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Dual Sources of S2 Observed in Comet 67P: Insights from Comparing ROSINA Measurements and Laboratory Simulations
Choukroun, Mathieu; Hodyss, Robert; Mahjoub, Ahmed +2 more
Hydrogen sulfide (H2S) is the fifth most abundant molecule observed in the coma of comet 67P/Churyumov–Gerasimenko (67P). Prior to its incorporation into cometary materials, H2S likely underwent ultraviolet (UV) radiation exposure, which is thought to initiate a complex sulfur chemistry. We present an investigation into the U…
3 µm Phase Curves of Main-belt Asteroids from NEOWISE Photometry
Oszkiewicz, Dagmara; Masiero, Joseph; Chanover, Nancy +1 more
The shapes of asteroid phase curves are influenced by the physical properties of asteroid surfaces. The variation of an asteroid's brightness as a function of the solar phase angle can tell us about surface properties such as grain size distribution, roughness, porosity, and composition. Phase curves are traditionally derived from photometric obse…