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Sandro Tacchella

Center for Astrophysics
CfA Postdoctoral Fellow


I am a CfA Fellow at the Center for Astrophysics | Harvard & Smithsonian. I have completed my Ph. D. thesis at ETH Zurich in 2017. My research focuses on the formation and evolution of galaxies across cosmic time. I’m studying the physical mechanisms that govern the formation of the first galaxies in the early universe, the buildup of the bulge and disk component in galaxies, and the cessation of star formation in massive galaxies. I’m using both observational and theoretical tools. In particular, I use the Hubble Space Telescope, the Very Large Telescope and the MMT Observatory to take images and spectra of galaxies at the peak of cosmic star formation activity, when the universe was only 3 billion years old. On the theory side, I use cosmological simulations (VELA and IllustrisTNG) and empirical models to interpret observations and make predictions for upcoming instruments. I’m excited to be part of the James Webb Space Telescope NIRCam GTO team: we will gather unique and unprecedented images of the first galaxies in 2021.

Ph.D. in Physics from ETH Zurich, Switzerland