Joakim Edsjö is a Swedish professor of theoretical physics at Stockholm University.
His research is carried out at the interface of particle physics, astrophysics and cosmology, and is particularly concerned with the search for dark matter.
Edsjö received his PhD in 1997 from the Uppsala University, with a thesis by the title of "Aspects of neutrino detection of neutralino dark matter".
Edsjö is well known for having developed DarkSUSY, a famous numerical package for neutralino dark matter calculations, together with Paolo Gondolo, Lars Bergström, Piero Ullio, Mia Schelke and Edward Baltz.
Together with Pat Scott and Malcolm Fairbairn, he developed DarkStars, a code that implements capture, annihilation and energy transport by dark matter in a stellar evolution code.