Spectrophotometric observations of two symbiotic stars.

Spectrophotometric measures of some emission lines for two objects, He2-104 and He2-106, both included in Allen's (1982) list of symbiotic stars, are presented. The symbiotic nature of He2-106 seems well established, since it has a cool component of spectral type M. On the other hand, no cool component has been found for He2-104. He2-106 has a very steep Balmer decrement, suggesting an optical depth at H-alpha greater than 1. The plots of the relevant ratios in Baldwin et al. (1981) diagnostic diagrams show that both objects are separated from the regions occupied in them by planetary nebulae. Their position in the weighted average Delta E, 3757/5007 diagram suggests a temperature of the central star somewhat lower than that accepted for normal planetaries.