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Two Talks: Mapping Galaxy Scale Magnetic Fields (speaker: Jordan Montgomery, Boston University); Fast and Furious: Young Supernovae and Their Progenitors (Yi Cao, CalTech)

…* * * Fast and Furious: Young Supernovae and Their Progenitors Abstract: Observations of supernovae within a few days of explosion provide unique constraints to the nature of their progenitors….

MIT Astrophysics Colloquium 11/21/2023 — Anna Ho: Finding Relativistic Stellar Explosions as Fast Optical Transients

20220819GH – CORNELL UNIV A&S – New faculty and one current professor Title: Finding Relativistic Stellar Explosions as Fast Optical Transients Abstract: For the last half-century, relativistic outflows accompanying the…

The First Gamma-Ray Counterpart to a Fast Radio Burst (& other adventures with subthreshold gamma-ray data) — Speaker: Jimmy DeLaunay, Penn State University

Abstract: Fast Radio Bursts (FRBs) are millisecond-long bursts of GHz-frequency emission that appear to be of cosmological origin. The high all-sky rate of FRBs, R~2100 per day, and estimated energy…

Fast Radio Bursts–What Can We Say About Emission Mechanisms and Origins? (speaker: Jonathan Katz, Washington University in St. Louis)

The pulse widths, dispersion measures and dispersion indices of Fast Radio Bursts (FRB) impose coupled constraints that all models must satisfy. Conventional single thin screen scattering models imply electron densities…

Study doubles the number of known repeating fast radio bursts

Fast radio bursts (FRBs) are repeating flashes of radio waves that remain a source of mystery to astronomers. We do know a few things about them: FRBs originate from far…

Fast-spinning black holes narrow the search for dark matter particles

…that two previously detected black holes are spinning too fast to have been affected by any ultralight bosons. Because of their large spins, the black holes’ existence rules out the…

Astrophysics Colloquium 10/29/19: Understanding Enigmatic Nature of AGN Ultra-Fast Outflows in Magnetic View (speaker: Keigo Fukumura, James Madison University)

Abstract: Blueshifted ionized absorption features at near-relativistic velocities (v~0.1c or higher), known as ultra-fast outflows (UFOs), seem to be ubiquitously present in X-ray spectra of many AGN populations of different…

Q&A: Rainer Weiss on LIGO’s origins. MIT physicist developed the concept for LIGO as a teaching exercise.

write and most of the students in the class could do it. Forget for a moment that this was a thought experiment requiring impossibly precise clocks. The principle was OK….