Abstract
It has become clear in recent years that relativistic beaming is a good explanation for the BL Lac phenomenon. Of studies based on the relativistic beaming model of BL Lac objects, we note that the orientation of jet's axis to the line-of-sight is very small and, therefore, the observed flux emitted from a rapidly moving source is orders of magnitude higher than the flux in its rest-frame:F obs = δ3 + α F intr, where δ is the bulk relativistic Doppler factor. Then the observed apparent magnitudem v must be corrected for this effect. For our 39 samples, the corrected apparent magnitudem corr v and logZ have a good correlation.
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Xie, G.Z., Liu, F.K., Zhu, Y.Y. et al. Cosmological implications of BL Lac objects. Astrophys Space Sci 179, 321–329 (1991). https://doi.org/10.1007/BF00646952
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DOI: https://doi.org/10.1007/BF00646952