Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...367..173g&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 367, Jan. 20, 1991, p. 173-181. Research supported by ASI.
Astronomy and Astrophysics
Astrophysics
27
Infrared Spectroscopy, Interstellar Gas, Pre-Main Sequence Stars, Stellar Spectra, Stellar Winds, T Tauri Stars, Carbon Monoxide, H Lines, Interstellar Matter, Stellar Luminosity, Stellar Mass Ejection
Scientific paper
The hydrogen-sodium diagnostic method is applied to a sample of 134 T Tauri stars of low luminosity, and the luminosity of Pa-beta, Br-gamma, and Br-alpha are measured. This method permits the physical conditions in the inner regions of winds to be determined with useful accuracy. The results show that a restricted range of T(g), between 5000 and 7000 K, and of mass loss rate, between 10 to the -8th and 10 to the -7th solar mass/yr, is populated by several luminous T Tauri stars. It seems likely that the ejection of cold and neutral atomic winds represents a common phase of the premain sequence evolution of low-mass stars.
Gennari Sandro
Giovanardi Carlo
Natta Antonella
Stanga Ruggero
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