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in creator/contributor: "Hannestad, S."

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The Signature of Large Scale Structures on the Very High Energy Gamma-Ray Sky

If the diffuse extragalactic gamma ray emission traces the large scale structures of the universe, peculiar anisotropy patterns are expected in the gamma ray sky. In particular, because of the cutoff distance introduced by the absorption of 0.1-10 TeV photons on the infrared/optical background, prominent correlations with the local structures within a range of few hundreds Mpc should be present. We provide detailed predictions of the signal based on the PSCz map of the local universe. We also u… more

Date: December 1, 2006

Creator: Cuoco, A.; Hannestad, S.; Haugbolle, T.; Miele, G.; Serpico, P. D. & Tu, H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

The Velocity Field of the Local Universe From Measurements of Type Ia Supernovae

We present a measurement of the velocity flow of the local universe relative to the CMB rest frame, based on the Jha, Riess & Kirshner (2007) sample of 133 low redshift type Ia supernovae. At a depth of 4500 km s{sup -1} we find a dipole amplitude of 279 {+-} 68 km s{sup -1} in the direction l = 285{sup o} {+-} 18{sup o}, b = -10{sup o} {+-} 15{sup o}, consistent with earlier measurements and with the assumption that the local velocity field is dominated by the Great Attractor region. At a larg… more

Date: December 8, 2006

Creator: Haugbolle, T.; Hannestad, S.; Thomsen, B.; U., /Aarhus; Fynbo, J.; Inst., /Bohr et al.