Abstract: CINE is a command-line tool for calculating infrared pumping efficiencies that
can be applied to the most common molecules found in cometary comae such as
water, hydrogen cyanide or methanol. One of the main mechanisms for molecular
excitation in comets is the fluorescence by the solar radiation followed by
radiative decay to the ground vibrational state. This code calculates the
effective pumping rates for rotational levels in the ground vibrational state
scaled by the heliocentric distance of the comet. These coefficients are
useful for modeling rotational emission lines observed in cometary spectra at
sub-millimeter wavelengths. Combined with computational methods to solve the
radiative transfer equations based, e.g., on the Monte Carlo algorithm, this
model can retrieve production rates and rotational temperatures from the
observed emission spectrum.
Credit: de Val-Borro, Miguel; Cordiner, Martin A.; Milam, Stefanie N.; Charnley, Steven B.
Preferred citation method: 2017JOSS.2017..182D