Ultra relativistic explosion in moving media as a model of superluminal radio jets

1Pasyuga, VN
1Research and Technological Institute of Transcription, Translation and Replication, Kharkiv, Ukraine
Kosm. nauka tehnol. 2001, 7 ;(Suppl. 2):096-100
Section: Space and Atmospheric Physics
Publication Language: English
Super-luminal components of radiojets are identified with luminous segments of ultrarelativistic shock fronts (further SF), moving to the observer, in particular, they can be a vicinity of their leading point. The cases of a local hydrostatic equilibrium, accretion and wind flows of a nonperturbed medium in a field of central object («a black hole»?) are investigated. In the case of the noncentral explosion in a medium, being in a state of a local hydrostatic equilibrium [4], the apparent superluminal velocity (further βapp) of a leading point movement of a shock front (further SF) is asymptotically constant and proportional to a total energy of explosion, according to observational data [2]. In cases of accretion and wind flows the dependences βapp on the distance from a leading point to the nucleus are obtained. In the case of explosion with an energy pumping from a central source we manage to identify the observable times of acceleration of radiojets components with the duration of energy pumping from flares correlating with components [5] according to data [8]. The movement influence of a nonperturbed medium upon the shift of superluminal radiocomponents in a picture plane is discussed.
1. Babadzhanyanz M. K., Belokon' E. T. Optical manifestation of superluminal motion in the quasar 3C 345. Astrofizika, 23, 459—471 (1985) [in Russian].
2. Babadzhanyanz M. K., Belokon' E. T. The new testimonies of a reality of 13-year's phase in optical variability of a quasar 3C 273 and its correlation with observable parameters of a parsec-scale radiojet. Astronomicheskiy Zhurnal, 70 (2), 241—257 (1993) [in Russian].
3. Blandford R. D., McKee C. F. Fluid dynamics of relativistic blast waves. Physics of Fluids, 19 (8), 1130—1138 (1976).
4. Kontorovich V. M., Pasyuga V. N. A shock wave theory of super-luminal outburst from AGN. Odessa Astron. Publ., 12, 90—93 (1999).
5. Kontorovich V. M., Pasyuga V. N., Pimenov S. F. To the shock wave theory of super-luminal jets from AGN. In: JENAM 2000: Abstracts Book, 152 (2000).
6. Shapiro P. R. Relativistic blast waves in two-dimensions. I. The adiabatic case. Astrophys. J., 233 (3), 831 (1979).
7. Vermeulen R. C., Cohen M. H. Superluminal motion statistics and cosmology. Astrophys. J., 430 (1), 467—494 (1994).

8. Zensus J. A. Parsec-scale jets in extragalactic radio sources. Annu. Rev. Astron. and Astrophys., 35, 607—636 (1997).