189 citations · 770 across the 17 of their papers we have counts for
17 papers
Interstellar Heritage and the Birth Environment of the Solar System
Edwin A. Bergin, Conel Alexander, Maria Drozdovskaya +2
In this chapter, we explore the origins of cometary material and discuss the clues cometary composition provides in the context of the origin of our solar system. The review focuse…
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 Stardust in Highly Pristine CM Chondrites Asuka 12169 and Asuka 12236
Larry R. Nittler, Conel M. O'D. Alexander, Andrea Patzer +1
We report a NanoSIMS search for presolar grains in the CM chondrites Asuka (A) 12169 and A12236. We found 90 presolar O-rich grains and 25 SiC grains in A12169, giving matrix-norma…
The effects of atmospheric entry heating on organic matter in interplanetary dust particles
My E. I. Riebe, Dionysis I. Foustoukos, Conel M. O'D. Alexander +4
Interplanetary dust particles (IDPs) were likely major sources of extraterrestrial organics to the early Earth. However, IDPs experience heating to > 500 C for up to several sec…
Presolar Grains in Primitive Ungrouped Carbonaceous Chondrite Northwest Africa 5958
Larry R. Nittler, Rhonda M. Stroud, Conel M. O'D. Alexander +1
We report a correlated NanoSIMS-transmission electron microscopy study of the ungrouped carbonaceous chondrite Northwest Africa (NWA) 5958. We identified 10 presolar SiC grains, 2…
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…