The spatial distribution of excited H2 in T Tau: A molecular outflow in a young binary system

Details The spatial distribution of excited H2 in T Tau: A molecular outflow in a young binary system The spatial distribution of excited H2 in T Tau: A molecular outflow in a young binary system

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...287l..25v&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 287, no. 2, p. L25-L28

Astronomy and Astrophysics

Astrophysics

34

Binary Stars, Hydrogen Clouds, Interstellar Matter, Molecular Clouds, Molecular Excitation, Outlet Flow, Spatial Distribution, Stellar Systems, T Tauri Stars, Emission, Infrared Spectra, Morphology, Star Formation, Stellar Mass Ejection, Stellar Models

Scientific paper

Strong extended emission from molecular hydrogen in the upsilon = 1 to O S(1) transition is mapped around T Tau. In addition, the upsilon = 2 to 1 S(1) line is detected close to the star. The ratio of the two transitions is consistent with an excitation process in which both fluorescence by stellar ultraviolet radiation and collisions in a warm, dense medium play a role. The morphology is interpreted as emission from a molecular outflow which appears to wiggle as a result of the fact that T Tau is a binary system seen almost pole-on. It is shown that an outflow with a small opening angle can reproduce the observed extended emission. From comparison with previous studied it is argued that the molecular outflow originates from T Tau S, the infrared component. The presented model constrains the orientation and geometry of the system.

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