Optical and radio imaging of the supernova remnant VRO 42.05.01 (G166.0 + 4.3)

Details Optical and radio imaging of the supernova remnant VRO 42.05.01 (G166.0 + 4.3) Optical and radio imaging of the supernova remnant VRO 42.05.01 (G166.0 + 4.3)

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...151...52p&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 151, no. 1, Oct. 1985, p. 52-60.

Astronomy and Astrophysics

Astronomy

15

Astronomical Photography, Continuous Spectra, Interstellar Matter, Line Spectra, Radio Sources (Astronomy), Supernova Remnants, Astronomical Models, Emission Spectra

Scientific paper

High resolution interference filter photographs are presented of the supernova remnant (SNR) VRO 42.05.01 (G166.0 + 4.3) showing H-alpha + forbidden line N II and S II emission. These images are compared with new 21-cm continuum maps of the SNR with 20-arcsec resolution. Optical line intensity ratios observed in the SNR are discussed, and a model is developed for the evolution of the remnant in a three-component interstellar medium (ISM) comprising clouds interspersed with hot tunnels or cavities. The SNR is seen to be 'breaking out' from a higher density warm medium into a hotter, low density tunnel. It is argued that the unusual morphology of VRO 42.05.01 is directly attributable to the structure of the ISM in the neighborhood of the supernova explosion. In a search for an optical remnant star in the central 12 arcmin of the remnant, no object was detected brighter than B = 22.0, which was bluer than spectral type A0.

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