| Damjanov, Ivana | Structural Evolution of Quiescent Galaxies from the Peak of the Cosmic Star Formation Epoch | 2011 | University of Toronto | GMOS-N | Canada |
| Danielson, Alice | The Evolution of Massive Star-forming Galaxies: Energetics and the Interstellar Medium | 2014 | Durham University | GNIRS | UK |
| Davis, Saul | Progress in globular cluster research: insights from NGC 6397 and Messier 4 | 2008 | University of British Columbia | GMOS-S | Canada |
| de Kleer, Katherine Rebecca | Extreme Worlds of the Outer Solar System: Dynamic Processes on Uranus & Io | 2017 | University of California, Berkeley | NIRI+ALTAIR | USA |
| de Mello, Ana Beatriz | C J Ricas em Silicato Binaridade, Discos de Poeira e seu Lugar no Universo das Estrelas Carbonadas | 2013 | Observatorio Nacional | | Brazil |
| de Moraes Jr., Manoel Vieira | Tratamento das condensações em modelos de fotoionização de envoltório de novas aplicação em HR Delphini e V842 Centauri | 2010 | University of Sao Paulo | GMOS-N | Brazil |
| Debes, John H., IV | Digging for substellar objects in the stellar graveyard | 2005 | The Pennsylvania State University | NIRI+ALTAIR | USA |
| Diamond, Tiara R. | Imprints of explosion conditions on late-time spectra of type Ia supernovae | 2015 | Florida State University | GNIRS | USA |
| Diniz, Marlon Rodrigo | Estudo de populações estelares em galáxias ativas a partir de cubos de dados no infravermelho próximo | 2017 | Universidade Federal de Santa Maria (UFSM) | NIFS+ALTAIR | Brazil |
| Do Duy, Tho | Study of the silicate mineralogy of embedded young stellar objects and the interstellar medium | 2018 | University of New South Wales | MICHELLE/TRECS | Australia |
| Doering, Ryan Lee | Parameterizing the dust around Herbig Ae/Be stars: Multiwavelength imaging, radiative transfer modeling, and near-infrared instrumentation | 2008 | University of Illinois at Urbana-Champaign | TRECS | USA |
| dos Santos, Izabel Cristina Freitas | A emissão do gás da região de linhas estreitas em galáxias Seyfert próximas | 2017 | Universidade Federal de Santa Maria (UFSM) | GMOS-N | Brazil |
| Draper, Zachary Harrison | Understanding the liveliness and volatility of debris disks: from the microscopic properties to causal mechanisms | 2018 | University of Victoria | GPI | Canada |
| Drehmer, Daniel Alf | Cinemática estelar, modelos dinâmicos e determinação de massas de buracos negros supermassivos | 2015 | Universidade do Rio Grande do Sul | NIFS+ALTAIR | Brazil |
| Dupuy, Trent Jordel | Direct measurements of the fundamental properties of low-mass stars and brown dwarfs | 2010 | University of Hawaii | Hokupaa | USA |
| Durant, Martin | Magnetars: distances, variability and multi-wavelength observations | 2006 | University of Toronto | NIRI | Canada |
| Dutra, Daniel Ruschel | O ambiente circum nuclear em galáxias ativas formação estelar, toro de poeira e cinemática do gás | 2015 | Federal University of Rio Grande do Sul | MICHELLE/TRECS/GMOS-S | Brazil |
| Escudero, Carlos Gabriel | Subpoblaciones de cúmulos globulares: claves sobre la formación de galaxias de tipo temprano en grupos y el campo | 2016 | Universidad Nacional de La Plata (UNLP) | GMOS-N/GMOS-S | Argentina |
| Esposito, Thomas Matthew | Exploring planetary system evolution through high-contrast imaging | 2015 | University of California Los Angeles | GPI | USA |
| Fabbri, Joanna Natalina | A mid-infrared study of dust emission from core-collapse supernovae | 2011 | University of London, University College London | OSCIR/TRECS/MICHELLE/GMOS-N | UK |
