Astrophysics (Index)About

T-Tauri star

(TTS)
(type of variable pre-main-sequence star)

A T-Tauri star (TTS) is a variable star with certain specific emission lines (hydrogen, Ca II, Fe I, S II, O I, Li I), judged to be very young (pre-main-sequence star) dwarfs of about 2.5 solar mass or less. They often have protoplanetary disks and are near molecular clouds. Their energy is presumed to be from gravitation (Kelvin-Helmholtz mechanism) rather than fusion, the latter not yet triggered. They generally have a short rotation period in the range of 1-12 days.

Some subtypes:


(star type,variable,stellar evolution)
Further reading:
http://en.wikipedia.org/wiki/T_Tauri_star
http://www.astro.sunysb.edu/fwalter/TMP/ss2.ppt.pdf

Referenced by pages:
GG Tau
HL Tau
Lick Observatory Calcium Line Survey (LkCl)
Pico dos Dias Survey (PDS)
pre-main-sequence star (PMS)
protoplanetary disk (PPD)
protostar
stellar age determination
stellar association
stellar evolution
T association
T Tauri
TW Hydrae association (TWA)
TW Hydrae (TW Hya)
variable star

Index