Collimation of the kiloparsec-scale radio jets in NGC 2663
Jul 14, 202216 pages
Published in:
- Mon.Not.Roy.Astron.Soc. 516 (2022) 2, 1865-1880
- Published: Sep 14, 2022
e-Print:
- 2207.06713 [astro-ph.GA]
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Abstract: (Oxford University Press)
We present the discovery of highly collimated radio jets spanning a total of 355 kpc around the nearby elliptical galaxy NGC 2663, and the possible first detection of recollimation on kiloparsec scales. The small distance to the galaxy (∼28.5 Mpc) allows us to resolve portions of the jets to examine their structure. We combine multiwavelength data: radio observations by the Murchison Widefield Array (MWA), the Australian Square Kilometre Array Pathfinder (ASKAP) and the Australia Telescope Compact Array (ATCA), and X-ray data from Chandra, Swift, and SRG/eROSITA. We present intensity, rotation measure, polarization, spectral index, and X-ray environment maps. Regions of the southern jet show simultaneous narrowing and brightening, which can be interpreted as a signature of the recollimation of the jet by external, environmental pressure, though it is also consistent with intermittent active galactic nuclei or complex internal jet structure. X-ray data suggest that the environment is extremely poor; if the jet is indeed recollimating, the large recollimation scale (40 kpc) is consistent with a slow jet in a low-density environment.Note:
- 16 pages, 14 figures, Accepted for publication in MNRAS
- galaxies: active
- galaxies: jets
- radio continuum: general
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Figures(15)
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