Mass loss in T Tauri stars - Observational studies of the cool parts of their stellar winds and expanding shells

Abstract

view Abstract Citations (142) References (57) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Mass loss in T Tauri stars : observational studies of the cool parts of their stellar winds and expanding shells. Mundt, R. Abstract Extensive high-resolution and high signal-to-noise line profile measurements of 23 T Tauri stars are presented. Those stars showing indications for mass loss in the Na D lines were observed in H-alpha and Ca II K as well. Mass loss in these stars is found to be often indicated in the Na D lines by rather sharp blueshifted absorption lines. The observed line profiles strongly suggest that, at least in some stars, the winds are already accelerated to 150-350 km/s within 1.1-1.5 stellar radii. For the narrow, blueshifted Na D absorptions, two formation regions are discussed: (1) the distant, cold parts of the stellar wind, and (2) a stellar wind-driven shell. The descending material occasionally observed in some T Tauri stars is interpreted to be infalling matter recently ejected by these stars, and not matter left over from the star formation process. Publication: The Astrophysical Journal Pub Date: May 1984 DOI: 10.1086/162048 Bibcode: 1984ApJ...280..749M Keywords: Pre-Main Sequence Stars; Stellar Evolution; Stellar Mass Ejection; Stellar Spectra; Stellar Winds; T Tauri Stars; Absorption Spectra; H Alpha Line; Radial Velocity; Signal To Noise Ratios; Astrophysics full text sources ADS | data products SIMBAD (12)