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Molecular ions in astrophysics

Evelyne Roueff1 and Eric Herbst2

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The chemical content of the interstellar medium has been drastically revised in the last two years with the discovery of negative ions at a significant level of abundance. We emphasize the chemical processes involved in the formation and depletion of anions and the need for new laboratory work to understand them better. In addition, we comment on the detection of the first fluorine ion, CF+, and on hydrocarbon chemistry, specifically the recent detection of propene and a study of deuterated methylacetylene isotopomers.


PACS

98.58.Ay Physical properties (abundances, electron density, magnetic fields, scintillation, scattering, kinematics, dynamics, turbulence, etc.)

34.80.Lx Recombination, attachment, and positronium formation

98.58.Bz Atomic, molecular, chemical, and grain processes

95.30.Ft Molecular and chemical processes and interactions

82.30.Lp Decomposition reactions (pyrolysis, dissociation, and fragmentation)

Subjects

Atomic and molecular physics

Chemical physics and physical chemistry

Astrophysics and astroparticles

Dates

Issue 1 (2009)



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