Prospects for Very High Energy Blazar Survey by the Next Generation Cherenkov Telescopes - Astrophysics > High Energy Astrophysical PhenomenaReportar como inadecuado




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Abstract: The prospects for future blazar surveys by next-generation very high energyVHE gamma-ray telescopes, such as Advanced Gamma-ray Imaging System AGISand Cherenkov Telescope Array CTA, are investigated using the latest model ofblazar luminosity function and its evolution which is in good agreement withthe flux and redshift distribution of observed blazars as well as theextragalactic gamma-ray background. We extend and improve the template ofspectral energy distributions SEDs based on the blazar SED sequence paradigm,to make it reliable also in the VHE bands above 100 GeV by comparing with theexisting VHE blazar data. Assuming the planned CTA sensitivities, a blindsurvey using a total survey time of ~100 hrs could detect ~3 VHE blazars, withlarger expected numbers for wider-shallower surveys. We also discussfollowing-up of Fermi blazars. Detectability of VHE blazars in the plane ofFermi flux and redshift is presented, which would be useful for future surveyplanning. Prospects and strategies are discussed to constrain the extragalacticbackground light EBL by using the absorption feature of brightest blazarspectra, as well as cut-offs in the redshift distribution. We will be able toget useful constraints on EBL by VHE blazars at different redshifts ranging0.3-1 TeV corresponding to z=0.10-0.36.



Autor: Yoshiyuki Inoue, Tomonori Totani Kyoto, Masaki Mori Ritsumeikan

Fuente: https://arxiv.org/







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