2012/03/31 by K. Reitberger, O. Reimer, A. Reimer +4
Mathematics · Physics and Astronomy · #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Astrophysics and Cosmic Phenomena #Coincidence #Component (thermodynamics) #Cutoff #Electron #Fermi Gamma-ray Space Telescope #Flux (metallurgy) #Function (biology) #Gamma ray #Gamma-ray bursts and supernovae #Mathematics #Nuclear physics #Physics #Power law #Quantum mechanics #Statistics #Telescope #astro-ph.HE
paper · pdf · doi:10.1051/0004-6361/201219249
published as Astronomy & Astrophysics, Volume 544, id.A98, August 2012 · 11 pages, 9 figures
openalex publication_date 2012/07/06 · arxiv created 2012/08/13 · arxiv updated 2012/08/14 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Aims. Observations of high-energy γ-rays recently revealed a persistent source in spatial coincidence with the binary system η Carinae. Since modulation of the observed γ-ray flux on orbital time scales has not been reported so far, an unambiguous identification was hitherto not possible. Particularly the observations made by the Fermi Large Area Telescope (LAT) posed additional questions regarding the actual emission scenario. Analyses show two energetically distinct components in the γ-ray spectrum, which are best described by an exponentially cutoff power-law function (CPL) at energies below 10 GeV and a power-law (PL) component dominant at higher energies.