Collisionless shocks in space plasma are frequently observed in
settings where the plasma is compressed against a magnetosphere
(e.g., Earth’s bow shock) or in the neighborhood of energetic
events such as supernovae or gamma ray bursts. This raises...
Machine learning methods are having a huge impact in
astrophysics. However, ML has a strong ontology — in which only the
data exist — and a strong epistemology — in which a model is
considered good if and only if it performs well on held-out...
The mid-2020s herald an exciting new chapter for cosmology,
especially in the study of weak gravitational lensing. Stage-IV
surveys—spearheaded by the Vera Rubin Observatory’s Legacy Survey
of Space and Time (LSST), the Roman Space Telescope, and...
Fast radio bursts (FRBs) are a recently discovered, poorly
understood class of transient event, and understanding their origin
has become a central problem in astrophysics. I will present FRB
science results from CHIME, a new interferometric...
