Publications (7)
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…
Cluster analysis of presolar silicon carbide grains: evaluation of their classification and astrophysical implications
Asmaa Boujibar, Samantha Howell, Shuang Zhang +9
Cluster analysis of presolar silicon carbide grains based on literature data for 12C/13C, 14N/15N, δ30Si/28Si, and δ29Si/28Si including or not inferred initial 26Al/27Al data, re…
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…
Common Occurrence of Explosive Hydrogen Burning in Type II Supernovae
Nan Liu, Thomas Stephan, Patrick Boehnke +6
We report Mo isotopic data for 16 15N-rich presolar SiC grains of type AB (14N/15N<solar, AB1) and their correlated Sr and Ba isotope ratios when available. Eight of the 16 AB1 gra…
Enhanced formulae for determining the axial behavior of cylindrical extension springs
Manuel Paredes, Thomas Stephan, Hervé Orcière
Cylindrical extension springs have been commonly exploited in mechanical systems for years and their behavior could be considered as well identified. Nevertheless, it appears that…
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…
COSIMA-Rosetta calibration for in-situ characterization of 67P/Churyumov-Gerasimenko cometary inorganic compounds
Harald Krüger, Thomas Stephan, Cécile Engrand +15
COSIMA (COmetary Secondary Ion Mass Analyser) is a time-of-flight secondary ion mass spectrometer (TOF-SIMS) on board the Rosetta space mission. COSIMA has been designed to measure…