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Evolution of the Outer Atmospheres of Pre-Main-Sequence Stars

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Pulsation and Mass Loss in Stars

Part of the book series: Astrophysics and Space Science Library ((ASSL,volume 148))

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Abstract

An overall view is presented of the outer atmospheric properties of pre-main-sequence (PMS) stars and how these change as the stars evolve towards the main sequence. The youngest stars are characterised by very strong interaction with the surrounding molecular cloud, often involving an accretion disk and a strong bipolar outflow. With time the dominance of the stellar appearance by external processes diminishes and the true stellar properties become more apparent. The chromospheric, coronal and wind properties of PMS stars vary on both short-term and evolutionary timescales. The short-term variability provides important information on atmospheric inhomogeneity that is complementary to more detailed modelling. The naked T Tauri (NTT) stars, which actually comprise the vast majority of PMS stars, are discussed in detail, because they play a vital role in understanding the evolution of PMS activity and the temporal behaviour of star-formation.

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Author information

Authors and Affiliations

  1. Joint Institute for Laboratory Astrophysics, University of Colorado and National Bureau of Standards, 80309-0440, Boulder, Colorado, USA

    Alexander Brown

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  1. Alexander Brown
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Editor information

Editors and Affiliations

  1. Dipartimento di Astronomia, Università degli Studi di Trieste, Italy

    R. Stalio

  2. Physics Department, Iowa State University, Ames, USA

    L. A. Willson

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© 1988 Kluwer Academic Publishers

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Brown, A. (1988). Evolution of the Outer Atmospheres of Pre-Main-Sequence Stars. In: Stalio, R., Willson, L.A. (eds) Pulsation and Mass Loss in Stars. Astrophysics and Space Science Library, vol 148. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3029-2_7

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  • DOI: https://doi.org/10.1007/978-94-009-3029-2_7

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-010-7861-0

  • Online ISBN: 978-94-009-3029-2

  • eBook Packages: Springer Book Archive

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