Raga, A. C. and Noriega-Crespo, A. and Kajdic, P. and De Colle, F. and Lόpez-Cámara, D. and Esquível, A. (2011) Variable jets with non-top hat ejection cross sections: a model for the knots of the HH 34 jet. Revista Mexicana de Astronomía y Astrofísica, 47 (2). pp. 277-288. ISSN 0185-1101 http://resolver.caltech.edu/CaltechAUTHORS:20111109-105459761
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We compute axisymmetric, single-sinusoidal mode variable ejection models with a non-top hat ejection velocity cross section. We find that for decreasing edge-to-center velocity ratios one obtains internal working surfaces with progressively more extended bow shock wings. These wings produce [S H] emission which partially fills in the inter-knot regions in predicted intensity maps. We then compute 3-mode models (with parameters appropriate for the HH 34 jet), and compare predicted intensity maps with archival HST images of HH 34. We find that a model with a moderate edge-to-center velocity ratio produces knot structures with morphologies and time-variabilites with clear similarities to the observations of HH 34.
|Additional Information:||© 2011 Instituto de Astronomía, Universidad Nacional Autónoma de México. Received 2010 December 15; accepted 2011 May 9. This work was supported by the Conacyt grants 61547, 101356 and 101975. We acknowledge the support of E. Palacios of the ICN-Universidad Nacional Autόnoma de México computing staff. We also thank an anonymous referee for helpful comments.|
|Subject Keywords:||ISM: jets and outflows, ISM: kinematics and dynamics, stars: mass-loss, stars: pre-main sequence|
|Official Citation:||Variable jets with non-top hat ejection cross sections: a model for the knots of the HH 34 jet A. C. Raga, A. Noriega-Crespo, P. Kajdic, F. De Colle, D. López-Cámara, & A. Esquivel|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||09 Nov 2011 20:55|
|Last Modified:||09 Nov 2011 20:55|
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