English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present original GMRT radio observations of the galaxy cluster Abell~725,at a redshift of 0.09, along with other archival observations. Our GMRT mapsreveal two steep-spectrum diffuse filaments in the cluster, along with apreviously reported arc-like structure, and a wide-angle tail (WAT) radiosource associated with the Brightest Cluster Galaxy (BCG) at the periphery ofthe cluster. The bent morphology of the WAT indicates that its jets have beenswept back by the dynamic pressure resulting from the motion of the BCG throughthe surrounding intracluster medium. The BCG associated with the WAT hosts ablack hole whose mass we estimate to be 1.4$\pm0.4 \times10^{9} \Msun$. Weobserve a 2\arcmin (195\,kpc in projection) offset between the BCG and theX-ray centroid of the galaxy cluster, which, along with other dynamic features,indicates the cluster's early stage of evolution. The WAT radio galaxy, the arcand the filaments have spectral indices $\alpha_{612}^{240}= -0.46\pm 0.15$,$-0.8\pm0.3$, and ($-1.13\pm 0.48$, $-1.40\pm 0.50$), respectively. The WAT andthe arc are connected structures, while the filaments are detached from them,but are found to be along the trail of the WAT. Based on the morphology of thecomponents, and the progressive steepening of the components from the core ofthe WAT to the filaments, we propose that this system is a radio galaxy withtrailing antique filaments.

GMRT unveils steep-spectrum antique filaments in the galaxy cluster Abell 725