The X-ray spectrum of the jets in the SS 433 system using the Chandra HETGS

Observations of SS 433 using the Chandra High Energy Transmission Grating S pectrometer are presented. Many lines of highly ionized elements are detect ed; all are detectably broadened by 2000-5000 km s(-1) and the widths do no t depend significantly on the characteristic emission temperature, suggesti ng that the emission occurs in a freely expanding region of constant collim ation. Line ratios show that the base temperature of the jot is below 10 ke V and may be closer to 2.5 keV. The X-ray luminosity during this Observatio n was somewhat lower than average, which may be related to the lower jet te mperature. The blue shifts of lines from low temperature gas are the same a s those of high temperature gas, indicating that jet acceleration occurs cl oser to the compact object than similar to 2x10(11) cm, where the emission lines originate. The image front zeroth order shows extended emission at a scale of similar to2", aligned in the direction of the radio jets.