Lithium abundances of halo dwarfs based on excitation temperature. I. LTE

Understand

The discovery of the Spite plateau in the abundances of 7Li for metal-poor stars led to the determination of an observationally deduced primordial lithium abundance.

• However, after the success of the Wilkinson Microwave Anisotropy Probe (WMAP) in determining the baryon density, OmegaBh^2, there was a discrepancy between observationally determined and theoretically determined abundances in the case of 7Li.
• One of the most important uncertain factors in the calculation of the stellar 7Li abundance is the effective temperature, Teff.
• We use sixteen metal-poor halo dwarfs to calculate new Teff values using the excitation energy method.