Direct Observations of Cold Molecular Hydrogen with Infrared Heterodyne Spectroscopy

Details Direct Observations of Cold Molecular Hydrogen with Infrared Heterodyne Spectroscopy Direct Observations of Cold Molecular Hydrogen with Infrared Heterodyne Spectroscopy

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009eimw.confe..34k&link_type=abstract

"The Evolving ISM in the Milky Way and Nearby Galaxies, The Fourth Spitzer Science Center Conference, Proceedings of the confere

Astronomy and Astrophysics

Astrophysics

Infrared: Ism, Techniques: Spectroscopic, Line: Profiles, Ism: Abundances, Kinematics And Dynamics

Scientific paper

Direct observations of molecular hydrogen (H_2) in the cold interstellar medium (ISM) and in the atmospheres of the giant planets are feasible with the Cologne Tuneable Heterodyne Infrared Spectrometer (THIS). Molecular hydrogen is the most abundant molecule in space and it plays a major role in many elementary astrophysical processes. Infrared heterodyne spectroscopy is the only tool to investigate cold H_2 in the ISM in absoprtion against warm background sources with ultra high spectral resolution. The fully resolved line profiles will give unique insights to the kinematics allowing to deduce the three-dimensional structure of the distribution of molecular hydrogen. In addition, H_2 can be a tool to investigate Jovian oscillations by identifying Doppler shift variations to reveal the inner structure of Jupiter. Fully resolved H_2 emission lines can also be used to determine temperature profiles of the giant planets' atmospheres.

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