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Infrared spectroscopy of T Tauri stars
The hydrogen-sodium diagnostic method is applied to a sample of 134 TTauri stars of low luminosity, and the luminosity of Pa-beta, Br-gamma,and Br-alpha are measured. This method permits the physical conditionsin the inner regions of winds to be determined with useful accuracy. Theresults 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 solarmass/yr, is populated by several luminous T Tauri stars. It seems likelythat the ejection of cold and neutral atomic winds represents a commonphase of the premain sequence evolution of low-mass stars.
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Observation and Astrometry data
| Constellation: | Perseus |
| Right ascension: | 04h40m05.15s |
| Declination: | +39°47'18.4" |
| Apparent magnitude: | 7.205 |
| Distance: | 198.807 parsecs |
| Proper motion RA: | 31.5 |
| Proper motion Dec: | -24.9 |
| B-T magnitude: | 9.223 |
| V-T magnitude: | 7.372 |
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