The properties of jet in luminous blazars under the equipartition condition |
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| Institution: | 1. Department of Astronomy, Yunnan University, Kunming 650091, China;2. Key Laboratory of Astroparticle Physics, Yunnan Province, Kunming 650091, China;3. School of Mathematical Sciences and Physics, Jinggangshan University, Jiangxi Province, Ji’an 343009, China;1. Early Universe Cosmology and Strings Group, Center for Astrophysics, Space Physics, and Engineering Research, Baylor University, One Bear Place, Waco, TX 76706, US;2. Department of Physics, Baylor University, One Bear Place, Waco, TX 76706, US;1. Department of Physics, Shumen University, 9700 Shumen, Bulgaria;2. IRIDA Observatory, 67 Cherkovna Str., Sofia, Bulgaria;3. Institute of Astronomy and NAO, Bulgarian Academy of Sciences, 72 Tsarigradsko shossee blvd., 1784 Sofia, Bulgaria;1. Astronomy Department, National Research Institute of Astronomy and Geophysics (NRIAG), Helwan, Cairo, Egypt;2. Department of Astronomy and Meteorology, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt;3. Kottamia Center of Scientific Excellency of Astronomy and Space Sciences, (KCScE), Egypt\n;1. Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;2. Physics and Space Science College, China West Normal University, Nanchong 637002, China |
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| Abstract: | In this work, we study the physical properties of the high-energy (HE) emission region by modeling the quasi-simultaneous multi-wavelength(MWL) spectral energy distributions (SEDs) of 27 Fermi-LAT detected low-synchrotron-peaked (LSP) blazars. We model the jets MWL SEDs in framework of a well accepted single-zone leptonic model including synchrotron self-Compton and external Compton (EC) processes for the jets in a state of equipartition between particle and magnetic field energy densities. In the model the GeV γ-ray spectrum is modeled by a combination of two different external Compton-scattered components: (i) EC scattering of photons coming from disk and broad line region (BLR), and (ii) EC scattering of photons originating from the dust tours (DT) and BLR. We find that the SEDs can be well reproduced by the equipartition model for the most majority of the sources, and the results are in agreement with many recent studies. Our results suggest that the SEDs modelling alone may not provide a significant constraint on the location of the HE emission region if we do not know enough about the physical properties of the external environment. |
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