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Abundances of trace constituents in Jupiter's atmosphere inferred from Herschel/PACS observations by Gapp, Cyril; Rengel, Miriam; Hartogh, Paul; Sagawa, Hideo; Feuchtgruber, Helmut; Lellouch, Emmanuel; Villanueva, Geronimo L. is a scholarly article available to read on EtoBox.

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$Context.$ On October 31, 2009, the Photodetector Array Camera and Spectrometer (PACS) on board the Herschel Space Observatory observed far-infrared spectra of Jupiter between 50 and 220$\,\mu$m as part of the program "Water and Related Chemistry in the Solar System". $Aims.$ We investigate the disk-averaged chemical composition of Jupiter's atmosphere as a function of height using these observations. $Methods.$ We used the Planetary Spectrum Generator (PSG) and the least-squares fitting technique to infer the abundances of trace constituents. $Results.$ The PACS data include numerous spectral lines attributable to ammonia (NH$_3$), methane (CH$_4$), phosphine (PH$_3$), water (H$_2$O), and deuterated hydrogen (HD) in the Jovian atmosphere. We infer an ammonia abundance profile that decreases from a mole fraction of $(1.7\pm 0.8)\times 10^{-4}$ at $p\sim 900\,$mbar to $(1.7\pm 0.9)\times 10^{-8}$ at $p\sim 275\,$mbar, following a fractional scale height of about 0.114. For phosphine, we find a mole fraction of $(7.2\pm 1.2)\times 10^{-7}$ at pressures higher than $(550\pm 100)\,$mbar and a decrease of its abundance at lower pressures following a fractional scale height of $(0.09\pm

Author

Gapp, Cyril; Rengel, Miriam; Hartogh, Paul; Sagawa, Hideo; Feuchtgruber, Helmut; Lellouch, Emmanuel; Villanueva, Geronimo L.

Published

2024

Language

EN