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Titanium Oxide Kept Proxima's Long Clock
A molecular absorption index recovered an approximately 2,873-day activity period from HARPS spectra of Proxima Centauri.
Summary
A molecular absorption index recovered an approximately 2,873-day activity period from HARPS spectra of Proxima Centauri.
The analysis compares the strength of a titanium-oxide band near 567 nanometers with adjacent continuum in long-running HARPS spectroscopy. It finds a periodicity of 2,873 days, with an uncertainty of roughly plus 47 and minus 54 days, similar to activity periods inferred from other indicators. The paper presents the molecular index as a proxy for long-term stellar variation, not a new planet signal.
Why it matters
A molecular absorption index recovered an approximately 2,873-day activity period from HARPS spectra of Proxima Centauri.
Limits and context
- The paper presents the molecular index as a proxy for long-term stellar variation, not a new planet signal.
Key claims
A molecular absorption index recovered an approximately 2,873-day activity period from HARPS spectra of Proxima Centauri.
Qualification: The paper presents the molecular index as a proxy for long-term stellar variation, not a new planet signal.
Evidence: source-2026-08-15-007
Sources
- arXiv preprint 2608.12686arXiv · primary research
Corrections
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