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26 April 2024 |
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Correlations between Ultrahigh Energy Cosmic Rays and Infrared-Luminous Galaxies | | Glennys R. Farrar
; Andreas A. Berlind
; Ingyin Zaw
; | | Date: |
28 Apr 2009 | | Abstract: | We confirm the UHECR horizon established by the Pierre Auger Observatory
using the heterogeneous Veron-Cetty Veron (VCV) catalog of AGNs, by performing
a redshift-angle-IR luminosity scan using PSCz galaxies having infrared
luminosity greater than 10^{10}L_sun. The strongest correlation -- for L_ir >
10^{10.5}L_sun, maximum separation 2.1 deg, and z_max = 0.016 -- arises in
fewer than 0.3% of scans with isotropic source directions. Since the PSCz
catalog is complete and volume-limited for these parameters, this shows that
the UHECR horizon discovered by Auger is not an artifact of the incompleteness
and other idosyncracies of the VCV catalog. The strength of the correlation
between UHECRs and the nearby highest-IR-luminosity PSCz galaxies is stronger
than in about 90% percent of trials with scrambled luminosity assignments for
the PSCz galaxies. If confirmed by future data, this result would indicate that
the sources of UHECRs are more strongly associated with luminous IR galaxies
than with ordinary, lower IR luminosity galaxies. | | Source: | arXiv, 0904.4276 | | Services: | Forum | Review | PDF | Favorites | |
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