Bayesian Estimation of the D(p,γ)3He Thermonuclear Reaction Rate

Big bang nucleosynthesis (BBN) is the standard model theory for the production of light nuclides during the early stages of the universe, taking place about 20 minutes after the big bang. Deuterium production, in particular, is highly sensitive to the primordial baryon density and the number of neutrino species, and its abundance serves as a sensitive test for the conditions in the early universe. The comparison of observed deuterium abundances with predicted ones requires reliable knowledge of the relevant thermonuclear reaction rates and their corresponding uncertainties. Recent observations reported the primordial deuterium abundance with percent accuracy, but some theoretical predictions based on BBN are in tension with the measured values because of uncertainties in the cross section of the deuterium-burning reactions. In this work, we analyze the S-factor of the D(p,γ)3He reaction using a hierarchical Bayesian model. We take into account the results of 11 experiments, spanning the period of 1955–2021, more than any other study. We also present results for two different fitting functions, a two-parameter function based on microscopic nuclear theory and a four-parameter polynomial. Our recommended reaction rates have a 2.2% uncertainty at 0.8 GK, which is the temperature most important for deuterium BBN. Differences between our rates and previous results are discussed.

Sun Energy Is Electric, Neutron Stars Do Not Exist

Existing Astronomy stands on two completely false postulates: the first postulate is that the rotation of celestial bodies around their own axis occurs by inertia. The second postulate is that the Sun and the stars have Fusion Energy. In the article, using the formulations of discoveries with brief proofs, we consistently destroy these imaginary postulates and the consequences of these postulates. For example, if there is no thermonuclear reaction in the stars. This means that nothing burns out inside the star, and there is no reason and possibility for collapse, and there can be no consequences from collapse. And we offer new real foundations, alternative Energy. Based on the new established facts, it becomes clear in which cases celestial bodies do not rotate, and in which cases they rotate around their axis. In reality, only those bodies that have satellites rotate intensively around their axis. And these bodies, which have satellites, also have other important properties.