The cosmological density of baryons from observations of 3He+ in the Milky Way

@article{Bania2002TheCD,
  title={The cosmological density of baryons from observations of 3He+ in the Milky Way},
  author={T. M. Bania and Robert T. Rood and Dana. S. Balser},
  journal={Nature},
  year={2002},
  volume={415},
  pages={54-57}
}
Primordial nucleosynthesis after the Big Bang can be constrained by the abundances of the light elements and isotopes 2H, 3He, 4He and 7Li (ref. 1). The standard theory of stellar evolution predicts that 3He is also produced by solar-type stars, so its abundance is of interest not only for cosmology, but also for understanding stellar evolution and the chemical evolution of the Galaxy. The 3He abundance in star-forming (H II) regions agrees with the present value for the local interstellar… Expand

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