A giant radio galaxy with three cycles of episodic jet activity from LoTSS DR2

Bibcode
2023MNRAS.525L..87C
DOI
10.1093/mnrasl/slad100
Chavan, Kshitij; Dabhade, Pratik; Saikia, D. J.
Bibliographical reference

Monthly Notices of the Royal Astronomical Society

Advertised on:
10
2023
Journal
Monthly Notices of the Royal Astronomical Society
Number of authors
3
IAC number of authors
1
Citations
7
Refereed citations
6
Description
The excellent sensitivity and optimum resolution of LoTSS DR2 at 144 MHz has enabled us to discover a giant radio galaxy (J1225+4011) with three distinct episodes of jet activity, making it a member of a class of objects called triple-double radio galaxies (TDRGs). The source extends overall up to 1.35 Mpc in projected size, with the second episode extending to 572 kpc, and the inner episode to 118 kpc. J1225+4011 is only the fourth radio source showing a triple-double radio structure. All four sources have overall sizes greater than 700 kpc, making them giants. We also present the LoTSS 144 MHz map of the TDRG J0929+4146 and report its updated size. Lastly, we have summarized and discussed the radio properties of all TDRGs for the first time to understand their growth and evolution. Our observations suggest that the power of their jets may decrease with time.
Related projects
Project Image
The Central PARSEC of Galaxies using High Spatial Resolution Techniques
PARSEC is a multi-wavelength investigation of the central PARSEC of the nearest galaxies. We work on black-hole accretion and its most energetic manifestations: jets and hot spots, and on its circumnuclear environment conditions for star formation. We resort to the highest available angular resolution observations from gamma-rays to the centimetre
Almudena
Prieto Escudero
In progress
Type
Refereed
Formation & Evolution of Galaxies (FYEG)
Galaxies
Jets

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