Measurements of the velocity and width of the H2 2.1 micron emission line from the Orion Nebula

Details Measurements of the velocity and width of the H2 2.1 micron emission line from the Orion Nebula Measurements of the velocity and width of the H2 2.1 micron emission line from the Orion Nebula

Dec 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...226l..91s&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 226, Dec. 1, 1978, p. L91-L94. Research supported by the Wisconsin A

Astronomy and Astrophysics

Astrophysics

8

H Lines, Infrared Spectra, Nebulae, Orion Constellation, Spectral Line Width, Emission Spectra, Interstellar Gas, Velocity Measurement

Scientific paper

Observations were made of the 2.121-micron 1-0 S(1) emission line of H2 from the direction of the Orion Nebula, using a Fabry-Perot spectrometer which had a velocity resolution of 11 km/s. The line was found to have a centroid velocity of plus 9.3 plus or minus 1.5 km/s with respect to the local standard of rest and a FWHM of 12.9 plus or minus 4.1 km/s. There are no obvious indications of line splitting. These measurements put significant constraints on various models for the origin of the H2 emission.

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