Propane on Titan

Details Propane on Titan Propane on Titan

2003-09-23

arxiv.org/abs/astro-ph/0309653v1

Astrophys.J.597:L65-L68,2003

Astronomy and Astrophysics

Astrophysics

accepted to ApJL 18 September 2003; See also: http://www.gps.caltech.edu/~hroe/propane2003/

Scientific paper

10.1086/379816

We present the first observations of propane (C$_3$H$_8$) on Titan that unambiguously resolve propane features from other numerous stratospheric emissions. This is accomplished using a $R=\lambda/\delta\lambda\approx10^5$ spectrometer (TEXES) to observe propane's $\nu_{26}$ rotation-vibration band near 748 cm$^{-1}$. We find a best-fit fractional abundance of propane in Titan's stratosphere of $(6.2\pm1.2)\times10^{-7}$ in the altitude range to which we are sensitive (90-250 km or 13-0.24 mbar).

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