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Wednesday 19 Apr 2017Diagnostics of emitting regions in the young stars with the help of interferometry and spectroscopy

L.V. Tambovtseva - Pulkovo Observatory

Physics, 4th Floor 14:00-15:00

Different components of the circumstellar environment of young stars may contribute to the hydrogen line emission.
These are a magnetosphere, disk wind, and gaseous accretion disk. We performed non-LTE modelling to reveal a role
of all these components in the formation of emission spectra. Solving this task, we determine a geometrical structure of
these regions and their physical properties. A special progress has been made when we undertook a simultaneous
reproduction of the line profiles and interferometric observables obtained with VLTI/AMBER for intermediate-mass Herbig AeBe stars.
Using such modeling, we collected statistic data for a sample of these stars allowing us to find interesting links between stellar
and model parameters. It turned out that interferometry strongly constrained the model arbitrariness and helped to obtain the reliable results.
We discuss common and different features of the vicinity of T Tauri and Herbig AeBe stars.

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