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 analyze the 6.5yr all-sky data from the Fermi LAT restricted to gamma-rayphotons with energies between 0.6-307.2GeV. Raw count maps show a superpositionof diffuse and point-like emission structures and are subject to shot noise andinstrumental artifacts. Using the D3PO inference algorithm, we model theobserved photon counts as the sum of a diffuse and a point-like photon flux,convolved with the instrumental beam and subject to Poissonian shot noise. D3POperforms a Bayesian inference in this setting without the use of spatial orspectral templates;i.e., it removes the shot noise, deconvolves theinstrumental response, and yields estimates for the two flux componentsseparately. The non-parametric reconstruction uncovers the morphology of thediffuse photon flux up to several hundred GeV. We present an all-sky spectralindex map for the diffuse component. We show that the diffuse gamma-ray fluxcan be described phenomenologically by only two distinct components: a softcomponent, presumably dominated by hadronic processes, tracing the dense, coldinterstellar medium and a hard component, presumably dominated by leptonicinteractions, following the hot and dilute medium and outflows such as theFermi bubbles. A comparison of the soft component with the Galactic dustemission indicates that the dust-to-soft-gamma ratio in the interstellar mediumdecreases with latitude. The spectrally hard component exists in a thickGalactic disk and tends to flow out of the Galaxy at some locations.Furthermore, we find the angular power spectrum of the diffuse flux to roughlyfollow a power law with an index of 2.47 on large scales, independent ofenergy. Our first catalog of source candidates includes 3106 candidates ofwhich we associate 1381(1897) with known sources from the 2nd(3rd) Fermicatalog. We observe gamma-ray emission in the direction of a few galaxyclusters hosting radio halos.

The Denoised, Deconvolved, and Decomposed Fermi $\gamma$-ray sky - An application of the D$^3$PO algorithm