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within Y. G. Zheng Remove this filter Astrobiology Remove this filter Astrophysics and Astroparticles Remove this filter

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  1. No Access

    Article

    The broad band spectral index of blazars in a low state

    Using the broad band spectral index of 164 blazars in a low state, we studied the possible correlation between different broad band spectral index (α r.ir ...

    Y. G. Zheng, X. Zhang, S. M. Hu in Astrophysics and Space Science (2007)

  2. No Access

    Article

    Variability and spectral variation of 3C 66A

    3C 66A was monitored by the BATC (Bei**g-Arizona-Taipei-Connecticut) telescope from 2005 to 2008, 1994 observations were obtained on 89 nights. Detailed research and analysis was performed on these observatio...

    Shao Ming Hu, Jianghua Wu, H. Y. Guo, X. Zhou, X. Zhang… in Astrophysics and Space Science (2011)

  3. No Access

    Article

    Broad line and multi-wave luminosity relations in Fermi FSRQs

    We study broad line and multi-wave luminosity relations for 80 flat-spectrum radio quasars (FSRQs) detected by Fermi LAT. Our results are as follows: for FSRQs, the correlations between logL ...

    D. R. **ong, H. J. Zhang, X. Zhang, Y. G. Zheng, T. F. Yi… in Astrophysics and Space Science (2013)

  4. No Access

    Article

    GeV-TeV \(\gamma \) -ray energy spectral break of BL Lac objects

    In this paper, we compile the very-high-energy and high-energy spectral indices of 43 BL Lac objects from the literature. Based on a simple math model, ...

    W. Zhong, W. G. Liu, Y. G. Zheng in Astrophysics and Space Science (2018)

  5. No Access

    Article

    Establishing a particle distribution for multi-wavelength emission from BL Lac objects

    Electrons are accelerated at the shock wave diffuse and advect outward, and subsequently drift away into the emitting region of the jet that is located in the downstream flow from the plane shock. The current ...

    X. X. **e, K. R. Zhu, S. J. Kang, Y. G. Zheng in Astrophysics and Space Science (2020)

  6. No Access

    Article

    Two components model for TeV \(\gamma \) -ray emission from extreme high-energy BL Lac objects

    Extreme high-energy peaked BL Lac objects (EHBLs) are an emerging class of blazars with exceptional spectral properties, e.g., enhanced emission in the hard X-ray region and a hard spectrum at very high ...

    Q. Dong, Y. G. Zheng, C. Y. Yang in Astrophysics and Space Science (2021)