We present new high-spectral-resolution MeerKAT observations of $\textrm {H}\, \scriptstyle \mathrm{I}$ absorption against the central region of the restarted, giant, X-shaped radio galaxy PKS2014-55, which exhibits morphological evidence of three… Click to show full abstract
We present new high-spectral-resolution MeerKAT observations of $\textrm {H}\, \scriptstyle \mathrm{I}$ absorption against the central region of the restarted, giant, X-shaped radio galaxy PKS2014-55, which exhibits morphological evidence of three distinct cycles of activity. We report a wide component (FWHM 38 ± 7 kms−1) redshifted to 96 ± 50 kms−1, a deep-narrow detection (FWHM 19 ± 6 kms−1) which is redshifted to 160 ± 40 kms−1 and a shallow component (FWHM 22 ± 6 kms−1) redshifted to 240 ± 40 kms−1. One of the three components exceeds the typical rotational velocity of 100 kms−1, suggesting complex kinematics of the inflowing gas. These $\textrm {H}\, \scriptstyle \mathrm{I}$ observations support the correlation between the occurrence of $\textrm {H}\, \scriptstyle \mathrm{I}$ absorption and the rejuvenation of radio activity.
Journal Title: Monthly Notices of the Royal Astronomical Society
Year Published: 2025
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