Large-scale bent radio jet detected in galaxy cluster Abell 514

Astronomers have performed deep low-frequency radio observations of the galaxy cluster Abell 514, utilizing the upgraded Large Metrewave Radio Telescope (uGMRT). Of their outcomes, they detected a large-scale bent radio jet on this cluster. The discovering is reported in a paper revealed October 2 on the pre-print server arXiv.

Galaxy clusters are the biggest gravitationally sure buildings, consisting of as much as 1000’s of galaxies sure collectively by gravity. They might be essential in bettering the data about large-scale construction formation and evolution of the universe.

Abell 514 (or A514 for brief) is a merging galaxy cluster at a redshift of roughly 0.07, found in 1958. It has a mass of about 300 trillion solar masses, general temperature of three.8 keV, and its metallicity is estimated to be at a degree of 0.22. Earlier observations of A514 have discovered that it has a wealthy morphology and hosts a number of prolonged radio sources.

Lately, a workforce of astronomers led by Wonki Lee of the Yonsei College in Seoul, South Korea, determined to research the radio sources in A514 by performing radio observations of this cluster with uGMRT.

“We noticed A514 utilizing uGMRT Band 2 (125−250 MHz), Band 3 (250−500 MHz), and Band 4 (550−850 MHz) with on-source integration occasions of three.5, 3.7, and 4.3 hours, respectively,” the researchers defined.

The observations discovered that radio emissions from certainly one of three radio galaxies in A514, designated PKS 0446-20, originates from the 2 radio lobes of the lively galactic nucleus (AGN) and extends towards the southern periphery. The most important linear measurement of this bent jet was measured to be about 2.3 million light years.

The pictures obtained with uGMRT present that two radio lobes are related to the 1,300-light-years-long north-south construction that was dubbed “the bridge.” The southern finish of the bridge connects with the 1,000-light-years-long “arc,” which is concave towards the cluster heart. The japanese finish of the arc seems to the touch the northern finish of the 1,300-light-years-long tail.

The observations additionally detected a discontinuity in X-ray floor brightness and excessive polarization on the location of the prolonged radio emission in A514. This, in keeping with the authors of the paper, is a results of the jet plasma redistribution alongside the chilly entrance of the current cluster merger.

The researchers defined {that a} passive plasma bubble, injected throughout an off-axis cluster merger, can endure stretching alongside the chilly entrance of the infalling cluster.

“This stretching course of ends in an prolonged radio emission that resembles the statement in A514. On the late merger phase, the bubble redistributes on the cluster outskirt with its elongation aligned tangential to the cluster,” the scientists concluded.

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