I am an Associate Professor at the Cosmic Dawn Center in the Niels Bohr Institute at the University of Copenhagen.

I received my PhD degree from Yale University in 2010, and prior to coming to DAWN I was a postdoctoral Fellow at the European Southern Observatory (Chile) and an ESA/AURA Astronomer at the Space Telescope Science Institute in Baltimore, Maryland (USA).

I study the formation and evolution of galaxies across much of cosmic time, from relatively nearby massive, evolved objects to infant galaxies at the current limit of the observable Universe. I discover and characterize these objects by and exploiting large imaging and spectroscopic surveys with the Hubble Space Telescope, and I am helping to develop next-generation projects with the Guaranteed Time Observer and Early Release Science programs on the James Webb Space Telescope, due to be launched in 2021.