We present an analysis of elemental abundances of ejecta of the recurrent nova RS Oph using published optical and near-infrared spectra during the 2006 outburst .
We use the CLOUDY photoionization code to generate synthetic spectra by varying several parameters , the model generated spectra are then matched with the observed emission line spectra obtained at two epochs .
We obtain the best fit model parameters through the \chi ^ { 2 } minimization technique .
Our model results fit well with observed optical and near-infrared spectra .
The best-fit model parameters are compatible with a hot white dwarf source with T _ { BB } of 5.5 - 5.8 \times 10 ^ { 5 } K and roughly constant a luminosity of 6 - 8 \times 10 ^ { 36 } ergs s ^ { -1 } .
From the analysis we find the following abundances ( by number ) of elements with respect to solar : He/H = 1.8 \pm 0.1 , N/H = 12.0 \pm 1.0 , O/H = 1.0 \pm 0.4 , Ne/H = 1.5 \pm 0.1 , Si/H = 0.4 \pm 0.1 , Fe/H = 3.2 \pm 0.2 , Ar/H = 5.1 \pm 0.1 , and Al/H = 1.0 \pm 0.1 , all other elements were set at the solar abundance .
This shows the ejecta are significantly enhanced , relative to solar , in helium , nitrogen , neon , iron and argon .
Using the obtained parameter values , we estimate an ejected mass in the range of 3.4 - 4.9 \times 10 ^ { -6 } M _ { \odot } which is consistent with observational results .