EGRET Spectral Index and the Low‐Energy Peak Position in the Spectral Energy Distribution of EGRET‐detected Blazars
| Autor: | Y. C. Lin, D. L. Bertsch, S. D. Bloom, J. A. Esposito, R. C. Hartman, S. D. Hunter, G. Kanbach, D. A. Kniffen, H. A. Mayer‐Hasselwander, P. F. Michelson, R. Mukherjee, A. Mucke, P. L. Nolan, M. Pohl, O. Reimer, E. J. Schneid, D. J. Thompson, W. F. Tompkins |
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| Rok vydání: | 1999 |
| Předmět: |
Physics
Spectral index Photon Active galactic nucleus biology Astrophysics::High Energy Astrophysical Phenomena Astrophysics (astro-ph) FOS: Physical sciences Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics biology.organism_classification Synchrotron Spectral line law.invention Space and Planetary Science law Spectral energy distribution Egret Blazar Astrophysics::Galaxy Astrophysics |
| Zdroj: | The Astrophysical Journal. 525:191-194 |
| ISSN: | 1538-4357 0004-637X |
| Popis: | In current theoretical models of the blazar subclass of active galaxies, the broadband emission consists of two components: a low-frequency synchrotron component with a peak in the IR to X-ray band, and a high-frequency inverse Compton component with a peak in the gamma-ray band. In such models, the gamma-ray spectral index should be correlated with the location of the low-energy peak, with flatter gamma-ray spectra expected for blazars with synchrotron peaks at higher photon energies and vice versa. Using the EGRET-detected blazars as a sample, we examine this correlation and possible uncertainties in its construction. Comment: 17 pages including 1 figure, accepted for publication in The Astrophysical Journal |
| Databáze: | OpenAIRE |
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