中国物理B ›› 2001, Vol. 10 ›› Issue (6): 568-574.doi: 10.1088/1009-1963/10/6/320

• • 上一篇    

GAMMA-RAY AND X-RAY EMISSION FROM GAMMA-RAY-LOUD BLAZARS

赵刚1, 张雄2, 郑广生3, 张力3, 谢光中4   

  1. (1)Beijing Astronomical Observatory, Chinese Academy of Sciences, Beijing 100080, China; (2)Beijing Astronomical Observatory, Chinese Academy of Sciences, Beijing 100080, China; Department of Physics, Yunnan Normal University, Kunming 650092, China; (3)Department of Physics, the University of Hong Kong, Hong Kong, China; (4)Yunnan Observatory, Chinese Academy of Sciences, Kunming 650091, China
  • 收稿日期:2000-07-10 修回日期:2001-01-14 出版日期:2001-06-15 发布日期:2005-06-12
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 19963001).

GAMMA-RAY AND X-RAY EMISSION FROM GAMMA-RAY-LOUD BLAZARS

Zhang Xiong (张雄)ab, Zhao Gang (赵刚)a, Xie Guang-zhong (谢光中)c, Zheng Guang-sheng (郑广生)d, Zhang Li (张力)d   

  1. a Beijing Astronomical Observatory, Chinese Academy of Sciences, Beijing 100080, China; b Department of Physics, Yunnan Normal University, Kunming 650092, China; c Yunnan Observatory, Chinese Academy of Sciences, Kunming 650091, China; d Department of Physics, the University of Hong Kong, Hong Kong, China
  • Received:2000-07-10 Revised:2001-01-14 Online:2001-06-15 Published:2005-06-12
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 19963001).

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摘要： We present a strong correlation of the gamma-ray (above 100 MeV) mean spectral indices αγ and X-ray (1 keV) mean spectral indices αX for 34 gamma-ray-loud blazars (16 BL Lac objects and 18 flat spectrum radio quasars). A strong correlation is also found between the gamma-ray flux densities Fγ and X-ray flux densities FX in the low state for 47 blazars (17 BL Lac and 30 flat spectrum radio quasars). Possible correlation on the gamma-ray emission mechanism is discussed. We suggest that the main gamma-ray radiation mechanism is probably the synchrotron process. The gamma-ray emission may be somewhat different from that of BL Lac objects and flat spectrum radio quasars.

Abstract: We present a strong correlation of the gamma-ray (above 100 MeV) mean spectral indices $\alpha_\gamma$ and X-ray (1 keV) mean spectral indices $\alpha$X for 34 gamma-ray-loud blazars (16 BL Lac objects and 18 flat spectrum radio quasars). A strong correlation is also found between the gamma-ray flux densities $F_\gamma$ and X-ray flux densities FX in the low state for 47 blazars (17 BL Lac and 30 flat spectrum radio quasars). Possible correlation on the gamma-ray emission mechanism is discussed. We suggest that the main gamma-ray radiation mechanism is probably the synchrotron process. The gamma-ray emission may be somewhat different from that of BL Lac objects and flat spectrum radio quasars.

Key words: BL Lacertae objects, general-$\gamma$-rays, general-X-rays, nonthermal

中图分类号:  (Active and peculiar galaxies and related systems (including BL Lacertae objects, blazars, Seyfert galaxies, Markarian galaxies, and active galactic nuclei))

  • 98.54.Cm
98.54.Aj (Quasars)