Luis Marchen

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About

Luis Marchen is a key figure in the development of space-based coronagraphy for exoplanet direct imaging. His most cited work, “The AFTA coronagraph instrument” (2013, 13 citations), played a foundational role in advancing the concept of a high-contrast stellar coronagraph for the Astrophysics Focused Telescope Assets (AFTA) study, which later informed the WFIRST (now Roman Space Telescope) mission. Marchen helped address significant technical skepticism—particularly regarding the AFTA telescope’s obstructed pupil—by demonstrating that a coronagraph could achieve the extreme contrast needed to image exoplanets despite these optical challenges. His contributions bridge instrument design and astrophysical application, enabling the detection of reflected light from Jupiter-like worlds. While his citation count is modest, his work is highly influential within the specialized field of coronagraphic instrumentation, directly supporting NASA’s flagship exoplanet missions. Marchen’s research underscores the critical engineering and design innovations required to transform ambitious exoplanet science goals into operational space observatories.