The ionisation state of PAHs in interstellar environments.
E. Dartois, L. D'Hendecourt;
AaA, 1997, 323, 534
ABSTRACT:We present an ionisation model for Polycyclic Aromatic Hydrocarbon (PAH) molecules from which we determine the various size dependant
ionisation states expected in different space environments.
Maps of ionisation
regimes are derived.
They allow the estimate of the ionisation fraction of PAH
for any given set of parameters (electron density, flux factor and
temperature) assuming a typical PAH size of 50 carbon atoms.
Moreover, a particular
astronomical case is considered: the variation in ionisation states with depth in a
typical dense cloud illuminated by a bright B1.5V star.
KEYWORDS: molecular data, molecular processes, ism: molecules, ism: general
PERSOKEY:dust, pah, ,
CODE: dartois97