The Statistic Analysis of GeV Spectral Breaks in Bright Gamma-Ray FSRQs
| Autor: | Zhu, K. R., Chen, J. M., Zhang, L. |
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| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | The Astrophysical Journal Supplement Series(2024) 275:41 (22pp) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.3847/1538-4365/ad8639 |
| Popis: | We present the statistic results of GeV spectral breaks of bright gamma-ray flat-spectrum radio quasars (FSRQs) in the energy range of 0.1-10 GeV based on New Pass 8 date of the Large Area Telescope abroad on Fermi Gamma-ray Space Telescope. We have fitted the 15-year average gamma-ray spectra of 755 FSRQs by using both a broken power-law (BPL) and the Logarithmic Parabolas (LP) models, and obtained 87 bright gamma-ray FSRQs with their integrated photon fluxes greater than $2.16\times 10^{-8}$ cm$^{-2}$ s$^{-1}$. From our results, the FSRQ population shows similar preferences for both the BPL and LP models in gamma-ray spectral fitting and clustering analysis suggests that BPL-preferred and LP-preferred FSRQs belong to the same category. Our results indicate that GeV spectral breaks in bright gamma-ray FSRQs are located at $\rm 2.90\pm1.92$ GeV in the rest frame, and the observed change in photon index is $\rm \Delta \gamma =0.45 \pm 0.19$, which is consistent with the expected value for a cooling break of electrons scattering seed photons. Comment: 10 pages, 9 figures |
| Databáze: | arXiv |
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