Speaker
Description
Several species of short-lived radioactive nuclei (SLRs) are known to have been present in the early solar system (ESS). They are a valuable source of our knowledge of our solar system's formation and early history. Here, we present the latest results from the ERC RADIOSTAR project in a representation usually used in cosmochemistry, where the abundances of SLRs in the early solar system, normalised to a stable or long-living isotope, are divided by their respective production ratios and plotted as a function of their mean-life. These data points are compared to the results obtained by combining the result of the steady-state formula with (i) the free decay scenario, where isotopes are left to decay for 10-30 Myr before the formation of the solar system and (ii) 3-phase interstellar medium mixing scenario. We apply this representation to s- and r-process nuclei as well as p-process nuclei. Even though the presence of two p-process nuclei (92Nb and 146Sm) is well-defined in the ESS, their usage as cosmochronometers is limited due to their poorly understood production ratio and astronomical origin.
| Length of presentation requested | Oral presentation: 8 min + 2 min questions (Poster-type talk) |
|---|---|
| Please select a keyword related to your abstract | Stellar Models and Galactic Chemical Evolution |
