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DTSTART:20180325T010000
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DTSTART;TZID=Europe/Rome:20191114T114500
DTEND;TZID=Europe/Rome:20191114T124500
DTSTAMP:20260409T021112
CREATED:20191023T064535Z
LAST-MODIFIED:20191031T064029Z
UID:7011-1573731900-1573735500@www.oa-roma.inaf.it
SUMMARY:Lithium in the local Volume
DESCRIPTION:We present our recent study on the chemical evolution of lithium in the thin disc of the Milky Way.\nWe found that the best agreement with the observed Li abundances in the thin disc is obtained\nconsidering novae as the main source of lithium. We assumed a delay time of ≈1 Gyr  for nova\nproduction and an effective 7Li yield of 1.8(± 0.6)×10−5 Msun over the whole nova lifetime.\nThe possibility to check our detailed assumptions on lithium production on other stellar systems\, such\nas the satellites of our Milky Way\, is seriously hampered by their distance from us. In these  systems\ndwarf stars (where the original lithium can be measured) are too faint to detect lithium lines.\nHowever\, thanks to the Gaia mission\, it was recently possible to disentangle the stars of a disrupted\ndwarf galaxy in the Galactic halo (called Enceladus or Galactic sausage). Adopting a chemical evolution\nmodel able to match the chemical enrichment in alpha elements and the metallicity distribution function\nof Enceladus\, we present our prediction for the lithium abundance of the stars of this disrupted galaxy.
URL:https://www.oa-roma.inaf.it/event/colloquium-gabriele-cescutti/
LOCATION:Aula Gratton
CATEGORIES:Seminari
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