Analysis of Physical Conditions in Herbig-Haro Objects

Abstract

The aim of this work is to search optical spectra of Herbig-Haro objects in Taurus star-forming region and analyse it to make a diagnosis on their physical conditions. We study the degree of excitation, tracers of electron density, electron temperature and degree of ionization that are properties which are studied by the analysis on the forbidden emission lines. From a total of 57 catalogued objects, the lines of a sample of 30 knots are presented. It is obtained a range on electron temperature from 0:9 x 104K and > 1:5 x 104K, an average electron density of 2:5 x 10 3cm -3 and a minimum electron excitation of 15%