ar X iv : a st ro - p h / 99 10 53 8 v 1 2 9 O ct 1 99 9 Polarization and beaming effect for BL Lacertae objects - II
نویسندگان
چکیده
Received ; accepted – 2 – ABSTRACT In this paper, based on the polarization-Doppler factor result (Fan et al. 1997, paper I), relations between the polarization and the variation (∆m), as well as the core-dominance (log R) are derived and used to analyse the observation data of a 37-BL Lacertae-object sample. These correlations are consistent with the statistical results, which suggest that the polarization, the variation, and the core-dominance parameter are the indications of the beaming effect.
منابع مشابه
ar X iv : a st ro - p h / 99 10 53 8 v 2 1 9 N ov 1 99 9 Polarization and beaming effect for BL Lacertae objects - II
Received ; accepted – 2 – ABSTRACT In this paper, based on the polarization-Doppler factor result (Fan et al. 1997, paper I), relations between the polarization and the variation (∆m), as well as the core-dominance (log R) are derived and used to analyse the observation data of a 37-BL Lacertae-object sample. These correlations are consistent with the statistical results, which suggest that the...
متن کاملar X iv : a st ro - p h / 98 06 24 9 v 2 2 6 O ct 1 99 9 Analyzing the Multiwavelength Spectrum of BL Lacertae During the July 1997
The multiwavelength spectrum of BL Lacertae during its July 1997 outburst is analyzed in terms of different variations of the homogeneous leptonic jet model for the production of high-energy radiation from blazars. We find that a two-component γ-ray spectrum, consisting of a synchrotron self-Compton and an external Compton component, is required in order to yield an acceptable fit to the broadb...
متن کاملar X iv : a st ro - p h / 99 10 53 6 v 1 2 9 O ct 1 99 9 Effect of intergalactic absorption in the TeV γ - ray spectrum of Mkn 501
We discuss an effect of the intergalactic absorption of the TeV γ-rays in time-averaged spectrum of Mkn 501 measured by the HEGRA collaboration. Analysis of the spectral behavior, variability time scale and relevant calculations of TeV γ-ray emission allow to conclude the presence of a noticeable absorption of the TeV γ-rays in the Mkn 501 energy spectrum.
متن کاملar X iv : a st ro - p h / 99 04 06 2 v 1 5 A pr 1 99 9 CBR Polarization Experiments
A handful of new experiments aimed at measuring the asyet-undetected polarization of the cosmic background radiation (CBR) are described, with somewhat more detail given for three experiments with which the authors are associated.
متن کاملar X iv : a st ro - p h / 94 03 01 4 v 1 8 M ar 1 99 4 THE NEAR – IR – OPTICAL – UV EMISSION OF BL LACERTAE OBJECTS
Near–infrared, optical and ultraviolet quasi–simultaneous observations of 11 BL Lacertae objects are reported. For all but one source the dereddened spectral flux distribution in the 8 · 10 13 − 2 · 10 15 Hz frequency range can be described by a single power law f ν ∝ ν −α with average spectral index < α > = 0.88 ± 0.42 (standard deviation) plus, where relevant, the contribution of the host gal...
متن کامل