Leo C. SteinNASA Einstein fellow
Cornell Dept. of Astronomy
email: leostein at astro dot cornell dot edu
615 Space Sciences Building
Ithaca, NY 14853 USA
Briefly, my research interests are different aspects of studying gravity from an astrophysical standpoint.
I have investigated how “almost-general-relativity” theories can affect gravitational observables. An important observation which would be able to distinguish between GR and almost-GR is the inspiral rate in a compact binary system, detected either through radio pulsar timing or directly with gravitational waves.
I have also begun work on a new numerical integrator for computing gravitational waves from extreme mass-ratio inspirals (in plain general relativity). The code operates in the time domain, but makes use of a spectral decomposition of the wave equation. Extreme mass-ratio inspirals are important gravitational wave sources for future space-based GW detectors.
I have also dabbled a bit in inflation and early-universe cosmology, mainly exploring (p)reheating the universe after the end of inflation. Without resorting to full non-linear simulations, one can learn about the early stages of preheating by performing a Floquet analysis of the inflaton in parametric resonance with daughter fields.
Please see my research page for more details of my research interests. You can also see my publications page for a list of my relevant publications and work in progress. For a summary, see my curriculum vitae.