The flux and line shape of the fine-structure transitions of \NeII\ and \NeIII\ at 12.8 and 15.55\,μm and of the forbidden transitions of \OI\ λ6300 are calculated for young stellar objects with a range of mass-loss rates and X-ray luminosities using the X-wind model of jets and the associated wide-angle winds. For moderate and high accretion rates, the calculated \NeII\ line luminosity is comparable to or much larger than produced in X-ray irradiated disk models. All of the line luminosities correlate well with the main parameter in the X-wind model, the mass-loss rate, and also with the assumed X-ray luminosity --- and with one another. The line shapes of an approaching jet are broad and have strong blue-shifted peaks near the effective terminal velocity of the jet. They serve as a characteristic and testable aspect of jet production of the neon fine-structure lines and the \OI\ forbidden transitions.
@article{arxiv.1004.4926,
title = {Fine-Structure Line Emission from the Outflows of Young Stellar Objects},
author = {Hsien Shang and Alfred Glassgold and Wei-Chieh Lin and Chun-Fan J. Liu},
journal= {arXiv preprint arXiv:1004.4926},
year = {2010}
}