Julien H. Girard
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  • About
    • Social Media
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European Southern Observatory (ESO)

Alonso de Cordova 3107
Vitacura
Santiago. Chile
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(views are my own)
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Physicist & astronomer, I am currently working  as AURA/STScI Scientist at the Space Telescope Science Institute in Baltimore. ​I am part of the JWST/NIRCam team, Lead of the Coronagraphs Working Group and the STScI Liaison to the ROMAN/CGI Science Investigation Teams.

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My collaborative research focuses on constraining our understanding of the demographics, formation and migration mechanisms of giant extra-solar planets and brown dwarfs in young and dusty circumstellar environments (e.g. proto-planetary disks). For that, my colleagues and I use high angular/contrast imaging/spectroscopy/polarimetry techniques.

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Research interests:
  • Star & Planet Formation (Exoplanets, Brown Dwarfs, Disks)
  • High Contrast Imaging, Adaptive Optics, Coronagraphy
  • Astronomical Instrumentation and Observing Techniques/Strategies


Short Bio
After completing a Master in Instrumentation Physics from the University of Utah in 2000, I obtained a 2nd Master in Astrophysics at UGA/IPAG (Grenoble) in 2001 and my PhD in 2005 at UCBL/CRAL (Lyon), validating the concept of polychromatic laser guide star on-sky. I also spent 3 years in Mexico City as a Postdoctoral Fellow at IA-UNAM and as Assistant Professor at IPN-ESFM before joining ESO in August 2009 . During 8 years
 I was Operations Staff Astronomer at ESO, spending my time between Santiago and the Paranal Observatory  in the Atacama desert, northern Chile. ​Adaptive Optics specialist, I have been the lead Instrument Scientist of the VLT instruments SPHERE and NACO.  In 2017, I joined STScI to work on the NASA/ESA/CSA mission JWST and the mission concept ROMAN (formally WFIRST). Enjoying public outreach, I am one of the ESO Photo Ambassadors.

Outside of Work​
​​I am an avid amateur of "world" music, traditional music forms from everywhere. I play (badly) the violin since age 6. I enjoy taking photographs, practicing and watching sports, skiing, tennis, skating, martial arts, ball games, hiking and cooking (eating). More than anything, I love to travel and embrace different cultures.
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  • About
    • Social Media
    • 2010 Messenger
  • CV
  • Publications
  • Contact/Travel
  • Photography
    • oldies
    • black & white
    • astronomers
  • News