Please use this identifier to cite or link to this item:
|SHARE CORE BASE|
|Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE|
A global autocorrelation study after the first Auger data: impact on the number density of UHECR sources.
|Authors:||Cuoco, A.; Hannestad, Steen; Haugboelle, Troels; Kachelriess, M.; Serpico, P. D.||Keywords:||Cosmic rays
Large-scale structure of universe
|Issue Date:||17-Aug-2009||Publisher:||American Astronomical Society||Citation:||Astrophysical Journal 702(2): 825-832 (2009)||Abstract:||We perform an autocorrelation study of the Auger data with the aim to constrain the number density ns of ultrahigh energy cosmic ray (UHECR) sources, estimating at the same time the effect on ns of the systematic energy scale uncertainty and of the distribution of UHECR. The use of global analysis has the advantage that no biases are introduced, either in ns or in the related error bar, by the a priori choice of a single angular scale. The case of continuous, uniformly distributed sources is nominally disfavored at 99% CL and the fit improves if the sources follow the large-scale structure of matter in the universe. The best-fit values obtained for the number density of proton sources are within a factor ~2 around ns 1 × 10–4Mpc–3 and depend mainly on the Auger energy calibration scale, with lower densities being preferred if the current scale is correct. The data show no significant small-scale clustering on scales smaller than a few degrees. This might be interpreted as a signature of magnetic smearing of comparable size, comparable with the indication of a 3° magnetic deflection coming from cross-correlation results. The effects of some approximations done on the above results are also discussed.||Description:||9 pages, 4 figures, 2 tables.-- Pre-print archive.||Publisher version (URL):||http://dx.doi.org/10.1088/0004-637X/702/2/825||URI:||http://hdl.handle.net/10261/17860||DOI:||10.1088/0004-637X/702/2/825||ISSN:||0004-637X|
|Appears in Collections:||(IFT) Artículos|
Show full item record
Review this work
checked on May 11, 2022
WEB OF SCIENCETM
checked on May 15, 2022
checked on May 16, 2022
checked on May 16, 2022
WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.