Characterizing the local gamma-ray Universe via angular cross-correlations

Abstract

With a decade of gamma-ray data from the Fermi-LAT telescope, we can now hope to answer how well we know the local Universe at gamma-ray frequencies. On the other hand, with gamma-ray data alone it is not possible to directly access the distance of the emission and to point out the origin of unresolved sources. This obstacle can be overcome by cross-correlating the gamma-ray data with catalogs of objects with well-determined redshifts and positions. In this work, we cross-correlate Fermi-LAT skymaps with the 2MPZ catalog to study the local $z<0.2$ gamma-ray Universe, where about ten percent of the total unresolved gamma-ray background is produced. We find the signal to be dominated by AGN emissions, while star forming galaxies provide a subdominant contribution. Possible hints for a particle DM signal are discussed.

arXiv comment22 pages, 16 figures

References in corpus (61)

• Planck 2015 results. XIII. Cosmological parameters
• Halo Models of Large Scale Structure
• A Comprehensive Analysis of Uncertainties Affecting the Stellar Mass - Halo Mass Relation for 0<z<4
• The Halo Occupation Distribution: Towards an Empirical Determination of the Relation Between Galaxies and Mass
• Theoretical Models of the Halo Occupation Distribution: Separating Central and Satellite Galaxies
• The spectrum of isotropic diffuse gamma-ray emission between 100 MeV and 820 GeV
• The 2MASS Redshift Survey - Description and Data Release
• GeV Observations of Star-forming Galaxies with \textit{Fermi} LAT
• 3FHL: The Third Catalog of Hard Fermi-LAT Sources
• CosmoSIS: modular cosmological parameter estimation
• The Cosmic Evolution of Fermi BL Lacertae Objects
• The Luminosity Function of Fermi-detected Flat-Spectrum Radio Quasars
• 2MASS Photometric Redshift catalog: a comprehensive three-dimensional census of the whole sky
• Myths and Truths Concerning Estimation of Power Spectra
• The Origin of the Extragalactic Gamma-Ray Background and Implications for Dark-Matter Annihilation
• Resolving the Extragalactic $\gamma$-ray Background above 50 GeV with Fermi-LAT
• Characterization of subhalo structural properties and implications for dark matter annihilation signals
• Anisotropy of the cosmic gamma-ray background from dark matter annihilation
• The radio/gamma-ray connection in Active Galactic Nuclei in the era of the Fermi Large Area Telescope
• The nature of the Diffuse Gamma-Ray Background
• The WISE Blazar-Like Radio-Loud Sources: An All-Sky Catalog Of Candidate Gamma-Ray Blazars
• Diffuse $\gamma$-ray emission from misaligned active galactic nuclei
• Anisotropies in the diffuse gamma-ray background measured by the Fermi LAT
• The MIXR sample: AGN activity versus star formation across the cross-correlation of WISE, 3XMM, and FIRST/NVSS
• On the Interstellar Medium and Star Formation Demographics of Galaxies in the Local Universe
• Statistics of gamma-ray point sources below the Fermi detection limit
• Reliable Identifications of AGN from the WISE, 2MASS and Rosat all-sky surveys
• Joint anisotropy and source count constraints on the contribution of blazars to the diffuse gamma-ray background
• Homogeneity and isotropy in the 2MASS Photometric Redshift catalogue
• Diffuse $\gamma$-ray emission from unresolved BL Lac objects
• Constraints on the annihilation cross section of dark matter particles from anisotropies in the diffuse gamma-ray background measured with Fermi-LAT
• A novel approach in the WIMP quest: Cross-Correlation of Gamma-Ray Anisotropies and Cosmic Shear
• Cross-Correlation of Cosmic Shear and Extragalactic Gamma-ray Background: Constraints on the Dark Matter Annihilation Cross-Section
• Tomography of the Fermi-LAT gamma-ray diffuse extragalactic signal via cross-correlations with galaxy catalogs
• Dark matter searches in the gamma-ray extragalactic background via cross-correlations with galaxy catalogues
• The angular power spectrum of the diffuse gamma-ray emission as measured by the Fermi Large Area Telescope and constraints on its Dark Matter interpretation
• Particle dark matter searches in the anisotropic sky
• Characterization of Dark-Matter-induced anisotropies in the diffuse gamma-ray background
• Deciphering Contributions to the Extragalactic Gamma-Ray Background from 2 GeV to 2 TeV
• Mapping dark matter in the gamma-ray sky with galaxy catalogs
• Particle dark matter searches outside the Local Group
• Unveiling the Gamma-ray Source Count Distribution Below the Fermi Detection Limit with Photon Statistics
• A cross-correlation study of the Fermi-LAT $\gamma$-ray diffuse extragalactic signal
• Tomographic-spectral approach for dark matter detection in the cross-correlation between cosmic shear and diffuse gamma-ray emission
• Models of the Contribution of Blazars to the Anisotropy of the Extragalactic Diffuse Gamma-ray Background
• Evidence of cross-correlation between the CMB lensing and the gamma-ray sky
• Cross-correlating the gamma-ray sky with catalogs of galaxy clusters
• Statistical Measurement of the Gamma-ray Source-count Distribution as a Function of Energy
• The Infrared-Gamma-Ray Connection: A WISE View of the Extragalactic Gamma-Ray Sky
• Radio Galaxies Dominate the High-Energy Diffuse Gamma-Ray Background
• Power spectrum tomography of dark matter annihilation with local galaxy distribution
• Deriving the contribution of blazars to the Fermi-LAT Extragalactic $\gamma$-ray background at $E>10$ GeV with efficiency corrections and photon statistics
• Identifying Dark Matter Annihilation Products In The Diffuse Gamma Ray Background
• Cross-correlation of weak lensing and gamma rays: implications for the nature of dark matter
• Fermi-LAT gamma-ray anisotropy and intensity explained by unresolved Radio-Loud Active Galactic Nuclei
• Cross-Correlation of the Extragalactic Gamma-ray Background with Luminous Red Galaxies
• Cosmological constraints on dark matter annihilation and decay: Cross-correlation analysis of the extragalactic $\gamma$-ray background and cosmic shear
• Tomographic imaging of the Fermi-LAT gamma-ray sky through cross-correlations: A wider and deeper look
• Planck Lensing and Cosmic Infrared Background Cross-Correlation with Fermi-LAT: Tracing Dark Matter Signals in the Gamma-Ray Background
• The correlation of extragalactic $\gamma$-rays with cosmic matter density distributions from weak-gravitational lensing
• Astrophysical interpretation of the anisotropies in the unresolved gamma-ray background

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