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A Hot Wind from the Classical T Tauri Stars: TW Hydrae and T Tauri | | A. K. Dupree
; N. S. Brickhouse
; Graeme H. Smith
; Jay Strader
; | | Date: |
2 May 2005 | | Journal: | Astrophys.J. 625 (2005) L131-L134 | | Subject: | astro-ph | | Affiliation: | CfA), N. S. Brickhouse (CfA), Graeme H. Smith (Lick Obs., UCSC), and Jay Strader (Lick Obs., UCSC | | Abstract: | Spectroscopy of the infrared He I (10830A) line with KECK/NIRSPEC and IRTF/CSHELL, and of the ultraviolet C III (977A) and O VI (1032A) emission with FUSE reveals that the classical T Tauri star TW Hydrae exhibits P Cygni profiles, line asymmetries, and absorption indicative of a continuous, fast (~400 km/s), hot (~300,000 K) accelerating outflow with a mass loss rate ~10^-11 - 10^-12 solar masses per year, or larger. Spectra of T Tauri N appear consistent with such a wind. The source of the emission and outflow seems restricted to the stars themselves. Although the mass accretion rate is an order of magnitude less for TW Hya than for T Tau, the outflow reaches higher velocities at chromospheric temperatures in TW Hya. Winds from young stellar objects may be substantially hotter and faster than previously thought. | | Source: | arXiv, astro-ph/0505037 | | Services: | Forum | Review | PDF | Favorites | |
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