New shell radio supernova remnant G16.2-2.7

Details New shell radio supernova remnant G16.2-2.7 New shell radio supernova remnant G16.2-2.7

1999-11-03

arxiv.org/abs/astro-ph/9911038v1

Astronomy and Astrophysics

Astrophysics

4 pages, LaTeX, 5 Postscript figures, accepted for publication in AA (Letters)

Scientific paper

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 alpha=-0.51, with S_nu(1 GHz) = 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 shell-like 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 D_max = 18.4' and the width Delta_R=1' are fitted with the model of a spherical optically thin hollow shell. The surface brightness of G16.2-2.7: Sigma(1GHz)= (1+-0.1)10^{-21} W Hz^{-1}m^{-2}sr^{-1}. The peaks in the shell arcs are highly polarized at 1.4 GHz.

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