A case for nucleosynthesis in slowly evolving models

TL;DR

This paper argues that cosmological nucleosynthesis can occur in a universe with a linearly expanding scale factor, producing helium and deuterium consistent with observations, challenging standard cosmology assumptions.

Contribution

It introduces a model of nucleosynthesis in a linearly expanding universe, showing compatibility with observed elemental abundances and proposing a revised standard cosmology.

Findings

Helium abundance requires high baryon density near galactic cluster mass bounds.

Metallicity produced is close to the lowest observed in metal-poor stars.

Deuterium levels can be produced in star-forming environments consistent with observations.

Abstract

We present a case for Cosmological Nucleosynthesis in an FRW universe in which the scale factor expands linearly with time: $a(t) \sim t$. It is demonstrated that adequate amount of $^4He$ requires a baryon density that saturates mass bounds from galactic clusters. There is a collataral metallicity production that is quite close to the lowest metallicity observed in metal poor Pop II stars and clouds. On the other hand, sites for incipient low metallicity (Pop II) starformation can support environments conducive to Deuterium production up to levels observed in the universe. A profile of a revised ``Standard Cosmology'' is outlined.