English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

An issue currently under debate in the literature is how far from the blackhole is the Fermi-observed GeV emission of powerful blazars emitted. Here wepresent a clear diagnostic tool for testing whether the GeV emission site islocated within the sub-pc broad emission line (BLR) region or further out inthe few pc scale molecular torus (MT) environment. Within the BLR thescattering takes place at the onset of the Klein-Nishina regime, causing theelectron cooling time to become almost energy independent and as a result, thevariation of high-energy emission is expected to be achromatic. Contrarily, ifthe emission site is located outside the BLR, the expected GeV variability isenergy-dependent and with amplitude increasing with energy. We demonstrate thisusing time-dependent numerical simulations of blazar variability.

A diagnostic test for determining the location of the GeV emission in powerful blazars