X-ray studies of BL Lacertae objects with the Einstein Observatory: confrontation with the synchrotron self-Compton predictions
X-ray studies of BL Lacertae objects with the Einstein Observatory: confrontation with the synchrotron self-Compton predictions
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DOI：
10.1086/161547
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发表时间：
1983-12
期刊：
影响因子：
--
通讯作者：
G. Madejski;D. Schwartz
中科院分区：
文献类型：
--
作者：
G. Madejski;D. Schwartz
X-ray flux densities measured with the Einstein Observatory are presented for a set of LB Lac objects with available VLBI angular sizes. The static, single-component synchrotron self-Compton formalism is used to predict the X-ray flux densities. Ratios of 10 to the -6th to the 10 to the -8th are found for the observed to predicted flux densities and it is concluded that such a model, at least in its simplest form, does not explain the X-ray emission from these objects as a class. The hypothesis that the compact source is in relativistic motion allows a simple resolution of the discrepancy. The results agree qualitatively with a broad distribution of bulk Lorentz factors Gamma with a fairly low typical value of Gamma approximately equal to and with a quasi-isotropic distribution of the direction of ejection relative to our line of sight.
