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Jets from Young Stars IV pp 213–249Cite as

Deriving Physical Diagnostics from Observations

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Part of the book series: Lecture Notes in Physics ((LNP,volume 793))

Abstract

We review in this course diagnostics for the physical conditions in the atomic component of the flow (electronic densities nê, electronic temperatures T e and hydrogen ionization fraction x e ) based on the most prominent optical and near-infrared forbidden emission lines. We discuss both diagnostics independent of the excitation process and methods based on the comparison with radiative shock models. We then detail the different techniques used to derive jet mass-loss rates, an important parameter for launching models, and their associated uncertainties. Finally, we describe important biases introduced by projection and convolution effects which can critically affect the translation of observed quantities into meaningful physical quantities of the flow.

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Author information

Authors and Affiliations

  1. Laboratoire d’Astrophysique de Grenoble, Grenoble, France

    C. Dougados

  2. INAF-Osservatorio Astrofisico di Arcetri, Florence, Italy

    F. Bacciotti

  3. LERMA, UMR 8112 du CNRS, Observatoire de Paris, Paris, France

    S. Cabrit

  4. INAF-Osservatorio Astrofisico di Roma, Monte Porzio Catone, Italy

    B. Nisini

Authors
  1. C. Dougados
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  2. F. Bacciotti
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  3. S. Cabrit
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  4. B. Nisini
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Corresponding authors

Correspondence to C. Dougados , F. Bacciotti , S. Cabrit or B. Nisini .

Editor information

Editors and Affiliations

  1. Centro de Astrofísica, Universidade do Porto, rua das Estrelas s/n, Porto, 4150-762, Portugal

    Paulo Jorge Valente Garcia

  2. Centro de Astrofísica, Universidade do Porto, rua das Estrelas s/n, Porto, 4150-762, Portugal

    Joao Miguel Ferreira

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Dougados, C., Bacciotti, F., Cabrit, S., Nisini, B. (2010). Deriving Physical Diagnostics from Observations. In: Garcia, P., Ferreira, J. (eds) Jets from Young Stars IV. Lecture Notes in Physics, vol 793. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-02289-0_7

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  • DOI: https://doi.org/10.1007/978-3-642-02289-0_7

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  • Print ISBN: 978-3-642-02288-3

  • Online ISBN: 978-3-642-02289-0

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