MeerKAT 1.3 GHz Observations of the Wide Angle Tail Radio Galaxy J1712$-$2435
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912513143078912 |
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| author | Cotton, William Giri, Gourab Agnihotri, P. J. Saikia, D. J. Thorat, K. Camilo, F. |
| author_facet | Cotton, William Giri, Gourab Agnihotri, P. J. Saikia, D. J. Thorat, K. Camilo, F. |
| contents | We present full polarization MeerKAT images of the wide-angle tail, giant radio galaxy J1712$-$2435 at 1.3 GHz with 7.\asec5 resolution and an RMS sensitivity of 8 $μ$Jy beam$^{-1}$. Due to the angular proximity to the Galactic Center (l=359.6$^\circ$, b=+8.5$^\circ$) the immediate environment is not well understood but there are massive clusters nearby. Emission can be traced over an extent of 34.\amin6 which at the redshift of 0.024330 corresponds to a projected length of 1.02 Mpc. The inner jets are quite straight but then bend and completely decollimate into extended plumes nearly orthogonal to the initial jet directions at a projected distance of approximately 100 kpc. The nearly unity brightness ratio of the inner jets suggest that they are orientated within a few degrees of the plane of the sky. The 1400 MHz power is 3.9$\times 10^{24}$ W Hz$^{-1}$, somewhat below the FRI/FRII divide. The total power emitted is estimated to be 5.6$\times 10^{41}$ erg sec$^{-1}$ over the range 10 MHz to 100 GHz. The source dynamics are modeled with magneto-hydrodynamics simulations; the result is a rough reproduction of the source's radio morphology / appearance. This study further highlights the merit of alternative scenarios, calling for future observational and numerical efforts. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2507_23463 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | MeerKAT 1.3 GHz Observations of the Wide Angle Tail Radio Galaxy J1712$-$2435 Cotton, William Giri, Gourab Agnihotri, P. J. Saikia, D. J. Thorat, K. Camilo, F. Astrophysics of Galaxies We present full polarization MeerKAT images of the wide-angle tail, giant radio galaxy J1712$-$2435 at 1.3 GHz with 7.\asec5 resolution and an RMS sensitivity of 8 $μ$Jy beam$^{-1}$. Due to the angular proximity to the Galactic Center (l=359.6$^\circ$, b=+8.5$^\circ$) the immediate environment is not well understood but there are massive clusters nearby. Emission can be traced over an extent of 34.\amin6 which at the redshift of 0.024330 corresponds to a projected length of 1.02 Mpc. The inner jets are quite straight but then bend and completely decollimate into extended plumes nearly orthogonal to the initial jet directions at a projected distance of approximately 100 kpc. The nearly unity brightness ratio of the inner jets suggest that they are orientated within a few degrees of the plane of the sky. The 1400 MHz power is 3.9$\times 10^{24}$ W Hz$^{-1}$, somewhat below the FRI/FRII divide. The total power emitted is estimated to be 5.6$\times 10^{41}$ erg sec$^{-1}$ over the range 10 MHz to 100 GHz. The source dynamics are modeled with magneto-hydrodynamics simulations; the result is a rough reproduction of the source's radio morphology / appearance. This study further highlights the merit of alternative scenarios, calling for future observational and numerical efforts. |
| title | MeerKAT 1.3 GHz Observations of the Wide Angle Tail Radio Galaxy J1712$-$2435 |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2507.23463 |