SIMBAD references

New abundances for the elements calcium to mercury are measured for the brightest member of the spectroscopic binary HD 1909 using updated atomic data and spectrum synthesis. Manganese is overabundant by a unusually high factor (80 ⊙). While strontium is underabundant, yttrium and zirconium are very overabundant by factors of 250 and 500 times the solar abundances. Barium is overabundant by a factor of 20. The strongest lines of the twice ionized lanthanides Pr III and Nd III are not present which suggests the abundances of these two elements are solar or less. The Hg II line at 3983.93 Å is unusually strong and reproduced by a mercury overabundance of a factor of 500,000 times the solar mercury abundance.