3 papers
astro-ph2001
Observations of T-Tauri Stars using HST-GHRS: II. Optical and Near UV lines
David R. Ardila, Gibor Basri, Frederick M. Walter +2
We have analyzed GHRS data of eight Classical T Tauri stars (CTTSs) and one Weak T Tauri star (WTTS). The GHRS data consist of an spectral range 40 A wide centered on 2800 A. For 4…
astro-ph2000
AB Dor in '94: I. HST/GHRS Observations of the Quiescent Chromosphere of an Active Star
J. C. Brandt, S. R. Heap, F. M. Walter +15
We analyze HST/GHRS spectra of AB Doradus, the prototypical ultra-rapidly rotating K dwarf. We observed chromospheric (Mg II) and transition region (C II, Si IV, C IV, and N V) lin…
astro-ph1999
The low mass stellar population of the Orion OB1 association and implications for the formation of low mass stars
F. M. Walter, J. M. Alcala, R. Neuhaeuser +2
The OB associations, which are fossil star formation regions, retain the end-products of the star formation process in an open, unobscured environment. Observations of the low mass…