CRA Seminar: Dr. J. Brian Pitts (University of Cambridge)

Title: Change and Observables in Hamiltonian General Relativity   Abstract: Canonical (Hamiltonian) General Relativity and the associated project in quantum gravity are said to suffer from a problem of missing change, especially in "observables": part of the "problem of time." This talk addresses this problem by reflecting on definitions of observables. Typically observables in Hamiltonian … Continue reading "CRA Seminar: Dr. J. Brian Pitts (University of Cambridge)"

CRA seminar (Hari Sundar)

Bogg 1-44 VizLab

## Scalable Space-time adaptivity for Simulations of Binary Black Hole Intermediate-Mass-Ratio-Inspirals We present a highly scalable framework that targets problems of interest to the numerical relativity and broader astrophysics communities. … Continue reading "CRA seminar (Hari Sundar)"

CRA Cosmic Coffee: Brian Cook (Leiden University)

Howey N201/202 837 State Street, Atlanta, GA, United States

Title: Circumgalactic Media of Low-mass, Star-forming EAGLE Galaxies Abstract: Advances in observational techniques have made it possible to analyze the circumgalactic medium (CGM) in previously inaccessible detail. Often defined as the elusive region outside of the disk but within the virial radius of galaxies, the CGM is thought to have a critical role in processes … Continue reading "CRA Cosmic Coffee: Brian Cook (Leiden University)"

CRA Cosmic Coffee: Billy Quarles

Howey N201/202 837 State Street, Atlanta, GA, United States

Title: Obliquity Evolution of Earthlike planets in α Centauri AB Abstract: Changes in planetary obliquity, or axial tilt, influence the climatic conditions on a potentially habitable planet, where orbital perturbations from a binary star companion can drive these changes to extremes. We study the evolution of planetary obliquity for an Earthlike planet in the habitable … Continue reading "CRA Cosmic Coffee: Billy Quarles"

CRA seminar by Dr. Lionel London (MIT)

Web: "https://space.mit.edu/people/london-lionel-t" Title: On the gravitational wave multipole moments of systems with angular momentum Abstract: Since Einstein's quadrupole formalism, multipolar analysis has played a central role in gravitational wave theory. In particular, gravitational waves from compact sources are ubiquitously represented using spin weighted spherical harmonic multipoles. But there is good reason to expect that a … Continue reading "CRA seminar by Dr. Lionel London (MIT)"