Research Fellow, Institute of Cosmology and Gravitation, University of Portsmouth

Hello visitor, welcome to my personal website! I’m a physicist working on theories of gravity, black holes, gravitational waves and cosmology.

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Contact

<aside> <img src="/icons/mail_gray.svg" alt="/icons/mail_gray.svg" width="40px" /> [email protected]

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https://inspirehep.net/authors/2626652?ui-citation-summary=true

https://orcid.org/0000-0003-2285-7729

https://github.com/sergisl

https://x.com/sergisirera

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Resume

Find out about my academic career and other activities here, as well as a copy of my CV.

Research

The aim of my research is to test the fundamental nature of gravity across all scales, from the strong-field environments of compact objects to the evolution of the Universe. I employ black hole perturbation theory to model how ringdown signals are modified in alternative theories of gravity, and confront such theoretical predictions with gravitational wave observations. My work also extends to the cosmological regime, where I investigate scalar-tensor theories as dark energy models and study how nonlinear perturbations encode screening mechanisms. More details in the Research page!

Outreach

Sharing how cool physics is with younger generations and the general public is definitely one of my favourite things to do. Here you will find links and descriptions for several of my outreach activities.

Art Portfolio

As a bonus, here I share some of the art that I like to make, including watercolor, graphite, stone drawing, pottery and digital art.

Resources

Over the years, I have developed some resources which have helped other students and researches and which I’m happy to share in this page.