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blazars

This tag is associated with 3 posts

The Cosmic γ-Ray Horizon

In today’s astrobite, we discuss the opacity of the Universe to high energy photons. The cosmic gamma-ray horizon, constrained by the authors of this paper, is a measure of this opacity, a cosmological probe and means of estimating blazar redshifts.

What Makes GRBs and Blazars Shine?

We think that blazars and gamma-ray bursts are both powered by extremely relativistic jets — but how is the kinetic energy of these jets transformed into the staggering amounts of radiation we observe?

Tidal Disruption Event

Interpreting a Galactic Burp

What happens when a normally-dormant black hole at the center of a galaxy tears apart a passing star and burps it back out again in the form of a jet? The authors of this paper think that the Swift satellite has recently witnessed exactly this!

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