ELFT HÍRADÓ

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ELTE Fizikai Intézet

                                ORTVAY KOLLOKVIUM

                    2019. október 24., csütörtök, 15:00-kor
                Az ELTE Pázmány Péter s. 1/A alatti épületében
                           földszinti 0.81 előadóban


                                    Maria Lugaro
                    (Konkoly Thege Miklós Csillagászati Intézet)

                Radioactive nuclei from cosmochronology to habitability

Kivonatos ismertetés:
The analysis of meteorites shows that radioactive nuclei with half-lives or 
the order of millions of years were present at the birth of the Sun. The heat 
generated by the decay of one of such nuclei, aluminium-26, in the first few 
million years of the life of Solar System affected the thermo-mechanical and 
chemical evolution of planetesimals and the delivery of water to the Earth. By 
comparing meteoritic data to predictions for the production and evolution of 
radioactive nuclei in the Milky Way we are building a time line for the events 
that predated the birth of the Sun. The final aims are to identify the type of 
the stellar nursery where the Sun was born, understand the still mysterious 
origin of aluminium-26, and decide if its presence in proto-planetary disks is 
normal or special.