Vol 7, No 2 (2007): (155-329) / Xie

Relation between the ``Double-Hump" Behavior in the Radio Band and the Broad-Line Luminosity for Blazars

Zhao-Hua Xie, Hong Dai, Jian-Ming Hao, Lei-Ming Du, Xiong Zhang


The physics behind the spectral energy distribution (SED) of blazars remains open. We assembled 36 blazars to tackle the factors that control their SED. Now, many blazar spectra have the ``double hump" feature in the radio and far-IR frequencies. For these a parameter, bigtriangleup, is created to characterize the behavior of the SED. We found a significant correlation between the broad-line luminosity (LBLR) and bigtriangleup. Because LBLR is an indicator of the accreting power of the source in blazars, we derived a linear correlation, bigtriangleupdot M1/3.18, which suggests that the SED of blazars may depend on the accretion rate, like that of BL Lac objects. We also found a significant correlation between dot m and bigtriangleup for a sample of 11 blazars (out of one of 36) with available black hole masses. This implies the Eddington accretion ratio may influence the shape of the SED of blazars.

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DOI: https://doi.org/10.1088/1009-9271/7/2/04


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