The Discovery of a Remnant Radio Galaxy in A2065 Using GMRT
  The upgraded Giant Metrewave Radio Telescope (GMRT) has been used to map the
cluster A2065 at z = 0.0726. We report the discovery of a remnant radio galaxy
at the peripheral cluster region. The spatially resolved radio emission from
the remnant radio galaxy shows an elongated, bar-shaped structure, whose size
is $\approx$ 52$^{\prime\prime}$ $\times$ 110$^{\prime\prime}$ ($\simeq$ 72
$\times$ 152 kpc$^2$). Our study with the multiwavelength GMRT data and
\textit{Chandra} data shows that across the remnant radio galaxy there is a
hint of a surface-brightness edge in the hot X-ray gas. We detect tentative
flattening of the radio spectral index as the old plasma at the near end of the
surface-brightness edge is reinvigorated by the passage of possible shock front
and shows the expected change in radio emission characteristics. We suggest
that the remnant radio galaxy has been seeded by the lobes of the active
galactic nucleus (AGN), hosted by the WISEA J152228.01$+$274141.3 source,
demonstrating the connection between AGNs and remnant radio sources. Although
the number of known remnant radio sources is beginning to increase, we
emphasize the need for better data to understand the physics and nature of
poorly understood remnant radio sources.
