Singh, P. D.Andreazza, C. M.2014-02-262014-05-202014-02-262014-05-202000-07-01Astrophysical Journal. Bristol: Iop Publishing Ltd, v. 537, n. 1, p. 261-263, 2000.0004-637Xhttp://hdl.handle.net/11449/24787Rate coefficients for direct radiative association of carbon and nitrogen atoms to form CN, and of carbon ions and nitrogen atoms to form CN+ ions, are calculated for temperatures in the range of 300 to 14,700 K. For the CN molecule, the rate coefficients can be represented by the standard expression, k(CN)(T) = 7.87 x 10(-19)(T/300)(0.056) exp (-96.0/T) cm(3) s(-1) for temperatures between 300 and 2700 K and k(CN)(T) = 1.37 x 10(-18)(T/300)-0.128 exp (-520.1/T) cm(-3) s(-1) at T > 2700 K. For the CN+ ion, the corresponding expression is k(CN+)(T) = 1.08 x 10(-18)(T/300)(0.071) exp (-57.5/T) cm(-3) s(-1) for the temperature range studied. Calculated rate coefficients k(CN) are about 2 orders of magnitude lower than the canonical value used in the modeling of the chemistry of various astrophysical environments.261-263engatomic processesISM : moleculesmolecular processesArtigo10.1086/309023WOS:000088371000023Acesso restrito6915586041935129