Jet/cloud collision, 3D gasdynamic simulations of HH 110

¹ Instituto de Ciencias Nucleares, UNAM, Ap. 70-, 04510 D. F., México e-mail: pablo@nuclecu.unam.mx
² Instituto de Astronomia, Geofisica e Ciencias Atmosfericas, Universidade de São Paulo, R. do Matão 1226, 055-08-090 São Paulo, SP, Brasil e-mail: dalpino@astro.iag.usp.br
³ SIRTF Science Center, California Institute of Technology, IPAC 100-22, Pasadena, CA 91125, USA e-mail: alberto@ipac.caltech.edu
⁴ Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina e-mail: mininni@df.uba.ar

Corresponding author: A. C. Raga, raga@astroscu.unam.mx

Received: 11 April 2002
Accepted: 6 June 2002

Abstract

We present 3D, gasdynamic simulations of jet/cloud collisions, with the purpose of modelling the HH 270/110 system. From the models, we obtain predictions of Hα and H₂ 1–0 s(1) emission line maps, which qualitatively reproduce some of the main features of the corresponding observations of HH 110. We find that the model that better reproduces the observed structures corresponds to a jet that was deflected at the surface of the cloud ~1000 yr ago, but is now boring a tunnel directly into the cloud. This model removes the apparent contradiction between the jet/cloud collision model and the lack of detection of molecular emission in the crossing region of the HH 270 and HH 110 axes.