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MO: Fachverband Molekülphysik
MO 8: Poster 1
MO 8.14: Poster
Tuesday, March 15, 2022, 16:30–18:30, P
Chirped-pulse millimeter wave spectroscopy on complex molecules of astrophysical interest — •Bettina Heyne, Marius Hermanns, Nadine Wehres, Frank Lewen, and Stephan Schlemmer — 1. Physikalisches Institut, Universität zu Köln, Deutschland
We present our chirped-pulse Fourier transform millimeter wave spectrometer [1], which is operational between 75 and 110 GHz. This range overlaps with the Atacama Large Millimeter/Submillimeter Array (ALMA) Band 3. The instrument is designed to achieve high stability and sensitivity, which makes it possible to measure spectra of isotopic species of molecules in natural abundance. The principle setup coincides in many aspects with our emission spectrometer [2], thus a comparison of chirped pulse measurements and emission spectroscopy is discussed briefly. Furthermore, a high voltage DC discharge in combination with a supersonic jet is incorporated to observe fragments of molecules. For this application, first tests were performed with methyl cyanide (CH3CN) as a precursor molecule. We observed HCN as well as HNC discharge products.
References
[1] M. Hermanns, N. Wehres, B. Heyne, K. von Schoeler, G. Neplyakh, M. Töpfer, C. E. Honingh, U. U. Graf and S. Schlemmer, in preparation
[2] N. Wehres, B. Heyne, F. Lewen, M. Hermanns, B. Schmidt, C. Endres, U. U. Graf, D. R. Higgins and S. Schlemmer, IAU Symposium, 2018, pp. 332-345