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Your search keyword '"Horan, D."' showing total 3 results
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3 results on '"Horan, D."'

2. From radio to TeV: the surprising spectral energy distribution of AP Librae.

Author

Sanchez, D. A., Giebels, B., Fortin, P., Horan, D., Szostek, A., Fegan, S., Baczko, A. K., Finke, J., Kadler, M. L., Kovalev, Y. Y., Lister, M. L., Pushkarev, A. B., and Savolainen, T.

Subjects
SPECTRAL energy distribution, X-ray emission spectroscopy, X-ray astronomy, LEPTONS (Nuclear physics), NUCLEAR astrophysics
Abstract

Following the discovery of high-energy (HE; E > 10 MeV) and very-high-energy (VHE; E > 100 GeV) γ-ray emission from the low-frequency-peaked BL Lac (LBL) object AP Librae, its electromagnetic spectrum is studied over 60 octaves in energy. Contemporaneous data in radio, optical and UV together with the (non-simultaneous) γ-ray data are used to construct the most precise spectral energy distribution of this source. The data have been found to be modelled with difficulties with single-zone homogeneous leptonic synchrotron self-Compton (SSC) radiative scenarios due to the unprecedented width of the HE component when compared to the lower-energy component. The two other LBL objects also detected at VHE appear to have similar modelling difficulties. Nevertheless, VHE γ-rays produced in the extended jet could account for the VHE flux observed by HESS. [ABSTRACT FROM AUTHOR]

Published
2015
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