SIMBAD references

As the chemical abundance values of normal A stars overlap those of incipient and moderate Am stars, we examine the abundance anomalies of the Am and superficially normal A stars together. We study the results of 17 consistently performed studies by Adelman and his associates who used Dominion Astrophysical Observatory long camera spectra obtained using Reticon and CCD detectors. A linear correlation analysis of the abundance anomalies of 12 elements derived in all 17 cohort stars shows many of these anomalies are correlated with one another especially those of the Fe-peak elements, Sr, Y, Zr and Ba. This most likely reflects hydrodynamic processes such as radiative diffusion and gravitation acting within the stellar atmospheres and envelopes.