The Submillimeter Spectrum of Glycolaldehyde from 500 GHz to 1.2 THz

Details The Submillimeter Spectrum of Glycolaldehyde from 500 GHz to 1.2 THz The Submillimeter Spectrum of Glycolaldehyde from 500 GHz to 1.2 THz

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010mss..confetj14c&link_type=abstract

"International Symposium On Molecular Spectroscopy, 65th Meeting, Held 21-25 June, 2010 at Ohio State University. http://molspec

Astronomy and Astrophysics

Astronomy

Astronomical Species And Processes

Scientific paper

Glycolaldehyde is the simplest α-hydroxy aldehyde and the only sugar-related molecule definitively detected in the interstellar medium to date. Previous spectral studies have reported its rotational spectrum up to ˜350 GHz. With the advent of several new submillimeter and THz astronomy facilities equipped with high-resolution spectrometers, it is important to begin collecting and analyzing higher frequency spectra for all known interstellar molecules. We have acquired the submillimeter/THz direct absorption spectrum of glycolaldehyde from 520 -- 600 GHz and from 1.1 -- 1.2 THz. The spectra were measured at JPL using a 3-meter static cell in double-pass configuration. The submillimeter radiation was generated using a standard microwave frequency synthesizer coupled with cascaded frequency multipliers. A Schottky diode detector was used during acquisition of the lower frequency spectra, and an Si hot electron bolometer detector was used for scans above 1 THz. The analysis of these spectra is underway, and new line assignments are being combined with the assignments from previous studies to determine a global spectral fit. The details of the experiment and progress on the spectral analysis will be reported.
Marstokk, K. M.; Mollendal, H., J. Mol. Struct., 5, 205-213 (1970).
Widicus Weaver, S. L. et al., Astrophys. J. Suppl., 158, 188-192 (2005).

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