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The Origin of Jets from Young Stars: MHD Disk Wind Models Confronted to Observations

  • C. Dougados
  • S. Cabrit
  • J. Ferreira
  • N. Pesenti
  • P. Garcia
  • D. O’Brien
Chapter

Abstract

We discuss in this contribution constraints on the origin of mass-loss from young stars brought by recent observations at high angular resolution (0.1″ = 14 AU) of the inner regions of winds from T Tauri stars. Jet widths and collimation scales, the large extent of the velocity profile as well as the detection of rotation signatures agree with predictions from magneto-centrifugal disk wind ejection models. However dynamically cold disk wind solutions predict too large terminal velocities and too low jet densities and ionisation fractions, suggesting that thermal gradients (originating in an accretion heated disk corona for example) may play an important role in accelerating the flow.

Keywords

T Tauri stars high-angular resolution jets magneto-hydrodynamic 

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Copyright information

© Springer Science+Business Media Dordrecht 2004

Authors and Affiliations

  • C. Dougados
    • 1
  • S. Cabrit
    • 2
  • J. Ferreira
    • 1
  • N. Pesenti
    • 1
  • P. Garcia
    • 3
  • D. O’Brien
    • 3
  1. 1.Laboratoire d’Astrophysique de GrenobleFrance
  2. 2.Observatoire de ParisFrance
  3. 3.University of PortoFrance

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