Resolving the forbidden-line emission regions of young stellar objects - DD Tauri

Details Resolving the forbidden-line emission regions of young stellar objects - DD Tauri Resolving the forbidden-line emission regions of young stellar objects - DD Tauri

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...397l.107g&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 397, no. 2, p. L107-L110.

Astronomy and Astrophysics

Astrophysics

4

Emission Spectra, Forbidden Transitions, Line Spectra, Pre-Main Sequence Stars, Spatial Resolution, Star Formation, Charge Coupled Devices, Interstellar Matter, Stellar Winds

Scientific paper

We present high spatial resolution, narrow-band images of the T Tauri star, DD Tau, obtained with the High-Resolution Camera of CFHT. We have resolved the forbidden line emission region (FLER) of this source, on a spatial scale 0.5 arcsec in both forbidden N II and forbidden S II. The bulk of the continuum emission is concentrated in two knots that are separated by 0.55 arcsec (77 AU) and oriented in the direction P.A. = 6.4 deg. The forbidden-line morphology is distinctly different from that of the continuum. The forbidden N II emission appears to be a 'jetlike' extension connecting the two continuum knots. The forbidden S II emission seems to be confined to the northern knot. The southern knot (DD Tau B) is extended in the direction P.A. about 130 deg. The orientation of the disk as defined by IR polarization measurements is P.A. about 125 deg. We compare our observations with the existing theoretical models for the origin of FLERs.

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