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Astrophysics and Space Science

, Volume 292, Issue 1–4, pp 539–545 | Cite as

Near-IR [Fe ii] Emission Diagnostics: Disk Winds in Young Stars

  • N. Pesenti
  • C. Dougados
  • S. Cabrit
  • D. O'Brien
  • P.J.V. Garcia
Article

Abstract

We investigate in this contribution emissivity properties of the [Fe ii] near-IR lines and their application to the study of jets in young stars. We report a model-independent method to determine the gas phase abundance in jets. Then, we present synthetic maps deduced from a recent self-consistent MHD cold disk wind model from which the thermal solution has been solved a posteriori. Kinematics is compared with observations in the [Fe ii] near-IR lines of L1551-IRS5. General kinematical behaviour is well reproduced, the existence of two velocity components in particular. However, we note a relative deficit in emission at intermediate velocity as observed in the jets from optically visible T Tauri stars. We examine predicted rotation signatures for various types of MHD disk winds. Compared to observations of DG Tau, warm disk winds reproduce quite well observed velocity shifts, whereas cold solutions predict too high toroidal velocities by a factor 2–3.

jets outflows ISM infrared 

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Copyright information

© Kluwer Academic Publishers 2004

Authors and Affiliations

  • N. Pesenti
    • 1
  • C. Dougados
    • 1
  • S. Cabrit
    • 2
  • D. O'Brien
    • 3
  • P.J.V. Garcia
    • 3
  1. 1.Laboratoire d'Astrophysique de GrenobleGrenoble cedexFrance
  2. 2.LERMAObservatoire de ParisFrance
  3. 3.Centro de Astrofí sica da Universidade do PortoFrance

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