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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We report the detection of GeV gamma-ray emission from the molecular cloudcomplex that surrounds the supernova remnant (SNR) W44 using the Large AreaTelescope (LAT) onboard Fermi. While the previously reported gamma-ray emissionfrom SNR W44 is likely to arise from the dense radio-emitting filaments withinthe remnant, the gamma-ray emission that appears to come from the surroundingmolecular cloud complex can be ascribed to the cosmic rays (CRs) that haveescaped from W44. The non-detection of synchrotron radio emission associatedwith the molecular cloud complex suggests the decay of neutral pi mesonsproduced in hadronic collisions as the gamma-ray emission mechanism. The totalkinetic energy channeled into the escaping CRs is estimated to be(0.3--3)x10^{50} erg, in broad agreement with the conjecture that SNRs are themain sources of Galactic CRs.

Fermi-LAT Discovery of GeV Gamma-ray Emission from the Vicinity of SNR W44