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Proper motions of the HH 1 jet

Velázquez, P. F.; Bally, J.; Raga, A. C. +9 more

We describe a new method for determining proper motions of extended objects, and a pipeline developed for the application of this method. We then apply this method to an analysis of four epochs of [S II] HST images of the HH 1 jet (covering a period of ≈20 yr). We determine the proper motions of the knots along the jet, and make a reconstruction o…