Cross-correlation of weak lensing and gamma rays: implications for the nature of dark matter
| Autor: | Nicolao Fornengo, Henk Hoekstra, Stefano Camera, Marco Regis, Thomas Erben, Catherine Heymans, Hendrik Hildebrandt, Mattia Fornasa, Massimo Viola, Tilman Tröster, Konrad Kuijken, Joachim Harnois-Déraps, Ludovic Van Waerbeke, Maciej Bilicki, Shin'ichiro Ando |
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| Přispěvatelé: | GRAPPA (ITFA, IoP, FNWI), Faculty of Science, IoP (FNWI), Gravitation and Astroparticle Physics Amsterdam |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
gamma-rays: diffuse background
Particle physics Cosmology and Nongalactic Astrophysics (astro-ph.CO) Astrophysics::High Energy Astrophysical Phenomena Strong gravitational lensing Dark matter Gravitational lensing formalism FOS: Physical sciences Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences dark matter gravitational lensing: weak High Energy Physics - Phenomenology (hep-ph) diffuse background [gamma-rays] weak [gravitational lensing] 0103 physical sciences 010303 astronomy & astrophysics QC Weak gravitational lensing QB Physics Annihilation 010308 nuclear & particles physics Gamma ray Astronomy and Astrophysics Covariance High Energy Physics - Phenomenology Space and Planetary Science Astrophysics - Cosmology and Nongalactic Astrophysics Fermi Gamma-ray Space Telescope |
| Zdroj: | Monthly Notices of the Royal Astronomical Society, 467(3), 2706-2722. Oxford University Press Monthly Notices of the Royal Astronomical Society MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (ISSN 0035-8711), 467, 2706-2722 MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (ISSN 0035-8711) NASA Astrophysics Data System Tröster, T, Camera, S, Fornasa, M, Regis, M, van Waerbeke, L, Harnois-Déraps, J, Ando, S, Bilicki, M, Erben, T, Fornengo, N, Heymans, C, Hildebrandt, H, Hoekstra, H, Kuijken, K & Viola, M 2017, ' Cross-correlation of weak lensing and gamma rays: implications for the nature of dark matter ', Monthly Notices of the Royal Astronomical Society, vol. 467, no. 3, pp. 2706-2722 . https://doi.org/10.1093/mnras/stx365 |
| ISSN: | 0035-8711 |
| Popis: | We measure the cross-correlation between Fermi-LAT gamma-ray photons and over 1000 deg$^2$ of weak lensing data from the Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS), the Red Cluster Sequence Lensing Survey (RCSLenS), and the Kilo Degree Survey (KiDS). We present the first measurement of tomographic weak lensing cross-correlations and the first application of spectral binning to cross-correlations between gamma rays and weak lensing. The measurements are performed using an angular power spectrum estimator while the covariance is estimated using an analytical prescription. We verify the accuracy of our covariance estimate by comparing it to two internal covariance estimators. Based on the non-detection of a cross-correlation signal, we derive constraints on weakly interacting massive particle (WIMP) dark matter. We compute exclusion limits on the dark matter annihilation cross-section $\langle\sigma_\rm{ann} v \rangle$, decay rate $\Gamma_\rm{dec}$, and particle mass $m_\rm{DM}$. We find that in the absence of a cross-correlation signal, tomography does not significantly improve the constraining power of the analysis. Assuming a strong contribution to the gamma-ray flux due to small-scale clustering of dark matter and accounting for known astrophysical sources of gamma rays, we exclude the thermal relic cross-section for particle masses of $m_\rm{DM}\lesssim 20$ GeV. Comment: 19 pages, 17 figures, accepted in MNRAS |
| Databáze: | OpenAIRE |
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