Recombination coefficients for C II lines
Abstract
Effective recombination coefficients are given for C II transitions between doublet states. The calculations are carried out in the temperature range 500  20 000; K and for an electron density of 10^{4} cm^{3}. The effects of electron collisions on the excited states are included. The necessary boundbound and boundfree radiative data are obtained from a new Rmatrix calculation in which photoionization resonances are fully delineated, thereby accurately incorporating the effects of both radiative and dielectronic recombination. The Rmatrix calculation includes all bound states with principal quantum number n <= 15 and total orbital angular momentum L <= 4. The effect of moving the resonance features to their experimentally determined positions is also investigated and found to be important at low temperatures. Tables 15 are also available in electronic form at the CDS via anonymous ftp to cdsarc.ustrasbg.fr (130.79.128.5) or via http://cdsweb.ustrasbg.fr/Abstract.html
 Publication:

Astronomy and Astrophysics Supplement Series
 Pub Date:
 February 2000
 DOI:
 10.1051/aas:2000139
 Bibcode:
 2000A&AS..142...85D
 Keywords:

 ATOMIC DATA;
 LINE: FORMATION;
 \ION{H}{II} REGIONS;
 PLANETARY NEBULAE: GENERAL