We found a new type of stellar explosion that could explain a 13-billion-year-old mystery of the Milky Way’s elements

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Until recently it was thought neutron star mergers were the only way heavy elements (heavier than zinc) could be produced.

We found a new type of stellar explosion that could explain a 13-billion-year-old mystery of the Milky Way’s elements : Read more

 

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The article states, "The chemical composition of SMSS J2003-1142 can reveal the nature and properties of its parent star. Particularly important are its unusually high amounts of nitrogen, zinc and heavy elements including europium and uranium."

New type of massive explosion explains mystery star, https://phys.org/news/2021-07-massive-explosion-mystery-star.html

This report shows the star is some 7500 light years away from Earth today. My observation. An interesting method of reconciling this star with metal abundance and BB cosmology and BBN primordial gas clouds said to be created in the early universe. 13 billion years ago in the BB model, the universe size was much smaller than the present universe size said to be some 93 billion light-years in diameter where CMBR z ~ 1100 today. Using 1 billion years after BB event for the postulated hypernova, z ~ 5.5 and cosmology calculator 1, the universe could be 8 billion light years diameter when this hypernova took place to create the additional metals in SMSS J200322.54-114203.3 star. So 3D space expanded greatly since this postulated hypernova event that added more metals to the metal poor star that is now 7500 light years away from the Sun. You can calculate all these types of space expansion size changes and diameter of the universe using the cosmology calculators. The CMBR would be different too than what is currently observed.

Some parts of this model interpretation are observable, other parts are not, e.g. the size difference in the universe when the postulated hypernova took place compared to the present size or changes in CMBR when the postulated event took place compared to CMBR observations today. Another part of the model that cannot be observed is the postulated 25 solar mass star that created these additional metals observed in SMSS J2003-1142. The article states, "In our research published in Nature, we show the heavy elements detected in SMSS J2003-1142 were likely produced, not by a neutron star merger, but through the collapse and explosion of a rapidly spinning star with a strong magnetic field and a mass about 25 times that of the sun."

I feel issues like this should be clearly presented to the public when reporting on stellar evolution models used to reconcile observations with BB cosmology.