Publication
Searches for Large-Scale Anisotropy in the Arrival Directions of Cosmic Rays Detected above Energy of $10^{19}$ eV at the Pierre Auger Observatory and the Telescope Array
| dc.contributor.author | Telescope Array, Pierre Auger collaboration (615 authors) | |
| dc.contributor.author | Abreu, Pedro | |
| dc.contributor.author | Andringa, Sofia | |
| dc.contributor.author | Assis, Pedro | |
| dc.contributor.author | Brogueira, Pedro | |
| dc.contributor.author | Cazon, Lorenzo | |
| dc.contributor.author | Conceição, Ruben | |
| dc.contributor.author | Diogo, Francisco | |
| dc.contributor.author | Espadanal, Joao | |
| dc.contributor.author | Gonçalves, Patrícia | |
| dc.contributor.author | Oliveira, Micael | |
| dc.contributor.author | Pimenta, Mário | |
| dc.contributor.author | Santo, Catarina E | |
| dc.contributor.author | Santos, Eva | |
| dc.contributor.author | Sarmento, Raul | |
| dc.contributor.author | Tomé, Bernardo | |
| dc.date.accessioned | 2019-02-04T04:51:21Z | |
| dc.date.available | 2019-02-04T04:51:21Z | |
| dc.date.issued | 2014-10-07 | |
| dc.date.updated | 2019-02-04T04:51:21Z | |
| dc.description.abstract | Spherical harmonic moments are well-suited for capturing anisotropy at any scale in the flux of cosmic rays. An unambiguous measurement of the full set of spherical harmonic coefficients requires full-sky coverage. This can be achieved by combining data from observatories located in both the northern and southern hemispheres. To this end, a joint analysis using data recorded at the Telescope Array and the Pierre Auger Observatory above $10^{19}$ eV is presented in this work. The resulting multipolar expansion of the flux of cosmic rays allows us to perform a series of anisotropy searches, and in particular to report on the angular power spectrum of cosmic rays above $10^{19}$ eV. No significant deviation from isotropic expectations is found throughout the analyses performed. Upper limits on the amplitudes of the dipole and quadrupole moments are derived as a function of the direction in the sky, varying between 7% and 13% for the dipole and between 7% and 10% for a symmetric quadrupole. | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | Astrophys.J. 794 (2014) 172; DOI 10.1088/0004-637X/794/2/172 | |
| dc.identifier.uri | http://dx.doi.org/10.1088/0004-637X/794/2/172 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/26681 | |
| dc.language.iso | eng | |
| dc.title | Searches for Large-Scale Anisotropy in the Arrival Directions of Cosmic Rays Detected above Energy of $10^{19}$ eV at the Pierre Auger Observatory and the Telescope Array | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article |