Adaptive optics observations of molecular hydrogen towards T Tauri

Details Adaptive optics observations of molecular hydrogen towards T Tauri Adaptive optics observations of molecular hydrogen towards T Tauri

Jan 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997spie.3136..249q&link_type=abstract

Conference Paper, SPIE Proceedings, Vol. 3126, p. 249-256.

Physics

Optics

1

Adaptive Optics, Hydrogen, Electron Transitions, Stellar Mass Ejection, Stellar Mass Accretion, Accretion Disks, T Tauri Stars, Observatories

Scientific paper

We present images of the (v = 1-0) S(1) transition of molecular hydrogen at 2.121 microns towards T Tauri, observed with the SHARP II camera attached to the ADONIS adaptive optics system at ESO's 3.6-m telescope on La Silla, Chile. With an image scale of 0.1 arcsec per pixel, we could cover a field of 25 arcsec in each exposure. Positioning T Tauri successively in the four quadrants of the detector, we obtained a 35-arcsec mosaic centered on the star. In the 2.12-micron continuum, the 0.7-arcsec binary is easily resolved. In continuum-subtracted images in the emission line, we detect a very complex structure: strong emission at the position of the IR companion, a very bright knot 2-3 arscec northwest, three thin filaments, strong emission extending 10 arcsec south towards Burnham's nebula, and a faint arc 10 arcsec north. While the material north and south of the stars may be associated with an outflow, we argue that the knots and filaments may be shock-excited material in the equatorial plane. They could be either tidal tails caused by the interaction of the two star-disk systems (T Tau N and T Tau S), accretion streams from the inner edge of the circumbinary disk, or spiral shocks in this disk.

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