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Revista mexicana de astronomía y astrofísica
versão impressa ISSN 0185-1101
Rev. mex. astron. astrofis vol.47 no.2 Ciudad de México Out. 2011
An Intepretive Ballistic Model for QuasiSymmetric Bipolar Jet Systems
A. C. Raga,1 A. NoriegaCrespo,2 J. C. RodríguezRamírez,1 V. Lora,3 K. R. Stapelfeldt,4 and S. J. Carey2
1 Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Apdo. Postal 70543, 04510 D.F., Mexico (raga, juan.rodriguez@nucleares.unam.mx).
2 SPITZER Science Center, California Institute of Technology, Pasadena, CA 91125, USA (carey, alberto@ipac.caltech.edu).
3 Astronomisches RechenInstitut Zentrum für Astronomie der Universitüt Heidelberg, Mönchhofstr. 1214 69120 Heidelberg, Germany (vlora@ari.uniheidelberg.de).
4 Jet propulsion Laboratory, California Institute of Technology, MS 183900, 4800 Oak Grove Drive, Pasadena, CA 91109, USA (krs@exoplanet.jpl.nasa.gov).
Received 2011 April 10
Accepted 2011 June 6
RESUMEN
Presentamos un modelo analítico, balístico para sistemas de chorros/contrachorros cuasisimetricos, considerando tanto el caso no relativista como el relativista. El modelo considera la presencia de asimetrías en el tiempo y en la velocidad de eyección, las cuales producen diferencias entre las posiciones de los nudos a lo largo del chorro y del contrachorro. Un ajuste de las predicciones del modelo no relativista a observaciones de dos flujos HH cuasisimetricos (HH 34 y HH 111) nos permite obtener las magnitudes de las asimetrías de tiempo y velocidad de eyección de estos sistemas.
ABSTRACT
We present an analytic, ballistic model for quasisymmetric jet/counterjet systems, considering both the nonrelativistic and the relativistic cases. The model considers the presence of ejection time and velocity asymmetries, which produce offsets between the positions of the knots in jet/counterjet pairs. A fit of the nonrelativistic model predictions to observations of two quasisymmetric HH outflows (HH 34 and HH 111) allows us to obtain the magnitudes of the ejection time and velocity asymmetries of these systems.
Key Words: HerbigHaro objects — infrared: ISM — ISM: individual objects (HH 34, HH 111) — ISM: jets and outflows — stars: formation.
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ACKNOWLEDGMENTS
This work was supported by the Conacyt grants 61547, 101356 and 101975.
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