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High Velocity HI Jet-like Feature Towards the SNR Candidate G351.7-1.2

We present the HI 21 cm spectral line and continuum observations of the Galactic supernova remnant candidate G351.7-1.2 using the upgraded Giant Metrewave Radio Telescope. Strong absorption features are observed towards the HII regions in the star forming complex associated with G351.7-1.2. Along with HI emission towards the outer periphery of the supernova remnant shell, we distinguish a high velocity jet-like feature in the velocity range +40 km/s to +52 km/s in HI. This unusual and highly collimated feature, with a projected length of ~7 pc and an opening angle of 14.4 deg, is located towards the interior of the radio shell. This is the first report of a such a well collimated HI jet-like emission. The peculiar location and the detection of a gamma-ray source towards the central peak of this HI jet suggests its plausible association with the supernova remnant candidate.

preprint2019arXivOpen access
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