一个巨大的射电星系，从LoTSS DR2有三个周期的间歇性喷流活动

Q1 Earth and Planetary Sciences

Monthly Notices of the Royal Astronomical Society: Letters Pub Date : 2023-07-17 DOI:10.1093/mnrasl/slad100

Kshitij Chavan, P. Dabhade, D. Saikia

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引用次数: 1

摘要

LoTSS DR2在144兆赫的出色灵敏度和最佳分辨率使我们能够发现一个巨大的射电星系(J1225+4011)，它有三个不同的喷流活动，使它成为一类被称为三双射电星系(TDRGs)的成员。来源总体上预计将扩大到1.35 Mpc，第二集将扩大到572 kpc，内部集将扩大到118 kpc。J1225+4011是第四个显示出三双射电结构的射电源。这四个源的总容量都大于700kpc，使它们成为巨人。我们还提出了TDRG J0929+4146的LoTSS 144 MHz图，并报告了其更新的尺寸。最后，我们首次总结和讨论了所有tdrg的无线电特性，以了解它们的生长和演化。我们的观察表明，它们喷射的力量可能会随着时间的推移而减弱。

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

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 summarised 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.

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来源期刊

Monthly Notices of the Royal Astronomical Society: Letters Earth and Planetary Sciences-Space and Planetary Science

CiteScore

8.80

自引率

0.00%

发文量

136

期刊介绍： For papers that merit urgent publication, MNRAS Letters, the online section of Monthly Notices of the Royal Astronomical Society, publishes short, topical and significant research in all fields of astronomy. Letters should be self-contained and describe the results of an original study whose rapid publication might be expected to have a significant influence on the subsequent development of research in the associated subject area. The 5-page limit must be respected. Authors are required to state their reasons for seeking publication in the form of a Letter when submitting their manuscript.