Astronomers fix a key error in measuring the Sun's silver

Key Points:

• Researchers have recalculated the Sun’s silver abundance, finding it about 55% higher than previous estimates used over the past decade, resolving a long-standing mismatch between solar and meteoritic silver levels.
• The revision stems from improved atomic modeling that accounts for non-equilibrium conditions in the Sun’s atmosphere, showing that earlier assumptions underestimated silver by treating atomic populations as balanced.
• This updated model includes detailed calculations of silver atom energy levels and interactions, as well as accounting for overlapping spectral lines from other elements, leading to more accurate measurements of silver absorption features.
• The new findings bring the solar silver abundance much closer to that found in primitive meteorites, supporting the idea that the Sun and meteorites share a common chemical origin without requiring exotic processes to explain previous discrepancies.
• The study provides correction tables for other stars and suggests that silver abundance measurements in older stars may also need revision, impacting our understanding of neutron-capture processes and the chemical evolution of the Galaxy.