism in young low-mass stars. The magnetic braking timescale resulting from this process alone could be as short as 10⁷ years.

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References

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Authors and Affiliations

Astronomy Centre, University of Sussex, BN1 9QH, Brighton, England
A. Collier Cameron
Anglo-Australian Observatory, PO Box 296, 2121, Epping, NSW, Australia
R. D. Robinson

Authors

A. Collier Cameron
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R. D. Robinson
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Editors and Affiliations

Smithsonian Astrophysical Observatory, Cambridge, MA, USA
A. K. Dupree
Universidade do Porto, Porto, Portugal
M. T. V. T. Lago

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Cameron, A.C., Robinson, R.D. (1988). Coronal Mass Ejections from a Rapidly-Rotating K0 Dwarf Star. In: Dupree, A.K., Lago, M.T.V.T. (eds) Formation and Evolution of Low Mass Stars. NATO ASI Series, vol 241. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3037-7_26

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DOI: https://doi.org/10.1007/978-94-009-3037-7_26
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-7865-8
Online ISBN: 978-94-009-3037-7
eBook Packages: Springer Book Archive

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