Abstract
The dual axion model (DAM), yielding both dark matter and darkenergy forming a Peccei–Quinn-like scalar field solving the strongCP problem, is known to allow a fair fit of cosmic microwave background (CMB) data.Recently, however, it was shown that its transfer function exhibits significant anomalies,causing difficulties for fitting deep galaxy sample data. Here we show how the DAM can bemodified to agree with the latter data set. The modification follows the pattern suggestedfor reconciling any Peccei–Quinn-like approach with gravity. The modified DAM allowsprecise predictions which could be tested against future CMB and/or deep sampledata.
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