The Astronomy and Astrophysics Review

, Volume 3, Issue 3–4, pp 257–287 | Cite as

Bipolar molecular outflows

  • R. Bachiller
  • J. Gómez-González


Bipolar molecular outflows are a ubiquitous phenomenon in the process of star formation. We review the main observational properties of the outflows around young stellar objects, highlighting the recent wealth of information provided by the new generation of large radiotelescopes operating at millimeter wavelengths (in particular the IRAM 30-m, the NRO 45-m, and the JCMT 15-m dishes). The observations of outflows containing molecular, jet-like flows and “bullets” are discussed in detail, as they provide key information for understanding origin and evolution of the outflows. We also discuss a number of closely related issues: the evidence for dense shocked gas associated with the flows, the interaction of the outflows with the ambient dense cores, the evolutionary status of the sources driving the outflows, the properties of circumstellar disks, and theoretical models of the origin of the neutral winds. All these areas are important for developing a plausible scenario for the formation and evolution of the bipolar molecular outflows.

Key words

Stars: formation of interstellar medium: molecules millimeter lines radio lines: molecular 


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Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • R. Bachiller
    • 1
  • J. Gómez-González
    • 1
  1. 1.Centro Astronómico de YebesGuadalajaraSpain

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