T Tauri Stars: Physical Parameters and Evolutionary Status

Abstract

Long-term homogeneous photometry for 35 classical T Tauri stars (cTTS) in the Taurus-Auriga star-forming region (Tau-Aur SFR) has been analyzed. Reliable effective temperatures, interstellar extinctions, luminosities, radii, masses, and ages have been determined for these cTTS. The physical parameters and evolutionary status of 35 cTTS from this work and 34 weak-line T Tauri stars (wTTS) from previous studies have been compared. The luminosities, radii, and rotation periods of low-mass (0.3-1.1 Msun) cTTS are shown to be, on average, greater than those of low-mass wTTS, in good agreement with the evolutionary status of these two subgroups. The mean age of the younger subgroup of wTTS from our sample (2.3 Myr) essentially coincides with the mean duration of the protoplanetary disk accretion phase (2.3 Myr) for a representative sample of low-mass stars in seven young stellar clusters. The accretion disk dissipation time scale for the younger subgroup of cTTS (age less 4 Myr) in the Tau-Aur SFR is shown to be no greater than 0.4 Myr, in good agreement with the short protoplanetary disk dissipation time scale that is predicted by present-day protoplanetary disk evolution models.

18 pages, 8 figures

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Cited by in corpus (9)

• The detectability of radio emission from exoplanets
• Measuring the magnetic field of young stars using iSHELL observations: BP Tau and V347 Aur
• Star-disk interactions in multi-band photometric monitoring of the classical T Tauri star GI Tau
• Discovery of a mid-infrared protostellar outburst of exceptional amplitude
• Stability of Polycyclic Aromatic Hydrocarbon Clusters in Protoplanetary Disks
• Is T Tauri North a 'Classical' T Tauri star?
• Flares of accretion activity of the 20 Myr old UXOR RZ Psc
• Jet from the enigmatic high-latitude star BP Psc and evolutionary status of its driving source
• Variability of the DG Tau Forbidden Emission Line Low Velocity Component