Raga, A. C. and Rodríguez-González, A. and Noriega-Crespo, A. and Esquivel, A. (2012) New Variable Jet Models for HH 34. Astrophysical Journal Letters, 744 (1). L12. ISSN 0004-637X http://resolver.caltech.edu/CaltechAUTHORS:20120124-111331857
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We consider newly derived proper motions of the HH 34 jet to reconstruct the evolution of this outflow. We first extrapolate ballistic trajectories for the knots (starting from their present-day positions and velocities) and find that at ~1000 yr in the future most of them will merge to form a larger-mass structure. This mass structure will be formed close to the present-day position of the HH 34S bow shock. We then carry out a fit to the ejection velocity versus time reconstructed from the observed proper motions (assuming that the past motion of the knots was ballistic) and use this fit to compute axisymmetric jet simulations. We find that the intensity maps predicted from these simulations do indeed match reasonably well the [S II] structure of HH 34 observed in Hubble Space Telescope images.
|Additional Information:||© 2012 The American Astronomical Society. Received 2011 September 8; accepted 2011 November 25; published 2011 December 12. Based on observations made with the NASA/ESA Hubble Space Telescope, and obtained from the Hubble Legacy Archive, which is a collaboration between the Space Telescope Science Institute (STScI/NASA), the Space Telescope European Coordinating Facility (ST-ECF/ESA), and the Canadian Astronomy Data Centre (CADC/NRC/CSA). The work of A.R., A.R.G., and A.E. was supported by the CONACyT grants 61547, 101356, and 101975. We thank John Bally (the referee) for helpful comments.|
|Subject Keywords:||circumstellar matter; Herbig-Haro objects; ISM: individual objects (HH34); ISM: jets and outflows; stars: formation|
|Official Citation:||New Variable Jet Models for HH 34 A. C. Raga et al. 2012 ApJ 744 L12|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Jason Perez|
|Deposited On:||25 Jan 2012 23:26|
|Last Modified:||26 Dec 2012 14:44|
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