Astron. Astrophys. Suppl. Ser. 142, 85-94
Recombination coefficients for C ll lines
A.R. Davey 1
- P.J. Storey 2
- R. Kisielius 2
Send offprint request: P.J. Storey
1 - Department of Physics, Montana State University,
Bozeman, MT 59717-3840, U.S.A.
Department of Physics and Astronomy, University College London,
Gower St., London, WC1E 6BT, UK
e-mail: firstname.lastname@example.org, email@example.com
Received July 20; accepted October 4, 1999
Tables at the CDS
Copyright The European Southern Observatory (ESO)
Effective recombination coefficients are given for Cii transitions
between doublet states. The calculations are carried out in the temperature
and for an electron density of
. The effects of electron collisions on the excited states
are included. The necessary bound-bound and bound-free radiative data are
obtained from a new R-matrix calculation in which photoionization resonances
are fully delineated, thereby accurately incorporating the effects of both
radiative and dielectronic recombination. The R-matrix calculation includes
all bound states with principal quantum number
and total orbital
The effect of moving the resonance features to
their experimentally determined positions is also investigated and found to
be important at low temperatures.
Key words: atomic data -- line: formation -- Hii regions --
planetary nebulae: general
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