On the Lorentz Factor of Superluminal Sources
Chika Christian Onuchukwu, Augustine Anyaegbunam Ubachukwu
TL;DR
This paper analyzes the properties of superluminal sources, revealing correlations between component sizes and distances, and estimates Lorentz factors for different types of active galactic nuclei, highlighting lower Lorentz factors in BL Lac objects.
Contribution
It provides the first estimates of Lorentz factors for superluminal sources based on component size and distance correlations, assuming free adiabatic expansion.
Findings
Strong correlation between component size and distance from core.
Estimated Lorentz factors: 7-17 for quasars, 6-13 for galaxies, 4-9 for BL Lac objects.
BL Lac objects have the lowest Lorentz factors among the studied sources.
Abstract
We investigate the properties of features seen within superluminal sources often referred to as components. Our result indicates a fairly strong correlation of r=0.6 for quasars, r=0.4 for galaxies, and r=0.8 for BL Lac objects in our sample between component sizes and distances from the stationary core. Assumption of free adiabatic expanding plasma enabled us to constrain in general the Lorentz factor for superluminal sources. Ourestimated Lorentz factor of 7 - 17 for quasars, 6 - 13 for galaxies and 4- 9 for BL Lac objects indicate that BL Lac have the lowest range of Lorentz factor.
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