T Tauri stars through the looking-glass

Details T Tauri stars through the looking-glass T Tauri stars through the looking-glass

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985msngr..42...20f&link_type=abstract

ESO Messenger (ISSN 0722-6691), Dec. 1985, p. 20-24.

Physics

3

Hertzsprung-Russell Diagram, Line Spectra, Stellar Spectrophotometry, T Tauri Stars, Calibrating, Charge Coupled Devices, Emission Spectra, Spectrograms

Scientific paper

It is pointed out that the Caspec on the 3.6 m telescope is a very powerful new instrument for high dispersion spectroscopy. It has been used to obtain optical information on a number of T Tauri stars, taking into account calibrated resolved full spectral coverage. Seven low to intermediately active T Tauri stars from the spectral catalog of Appenzeller et al. (1983) have been selected. Two different spectrographs have been used concurrently, including the ESO echelle spectrograph with CCD (Caspec) at the 3.6 m telescope and the IDS at the 1.5 m telescope. It was attempted to cover the most important lines of Ca II and hydrogen along with photospheric lines of all strengths. Attention is also given to details of data processing, line ratios, absolute line and continuum fluxes, the study of chromospheric structure, and a schematic representation of the Eddington-Barbier relation in a spectral line.

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