Member Directory The AAS maintains a membership directory to facilitate member interaction and to support the conduct of official Society business. Search directory for: Filter Results By Clear Filters Type of Science Exopla (1) GRBs (1) High-Energy Pheno (1) Interstellar Me (1) Solar System/Planetary Sci (1) Star Formation & Evolu (1) Supernovae (1) (-) Galaxy Formation & Evolu (1) (-) Heliophy (1) State AL (1) CA (1) GA (1) IA (1) MA (1) MD (3) NM (2) NV (1) OR (1) PA (1) TX (1) (-) NY (2) Facet State City New York (1) Facet City Membership Class (-) Full Member (2) Facet Membership Class Division HEAD (4) SPD (2) DDA (1) DPS (1) (-) LAD (2) Facet Division Showing 1-2 of 2 results Michael Hahn Full Member Affiliation Columbia University State/Province NY Country United States Dmitry Ivanov Full Member Affiliation Columbia University State/Province NY Country United States