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New laboratory techniques using heterodyne receivers

Published online by Cambridge University Press:  12 October 2020

Nadine Wehres Open the ORCID record for Nadine Wehres [Opens in a new window] ,
Kirill Borisov ,
Katharina von Schoeler ,
Patrick Pütz ,
Cornelia Honingh ,
Frank Lewen  and
Stephan Schlemmer
Nadine Wehres
Affiliation:
I. Physics Institute, University of Cologne, Zülpicher Strasse 77, 50937 Köln, Germany email: wehres@ph1.uni-koeln.de
Kirill Borisov
Affiliation:
I. Physics Institute, University of Cologne, Zülpicher Strasse 77, 50937 Köln, Germany email: wehres@ph1.uni-koeln.de
Katharina von Schoeler
Affiliation:
I. Physics Institute, University of Cologne, Zülpicher Strasse 77, 50937 Köln, Germany email: wehres@ph1.uni-koeln.de
Patrick Pütz
Affiliation:
I. Physics Institute, University of Cologne, Zülpicher Strasse 77, 50937 Köln, Germany email: wehres@ph1.uni-koeln.de
Cornelia Honingh
Affiliation:
I. Physics Institute, University of Cologne, Zülpicher Strasse 77, 50937 Köln, Germany email: wehres@ph1.uni-koeln.de
Frank Lewen
Affiliation:
I. Physics Institute, University of Cologne, Zülpicher Strasse 77, 50937 Köln, Germany email: wehres@ph1.uni-koeln.de
Stephan Schlemmer
Affiliation:
I. Physics Institute, University of Cologne, Zülpicher Strasse 77, 50937 Köln, Germany email: wehres@ph1.uni-koeln.de
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Abstract

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Two laboratory emission spectrometers have been designed and described previously. Here, we present a follow-up study with special focus on absolute intensity calibration of the new SURFER-spectrometer (SUbmillimeter Receiver For Emission spectroscopy of Rotational transitions), operational between 300 and 400 GHz and coincident with ALMA (Atacama Large Millimeter/submillimeter Array) Band 7.

Furthermore, we present a feasibility study to extend the detection frequencies up to 2 THz. First results have been obtained using the SOFIA (Stratospheric Observatory for IR Astronomy) upGREAT laboratory setup which is located at the University of Cologne. Pure rotational spectra of the complex molecule vinyl cyanide have been obtained and are used to give an estimate on the sensitivity to record ro-vibrational transitions of molecules with astrophysical importance at 2 THz.

Keywords

methods: laboratorytechniques: spectroscopymolecular processesabsolute intensities
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S350: Laboratory Astrophysics: From Observations to Interpretation , April 2019 , pp. 41 - 45
Copyright
© International Astronomical Union 2020

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