New sub-millimeter heterodyne observations of CO and HCN in Titan's atmosphere with the APEX Swedish Heterodyne Facility Instrument - Astrophysics > Earth and Planetary AstrophysicsReport as inadecuate




New sub-millimeter heterodyne observations of CO and HCN in Titan's atmosphere with the APEX Swedish Heterodyne Facility Instrument - Astrophysics > Earth and Planetary Astrophysics - Download this document for free, or read online. Document in PDF available to download.

Abstract: The origin of the atmosphere of the largest moon of Saturn, Titan, is poorlyunderstood and its chemistry is rather complicated. Ground-basedmillimeter-sub-millimeter heterodyne spectroscopy resolves line shapessufficiently to determine information in Titan-s atmospheric composition onvertical profiles and isotopic ratios. We test the capabilities of the SwedishHeterodyne Facility Instrument SHFI, Receiver APEX-1, together with theAtacama Pathfinder EXperiment APEX 12-m telescope for Titan-s atmosphericobservations. In particular we present sub-millimeter observations of theCO2-1 and HCN3-2 lines of the Titan stratosphere with APEX, and with SHFItaken during the Science Verification SV instrument phase on March and June2008. With the help of appropriate radiative transfer calculations weinvestigate the possibility to constrain the chemical concentrations andoptimize the performance of the APEX-1 instrument for inferring verticalprofiles of molecular components of the atmosphere of Titan.



Author: M. Rengel 1, H. Sagawa 2, P. Hartogh 1 1 Max-Planck-Institut fuer Sonnensystemforschung, 2 National Institute of Information and

Source: https://arxiv.org/







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