| Urrutia Viscarra, Paula Maria Fernanda | As propriedades e o caminho evolutivo das regiões de formação estelar no meio intergaláctico | 2014 | University of Sao Paulo | GMOS-N/GMOS-S | Brazil |
| Vaduvescu, Ovidiu | Infrared properties of star forming dwarf galaxies | 2005 | York University | GMOS-N | Canada |
| Valkonen, Laura Elina | The Sunyaev-Zel'dovich effect in galaxy clusters as a tool for estimating cosmological parameters | 2007 | University of Sussex | GMOS-S | UK |
| Vazzano, María Mercedes | Estudio multiespectral de regiones de formación estelar | 2018 | Universidad Nacional de La Plata | FLAMINGOS-2 | Argentina |
| Vilardell, Francesc | Determination of the distance to the Andromeda Galaxy using variable stars | 2009 | Universitat de Barcelona | GMOS-N | Other |
| Voges, Erica S. | The ionization sources of the diffuse ionized gas in nearby disk galaxies | 2006 | New Mexico State University | GMOS-N | USA |
| Walker, Emma Suzanne | Quantatitive analysis of type Ia supernova spectra and implications for cosmology | 2009 | University of Oxford | GMOS-N | UK |
| Wayth, Randall B. | The structure of galaxies and AGN using gravitational lensing | 2004 | University of Melbourne | GMOS-N | Australia |
| Weidmann, Walter | Caracteristicas fisicas comparativas de nebulosas planetarias con estrellas centrales ricas y pobres en hidrogeno | 2009 | Universidad Nacional de Cordoba | GMOS-S | Argentina |
| Westmoquette, Mark S. | Super star clusters, their environment, and the formation of galactic winds | 2007 | University of London, University College London | GMOS-N | UK |
| Wheelwright, Hugh Eric | High resolution studies of early type emission line stars | 2010 | University of Leeds | PHOENIX | UK |
| White, Marc C | Outflows from young stellar objects: the case of DG Tauri | 2014 | Australian National University | NIFS | Australia |
| Wiggins, Jason R. | Journey to the Heart of Darkness - Exploring Void Galaxies | 2021 | University of Notre Dame | GMOS-N | USA |
| Wolff, Schuyler Grace | Characterizing the evolution of circumstellar systems with the Hubble Space Telescope and the Gemini Planet Imager | 2017 | Johns Hopkins University | GPI | USA |
| Woo, Jong-Hak | Active black holes and the evolution of their host galaxies | 2005 | Yale University | GMOS-S | USA |
| Woodley, Kristin | Ages, metallicties, alpha-enhancement, and kinematics of the globular cluster system of NGC 5128 | 2009 | McMaster University | GMOS-S | Canada |
| Yan, Ting | A search for redshifted absorption lines at radio frenquencies | 2013 | University of Colorado at Boulder | GMOS-N | USA |
| Ye, Quanzhi | Aging comets and their meteor showers | 2016 | University of Western Ontario | GMOS-N/FLAMINGOS-2 | Canada |
| Yoachim, Peter | Thick disks in external galaxies | 2007 | University of Washington | GMOS-N/GMOS-S | USA |
| Zovaro, Henry | Resolving jet-drive feedback on sub-kpc scales | 2020 | Australian National University | NIFS+LGS | Australia |
