[52.03] EUV and Soft X-ray Probes of the Accretion and Coronae in T Tauri Stars

AAS 200th meeting, Albuquerque, NM, June 2002
Session 52. The Future of Extreme Ultraviolet Astronomy
Topical Session Oral, Wednesday, June 5, 2002, 8:30-10:00am, 10:45am-12:30pm, 2:30-4:00pm, 4:15-6:00pm, Morning in Ballroom A, Afternoon in Ballroom B

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[52.03] EUV and Soft X-ray Probes of the Accretion and Coronae in T Tauri Stars

F.M. Walter (Stony Brook University)

The classical T Tauri stars are complex systems, consisting of a star, a circumstellar disk, and mass infall and outflow. In the UV, EUV, and soft X-ray spectral regions the emissions probe an apparently solar-like stellar chromosphere and corona as well as the mass accretion. I shall review the current models for T Tauri stars, supported with recent spectral observations from the HST, FUSE, and XMM. The EUV is the region of choice for investigating the mass accretion, because models predict a 10⁵-10⁶K shock. Unfortunately, no classical T Tauri star has been detected in the EUV because of interstellar and circumstellar extinction. Therefore, I shall concentrate on how hard EUV (soft X-ray) emission can be diagnostic of the environments of the extreme classical T Tauri stars, and shall suggest some requirements for future EUV/soft X-ray missions.

The author(s) of this abstract have provided an email address for comments about the abstract: fwalter@astro.sunysb.edu

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