220 citations · 732 across the 12 of their papers we have counts for
12 papers
Isotopic ratios for C, N, Si, Al, and Ti in C-rich presolar grains from massive stars
Jordan Schofield, Marco Pignatari, Richard J Stancliffe +1
Certain types of silicon carbide (SiC) grains, e.g., SiC-X grains, and low density (LD) graphites are C-rich presolar grains that are thought to have condensed in the ejecta of cor…
Presolar stardust in asteroid Ryugu
Jens Barosch, Larry R. Nittler, Jianhua Wang +121
We have conducted a NanoSIMS-based search for presolar material in samples recently returned from C-type asteroid Ryugu as part of JAXA's Hayabusa2 mission. We report the detection…
Migration of D-type asteroids from the outer Solar System inferred from carbonate in meteorites
Wataru Fujiya, Peter Hoppe, Takayuki Ushikubo +6
Recent dynamical models of Solar System evolution and isotope studies of rock-forming elements in meteorites have suggested that volatile-rich asteroids formed in the outer Solar S…
Carbon-rich presolar grains from massive stars. Subsolar 12C/13C and 14N/15N ratios and the mystery of 15N
M. Pignatari, E. Zinner, P. Hoppe +7
Carbon-rich grains with isotopic anomalies compared to the Sun are found in primitive meteorites. They were made by stars, and carry the original stellar nucleosynthesis signature.…
Evidence for Radiogenic Sulfur-32 in Type AB Presolar Silicon Carbide Grains?
Wataru Fujiya, Peter Hoppe, Ernst Zinner +2
We report C, Si, and S isotope measurements on 34 presolar silicon carbide grains of Type AB, characterized by 12C/13C < 10. Nitrogen, Mg-Al-, and Ca-Ti-isotopic compositions were…
Silicon carbide grains of type C provide evidence for the production of the unstable isotope Si in supernovae
M. Pignatari, E. Zinner, M. G. Bertolli +8
Carbon-rich grains are observed to condense in the ejecta of recent core-collapse supernovae, within a year after the explosion. Silicon carbide grains of type X are C-rich grains…