189 citations · 770 across the 17 of their papers we have counts for
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Presolar Silicon Carbide Grains of Types Y and Z: Their Strontium and Barium Isotopic Compositions and Stellar Origins
Nan Liu, Thomas Stephan, Sergio Cristallo +5
We report the Sr and Ba isotopic compositions of 18 presolar SiC grains of types Y (11) and Z (7), rare types commonly argued to have formed in lower-than-solar metallicity asympto…
Presolar Silicon Carbide Grains of Types Y and Z: Their Molybdenum Isotopic Compositions and Stellar Origins
Nan Liu, Thomas Stephan, Sergio Cristallo +8
We report Mo isotopic compositions of 37 presolar SiC grains of types Y (19) and Z (18), rare types commonly argued to have formed in lower-than-solar metallicity asymptotic giant…
Late formation of silicon carbide in type II supernovae
Nan Liu, Larry R. Nittler, Conel O'M. D. Alexander +1
We have found that individual presolar silicon carbide (SiC) dust grains from supernovae show a positive correlation between 49Ti and 28Si excesses, which is attributed to the radi…
J-type carbon stars: A dominant source of 14N-rich presolar SiC grains of type AB
Nan Liu, Thomas Stephan, Patrick Boehnke +6
We report Mo isotopic data of 27 new presolar SiC grains, including 12 14N-rich AB (14N/15N>440, AB2) and 15 mainstream (MS) grains, and their correlated Sr and Ba isotope ratios w…
Stellar origin of 15N-rich presolar SiC grains of type AB: supernovae with explosive hydrogen burning
Nan Liu, Larry R. Nittler, Marco Pignatari +2
We report C, N, and Si isotopic data for 59 highly 13C-enriched presolar submicron- to micron-sized SiC grains from the Murchison meteorite, including eight putative nova grains (P…
Stellar Origins of Extremely - and -enriched Presolar SiC Grains: Novae or Supernovae?
Nan Liu, Larry R. Nittler, Conel M. O'D. Alexander +4
Extreme excesses of (/<10) and (/<20) in rare presolar SiC grains have been considered diagnostic of an origin in classical novae,…