Astron. Astrophys. Suppl. Ser.
Volume 142, Number 1, February II 2000
|Page(s)||85 - 94|
|Published online||15 February 2000|
Recombination coefficients for CII lines*
Department of Physics, Montana State University, Bozeman, MT 59717-3840, U.S.A.
2 Department of Physics and Astronomy, University College London, Gower St., London, WC1E 6BT, UK e-mail: email@example.com, firstname.lastname@example.org
Send offprint request to: P.J. Storey
Accepted: 4 October 1999
Effective recombination coefficients are given for CII transitions between doublet states. The calculations are carried out in the temperature range and for an electron density of 104 cm-3. 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 angular momentum . 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
Tables 1–5 are also available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (22.214.171.124) or via http://cdsweb.u-strasbg.fr/Abstract.html
© European Southern Observatory (ESO), 2000