VLT-ISAAC 3-5 mu m spectroscopy as a new tool for investigating H2 emission in protostellar jets

Details VLT-ISAAC 3-5 mu m spectroscopy as a new tool for investigating H2 emission in protostellar jets VLT-ISAAC 3-5 mu m spectroscopy as a new tool for investigating H2 emission in protostellar jets

Nov 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...379l..17g&link_type=abstract

Astronomy and Astrophysics, v.379, p.L17-L20 (2001)

Astronomy and Astrophysics

Astrophysics

6

Stars: Formation, Infrared: Ism: Lines, Ism: Jets And Outflows, Ism: Individual Objects: Vela Clouds

Scientific paper

We report 3-5 mu m IR spectroscopy obtained with VLT-ISAAC on the IRS17 molecular hydrogen jet in the Vela-D Molecular Cloud. Together with H2 emission lines from the v = 1 rovibrational state, the spectra show several pure rotational lines of the fundamental state with excitation temperature up to ~ 22 000 K. We show how theoretical rotation diagrams indicate these lines as unique both to probe the presence of collisionally excited gas in NLTE conditions and to infer the gas density.

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