Lorenzo Sironi


I am an Assistant Professor in the Department of Astronomy at Columbia University.

I obtained my Ph.D. in 2011 in the Department of Astrophysical Sciences at Princeton University. Then, I moved to the Institute for Theory and Computation (ITC) at the Harvard-Smithsonian Center for Astrophysics, where I was first a NASA Einstein Post-Doctoral Fellow and then an ITC Post-Doctoral Fellow.

My field of research is theoretical high-energy astrophysics. I investigate the origin of non-thermal emission from Pulsar Wind Nebulae (PWNe), AGN jets, gamma-ray bursts (GRBs), supernovae, galaxy clusters, and low-luminosity accretion flows like Sgr A* at the center of our Galaxy.

It is still a mystery how these objects can accelerate particles up to the highly non-thermal energies required to explain the observed spectra, that typically extend from the radio up to the gamma-ray band.

By means of ab initio large-scale plasma simulations, I investigate particle acceleration in shocks and magnetic reconnection from first principles, with the aim of using the simulations to interpret the observations, and ultimately unveil the nature of astrophysical non-thermal sources.

Here you can find my CV and list of publications.

For an updated list of publications, see this link to ADS.


Department of Astronomy

Pupin Hall 1012

Columbia University

550 West 120th street

New York, NY 10027


Email: lsironi@astro.columbia.edu