Forbidden lines from T Tauri disk winds. I. High magnetic torque models

Details Forbidden lines from T Tauri disk winds. I. High magnetic torque models Forbidden lines from T Tauri disk winds. I. High magnetic torque models

Mar 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26a...343l..61c&link_type=abstract

Astronomy and Astrophysics, v.343, p.L61-L64 (1999)

Astronomy and Astrophysics

Astrophysics

42

Accretion, Accretion Disks, Line: Profiles, Magnetohydrodynamics (Mhd), Stars: Pre-Main Sequence, Ism: Jets And Outflows

Scientific paper

We present synthetic emission maps and long-slit spectra in the [O i]6300 and [S ii]6731 lines for self-similar, cold MHD disk winds of high magnetic torque. We find that such models produce both a dense, compact low-velocity component (LVC) and a lower density, collimated high-velocity component (HVC) sharing several observed properties of jets from T Tauri stars (resolved transverse sizes, strong apparent acceleration in [O i], larger spatial displacement and lower gradients in [S ii]). Hence, the LVC and HVC observed in TTS might be formed in two distinct regions of the same wind. We suggest that disk wind models with lower ratio of magnetic to viscous torque and significant coronal heating at the wind base could compare even more favorably with the observations.

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