A SEARCH FOR POINT SOURCES OF EeV NEUTRONS

作者：Abreu P^*; Aglietta M; Ahlers M; Ahn E J; Albuquerque I F M; Allard D; Allekotte I; Allen J; Allison P; Almela A; Alvarez Castillo J; Alvarez Muniz J; Batista R Alves; Ambrosio M; Aminaei A; Anchordoqui L; Andringa S; Antici'c T; Aramo C; Arganda E; Arqueros F; Asorey H; Assis P; Aublin J; Ave M; Avenier M; Avila G; Badescu A M; Balzer M; Barber K B; Barbosa A F; Bardenet R; Barroso S L C; Baughman B; Baeuml J; Baus C

来源：Astrophysical Journal, 2012, 760(2): 148.

DOI：10.1088/0004-637X/760/2/148

• cosmic rays
• Galaxy: disk
• methods: data analysis

A thorough search of the sky exposed at the Pierre Auger Cosmic Ray Observatory reveals no statistically significant excess of events in any small solid angle that would be indicative of a flux of neutral particles from a discrete source. The search covers from -90 degrees to +15 degrees in declination using four different energy ranges above 1 EeV (10(18) eV). The method used in this search is more sensitive to neutrons than to photons. The upper limit on a neutron flux is derived for a dense grid of directions for each of the four energy ranges. These results constrain scenarios for the production of ultrahigh energy cosmic rays in the Galaxy.

• 出版日期2012-12-1
• 单位东北大学