Reassessment of an origin of the radio structure of J1420-0545
arXiv:1711.05200 · doi:10.3847/1538-4357/aa9182
Abstract
In this paper, we test the possibility that the structure of the largest radio galaxy J1420-0545 may have been formed by restarted rather than primary jet activity. This hypothesis was motivated by the unusual morphological properties of the source consisting of two edge-brightened, narrow, highly collinear, and symmetric lobes, thus suggesting an almost ballistic propagation of powerful jets into a particularly low-density external medium. New observations made with the VLA together with the currently available GLEAM and TGSS ADR1 data releases allow the detection of an excess emission at low frequencies. An extracted part (88 MHz - 200 MHz) of the spectrum of the emission is fitted with the DYNAGE model, giving a forecast for the environmental conditions and the energetic requirements for the presumed old cocoon related to a preceding epoch of jet activity.
8 pages, 3 figures, 3 tables
References in corpus (7)
- GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey I: A low-frequency extragalactic catalogue
- The Very Large Array Low-frequency Sky Survey Redux (VLSSr)
- Luminosity function, sizes and FR dichotomy of radio-loud AGN
- A method of estimation of the dynamical age of FR II-type radio sources from multifrequency data
- PKS B1545-321: Bow shocks of a relativistic jet?
- Dynamical analysis of the complex radio structure in 3C 293: Clues on a rapid jet realignment in X-shaped radio galaxies
- A dynamical model for FR II type radio sources with terminated jet activity