Molecular entrainment by optical jets

  • Stephen Bence
  • Rachael Padman
Part IV: Outflows—Observations
Part of the Lecture Notes in Physics book series (LNP, volume 465)


Molecular outflows around young stellar objects (YSOs) have been studied extensively. Many models have tried to explain their appearance, and currently the most popular are those which invoke momentum-conserving collimated jets, emanating from the YSO. Two competing models describe the mechanism by which the jet sets the molecular cloud in motion: ‘prompt’ entrainment and ‘turbulent’ entrainment. We present a method for distinguishing between the two cases by examining the velocity structure and the morphology of outflows. We also examine the effects on the observations of viewing angle and show how two well-studied outflows fit into the global picture of jet-molecular cloud interaction. Finally we show evidence for time-dependent ejection of the jet.


Velocity Structure Molecular Cloud Young Stellar Object Molecular Emission Bipolar Outflow 
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  1. Bence S. J., Richer J. S., Padman R., 1995, in prepGoogle Scholar
  2. Cabrit S., Goldsmith P. F., Snell R. L., 1988, ApJ, 334, 196CrossRefADSGoogle Scholar
  3. De Young D. S., 1986, ApJ, 307, 62CrossRefADSGoogle Scholar
  4. Fukui Y., Iwata T., Mizuno A., Bally J., Lane A.P., 1993, Protostars & Planets III, eds. Levy E. H., Lunine J.I., Univ. Arizona: TusconGoogle Scholar
  5. Masson C.R., Chernin L.M., ApJ, 414, 230Google Scholar
  6. Mundt R., Brugel E. W., Bührke T., 1987, ApJ, 319, 275CrossRefADSGoogle Scholar
  7. Parker N. D., Padman R., Scott P. F., 1991, MNRAS, 252, 442ADSGoogle Scholar
  8. Richer J. S., Hills R. E., Padman R., 1992, MNRAS, 254, 525ADSGoogle Scholar
  9. Stahler S. W., 1993, in Astrophysical Jets, ed. D. Burgarella, M. Livio & C. O’Dea, (Cambridge University Press), 183.Google Scholar

Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • Stephen Bence
    • 1
  • Rachael Padman
    • 1
  1. 1.Mullard Radio Astronomy ObservatoryCavendish LaboratoryCambridgeUK

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