Results from high-resolution spectral analyses of a selected sample of CH stars are presented .
Detailed chemical composition studies of these objects , which could reveal abundance patterns that in turn provide information regarding nucleosynthesis and evolutionary status , are scarce in the literature .
We conducted detailed chemical composition studies for these objects based on high resolution ( R { \sim } 42 000 ) spectra .
The spectra were taken from the ELODIE archive and cover the wavelength range from 3900 Å , to 6800 Å , in the wavelength range .
We estimated the stellar atmospheric parameters , the effective temperature T _ { eff } , the surface gravity log g , and metallicity [ Fe/H ] from Local thermodynamic equilibrium analyses using model atmospheres .
Estimated temperatures of these objects cover a wide range from 4550 K to 6030 K , the surface gravity from 1.8 to 3.8 and metallicity from - 0.18 to - 1.4 .
We report updates on elemental abundances for several heavy elements and present estimates of abundance ratios of Sr , Y , Zr , Ba , La , Ce , Pr , Nd , Sm , Eu and Dy with respect to Fe .
For the object HD 188650 we present the first abundance analyses results based on a high resolution spectrum .
Enhancements of heavy elements relative to Fe , that are characteristic of CH stars are evident from our analyses for most of the objects .
A parametric model based study is performed to understand the relative contributions from the s- and r-processes to the abundances of the heavy elements .