The time evolution of HH~2 from four epochs of HST images

A. C. Raga, B. Reipurth, P. F. Velázquez +2

We have analyzed four epochs of H$\alpha$ and [S~II] HST images of the HH~1/2 outflow (covering a time interval from 1994 to 2014) to determine proper motions and emission line fluxes o…