Photochemical Processing by Nearby Stars Recorded in Sulfur Isotopes of Cosmic Symplectite
Lionel Vacher, Postdoctoral Research Associate, Department of Physics and the McDonnell Center for the Space Sciences
Planetary systems forming in the Orion star-forming region are seen to be affected by ultraviolet radiation from nearby massive O and B stars. Using sulfur isotopic composition of cosmic symplectite (an exotic phase in the primitive meteorite Acfer 094), we show that the Sun's stellar neighborhood, likely O and B stars in a massive-star-forming region, affected the composition of the Solar System's primordial building blocks.