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HD 29458


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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:ペルセウス座
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

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 29458
TYCHO-2 2000TYC 2897-284-1
USNO-A2.0USNO-A2 1275-03567516
HIPHIP 21738

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