The Origin of Jets from Young Stars: Steady State Disk Wind Models Confronted to Observations |
| |
Authors: | Catherine Dougados Sylvie Cabrit Jonathan Ferreira Nicholas Pesenti Paulo Garcia Darren O'brien |
| |
Affiliation: | 1. Laboratoire d'Astrophysique de Grenoble, France 2. Observatoire de Paris, France 3. Laboratoire d'Astrophysique de Grenoble, France 4. University of Porto, Portugal
|
| |
Abstract: | We discuss in this contribution constraints on the origin of mass-loss from young stars brought by recent observations at high angular resolution (0.1″ = 14 AU) of the inner regions of winds from T Tauri stars. Jet widths and collimation scales, the large extent of the velocity profile as well as the detection of rotation signatures agree with predictions from extended (R e ≥ 1 AU) magneto-centrifugal disk wind ejection models. Detected poloidal and toroidal velocities imply large ejection efficiencies (ξ ? 0.05, λ ? 10), suggesting that thermal gradients (originating in an accretion heated disk corona for example) play an important role in accelerating the flow. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|