Spectral ages of 34 Myr (WAT) and 21 Myr (HT) are much younger than dynamical ages of 140-700 Myr, indicating IGM interactions and possible re-acceleration.
The VLA-COSMOS Survey: II. Source Catalog of the Large Project
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abstract
The VLA-COSMOS large project is described and its scientific objective is discussed. We present a catalog of ~ 3,600 radio sources found in the 2deg^2 COSMOS field at 1.4 GHz. The observations in the VLA A and C configuration resulted in a resolution of 1.5''x1.4'' and a mean rms noise of ~ 10.5(15) uJy/beam in the central 1(2)deg^2. 80 radio sources are clearly extended consisting of multiple components, and most of them appear to be double-lobed radio galaxies. The astrometry of the catalog has been thoroughly tested and the uncertainty in the relative and absolute astrometry are 130mas and <55mas, respectively.
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astro-ph.CO 1years
2026 1verdicts
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Radio spectral properties and aging of two tailed radio galaxies in a galaxy group at z=0.35
Spectral ages of 34 Myr (WAT) and 21 Myr (HT) are much younger than dynamical ages of 140-700 Myr, indicating IGM interactions and possible re-acceleration.