[Ne ii] emission line profiles from photoevaporative disc winds
نویسنده
چکیده
I model profiles of the [Ne ii] forbidden emission line at 12.81μm, emitted by photoevaporative winds from discs around young, solar-mass stars. The predicted line luminosities (∼ 10L⊙) are consistent with recent data, and the line profiles vary significantly with disc inclination. Edge-on discs show broad (30–40 km s−1) double-peaked profiles, due to the rotation of the disc, while in face-on discs the structure of the wind results in a narrower line (≃ 10 km s−1) and a significant blue-shift (5–10 km s−1). These results suggest that observations of [Ne ii] line profiles can provide a direct test of models of protoplanetary disc photoevaporation.
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