Published 2017
| Version v1
Publication
Origin of meteoritic stardust unveiled by a revised proton-capture rate of 17O
Creators
- Lugaro, M.
- Karakas, A. I.
- Bruno, C. G.
- Aliotta, M.
- Nittler, L. R.
- Bemmerer, D.
- Best, A.
- Boeltzig, A.
- Broggini, C.
- Caciolli, A.
- CAVANNA, FRANCESCA
- Ciani, G. F.
- CORVISIERO, PIETRO
- Davinson, T.
- Depalo, R.
- Di Leva, A.
- Elekes, Z.
- FERRARO, FEDERICO
- Formicola, A.
- Fülöp, Z.
- Gervino, G.
- Guglielmetti, A.
- Gustavino, C.
- Gyürky, G.
- Imbriani, G.
- Junker, M.
- Menegazzo, R.
- Mossa, V.
- Pantaleo, F. R.
- Piatti, D.
- PRATI, PAOLO
- Scott, D. A.
- Straniero, O.
- Strieder, F.
- Szücs, T.
- Takács, M. P.
- Trezzi, D.
Contributors
Others:
- Lugaro, M.
- Karakas, A. I.
- Bruno, C. G.
- Aliotta, M.
- Nittler, L. R.
- Bemmerer, D.
- Best, A.
- Boeltzig, A.
- Broggini, C.
- Caciolli, A.
- Cavanna, Francesca
- Ciani, G. F.
- Corvisiero, Pietro
- Davinson, T.
- Depalo, R.
- Di Leva, A.
- Elekes, Z.
- Ferraro, Federico
- Formicola, A.
- Fülöp, Z.
- Gervino, G.
- Guglielmetti, A.
- Gustavino, C.
- Gyürky, G.
- Imbriani, G.
- Junker, M.
- Menegazzo, R.
- Mossa, V.
- Pantaleo, F. R.
- Piatti, D.
- Prati, Paolo
- Scott, D. A.
- Straniero, O.
- Strieder, F.
- Szücs, T.
- Takács, M. P.
- Trezzi, D.
Description
Stardust grains recovered from meteorites provide highprecision
snapshots of the isotopic composition of the stellar
environment in which they formed1. Attributing their origin
to specific types of stars, however, often proves difficult.
Intermediate-mass stars of 4–8 solar masses are expected
to have contributed a large fraction of meteoritic stardust2,3.
Yet, no grains have been found with the characteristic isotopic
compositions expected for such stars4,5. This is a long-standing
puzzle, which points to serious gaps in our understanding of
the lifecycle of stars and dust in our Galaxy. Here we show that
the increased proton-capture rate of 17O reported by a recent
underground experiment6 leads to 17O/16O isotopic ratios that
match those observed in a population of stardust grainsfor
proton-burning temperatures of 60–80 MK. These temperatures
are achieved at the base of the convective envelope
during the late evolution of intermediate-mass stars of
4–8 solar masses7–9, which reveals them as the most likely site
of origin of the grains. This result provides direct evidence
that these stars contributed to the dust inventory from which
the Solar System formed.
Additional details
Identifiers
- URL
- http://hdl.handle.net/11567/858921
- URN
- urn:oai:iris.unige.it:11567/858921
Origin repository
- Origin repository
- UNIGE