Liliana Caballero

Headshot of Liliana Caballero
Assistant Professor
Department of Physics
Phone number: 
(519) 824-4120 ext. 52718
Available positions for grads/undergrads/postdoctoral fellows: 
Although not currently accepting students, talented students will be given consideration.

Education and Employment Background

Professor Liliana Caballero received her B.Sc. at the Universidad Nacional de Colombia in Bogota, and her M.Sc. and PhD at Indiana University. She went on to work as a postdoctoral researcher at North Carolina State University, the Institute for Nuclear Theory (University of Washington), the ExtreMe Matter Institute at the Technical University of Darmstadt, the National Superconducting Cyclotron Laboratory (Michigan State University), and TRIUMF. She has also been affiliated with the Perimeter Institute for Theoretical Physics. Prof. Caballero joined the University of Guelph as an Assistant Professor in 2016.

Research Themes

Prof. Caballero’s research centers around theoretical nuclear astrophysics. She explores the connection between nuclear forces and several phenomena observed in the Universe, including the synthesis of heavy elements, the neutrino emission in core-collapse supernova and neutron star mergers, and bursts in accreting neutron stars. Her research aims to expand our understanding of the interplay between neutrinos, nuclear interactions, and gravity in astrophysics. She explores astrophysical phenomena that occur under extreme temperature and density conditions—running an extraterrestrial laboratory where she tests theories of the interaction between neutrons and protons. Key research themes include:

  1. Neutrinos. Neutrinos play an important role in the evolution of supernovae, neutron star mergers, and accretion disks around black holes. Understanding the connection between neutrinos and compact objects helps to shed light on gravitational wave signals.
  2. Neutron stars. The structure of nuclear matter in a neutron star depends on the not fully understood character of the nuclear force. Observation of neutron stars and their mergers provide information the unveil the properties of nuclear interactions. Neutron-star mergers are proposed as progenitors of short gamma-ray bursts, are thought to be a site for the synthesis of heavy elements, and they emit gravitational waves that might be detectable at terrestrial facilities. Prof. Caballero seeks to understand the structure of neutron stars and merger process from the pre-merger stage to the final compact object-accreting system.
  3. Nucleosynthesis. The understanding on the synthesis of heavy elements relies on our knowledge of nuclear reactions occurring in the interior of neutron-star mergers and supernovae. Prof. Caballero is interested in the role of weak reactions, gravity, and thermodynamic properties of stellar on the synthesis of elements.


  • NSERC Discovery Grant, 2020-2025
  • NSERC Discovery Grant, 2016-2020
  • Nuclear Science Day organizer, 2016
  • TEDx GuelphU, "Eccentric Stars,” 2016
  • Doctoral Training Program Fellowship, European Center for Theoretical Studies in Nuclear Physics and Related Areas, “Physics of Compact Stars”, Trento, Italy, 2007

Media Coverage

Women in STEM


Eccentric Stars