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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…
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…
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….
TESS Science Conference I (online registration deadline: July 19, 2019 at 11:59PM EDT)
The TESS Science Conference I will be the first conference dedicated to TESS mission science, including exoplanets, asteroseismology, stellar binaries, variable stars, Solar System science (e.g., asteroids and comets), extragalactic…