New shell radio supernova remnant G 16 . 2 − 2 . 7
نویسنده
چکیده
The extended radio source G16.2−2.7 is detected as a new previously uncataloged Galactic supernova remnant. Its non-thermal radio spectrum has spectral index α = −0.51, with Sν(1GHz) = 2.08 Jy, as being measured with the RATAN-600 radio telescope. The NRAO VLA Sky Survey (NVSS) map at 1.4 GHz shows a shelllike bilateral structure. The similar smoothed image from the Effelsberg survey at 2.7 GHz is discussed. The angular diameter 17 of a circular shell is fitted to brightness peaks meanwhile the outer diameter Dmax = 18. 4 and the width ∆R=1 are fitted with the model of a spherical optically thin hollow shell. The surface brightness of G16.2−2.7: Σ(1GHz)= (1 ± 0.1)10WHzmsr. The peaks in the shell arcs are highly polarized at 1.4 GHz.
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