From local chemical evolution to cosmic chemical evolution
2017-05
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From local chemical evolution to cosmic chemical evolution
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2017-05
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My scientific life with Keith began about twenty five years ago with the study of the
chemical evolution of light elements :cosmological elements D, He3, He4 and Li7 and
spallative elements, LiBeB. Recently, major CMB results coming from WMAP and Planck,
and observations of the total luminosity density leading to significant progress in establishing
the star formation rate (SFR) at high redshift, led us to study in detail primordial stars say,
Pop III stars, and their different properties (mass and associated nucleosynthesis, related
ionizing power..), all that in a cosmological context.
Presently, I will present the global cosmic chemical evolution within the framework of
hierarchical formation of structures, in a merger tree context, to have a look at the early
universe: reionization of the Universe, gamma ray burst and correlation with high z SFR,
metal dispersion in DLAs... Finally, the discovery of gravitational waves coming from
binary black holes mergers opens a new astrophysical window and we can, thanks to our
nucleosynthetic approach, give some constraints on the cosmic binary compact object merger
rates and associated stochastic gravitational background
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Vangioni, Elisabeth. (2017). From local chemical evolution to cosmic chemical evolution. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/188246.
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