Atomic T Tauri disk winds heated by ambipolar diffusion

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

To apear in Rev Mex A A, special issue : Emission lines from jet flows, ed . L. Binette and W. Henney, 2001

Scientific paper

We summarize results on the thermal and ionization structure of self-similar, magnetically-driven, atomic disk winds heated by ambipolar diffusion. We improve upon earlier work by Safier by considering (1) new MHD solutions consistent with underlying cold keplerian disk equilibrium, (2) a more accurate treatment of the micro-physics, and (3) predictions for spatially resolved forbidden line emission (maps, long-slit spectra). The temperature plateau $\simeq 10^4$ K found earlier is recovered, but ionization fractions are revised downward by a factor of 10, due to previous omission of thermal speeds in ion-neutral momentum-exchange rates. The physical origin of the temperature plateau is outlined. Predictions are then compared with T~Tauri star observations, with emphasis on the necessity of suitable beam convolution. Jet widths and variations in line profiles with distance and line tracer are well reproduced. However, predicted maximum velocities are too high, total densities too low, and the low-velocity [OI] component is too weak. Denser, slower MHD winds from warm disks might resolve these discrepancies.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Atomic T Tauri disk winds heated by ambipolar diffusion does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Atomic T Tauri disk winds heated by ambipolar diffusion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Atomic T Tauri disk winds heated by ambipolar diffusion will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-424107

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.