• I am an astrophysicist and postdoc at University College London (UK), working on the formation and evolution of galaxies across cosmic time. My current research is focussed on the discovery and characterisation of the very first galaxies that appeared in the Universe - some 13.5 billion years ago - with large space-based telescopes such as the Hubble and Spitzer Space Telescopes and ground-based observatories such as the ESO Very Large Telescope in Chile and the Keck observatory in Hawai'i.

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A brief history of me...

My name is Guido Roberts-Borsani, I'm a postdoc at University College London working on galaxy formation and evolution with Dr. Am‌élie Saintonge and Prof. Richard Ellis. From September 2019, I will be moving to the University of California, Los Angeles (UCLA), to begin a post-doctoral position with Prof. Tommaso Treu.

I completed an MPhys degree (First Class) in Astronomy, Space Science & Astrophysics at the University of Kent in 2014, while also spending a year at the University of California, San Diego. Following the completion of my MPhys, I worked at the European Space Agency (ESTEC) in the Netherlands as a research intern and subsequently remained in the country to work at Leiden University. I began my PhD at UCL in the early months of 2015 and successfully defended my thesis in 2019.

For more information, download my full CV or see a list of my publications on NASA ADS. Alternatively, scroll down to read about my past and current research.


Summary of my research.

Astronomers try to map out the mass build-up of galaxies over cosmic time. To do this, we must understand the key periods and phenomena that shape galaxies, their surroundings, and the Universe as we whole. My research interests fall under two broad categories: gas inflows and outflows that regulate the gas content, star formation, and metallicities in and around galaxies, and a period of the early Universe called the "Epoch of Reionization", when the first stars and galaxies formed.

To observe these galaxies and phenomena, astronomers require powerful telescopes to build up large samples with which to understand their properties. My research makes use of optical, near-infrared, sub-millimetre and radio data coming from several space- and ground-based telescopes (e.g., Hubble Space Telescope/WFC3, Spitzer Space Telescope/IRAC, Keck/MOSFIRE, VLT/X-Shooter, IRAM 30m, Arecibo). The majority of my work makes use of large dedicated surveys such as the SDSS DR7, SDSS-IV/MaNGA, xCOLD GASS, and ALFALFA.

For a more in-depth look at my research, click on any of the thumbnails below.


Feel free to contact me with the details below.

Department of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, UK