High-resolution radio observations of the supernova remnants CTB 104A (G93.7-0.3) and 3C 434.1 (G94.0 + 1.0)

Details High-resolution radio observations of the supernova remnants CTB 104A (G93.7-0.3) and 3C 434.1 (G94.0 + 1.0) High-resolution radio observations of the supernova remnants CTB 104A (G93.7-0.3) and 3C 434.1 (G94.0 + 1.0)

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90.1082l&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 90, June 1985, p. 1082-1093.

Astronomy and Astrophysics

Astronomy

21

Astronomical Maps, Radio Emission, Radio Sources (Astronomy), Supernova Remnants, Angular Resolution, Astronomical Coordinates, Continuous Spectra, Extragalactic Radio Sources, H Lines, Interstellar Gas, Radiant Flux Density

Scientific paper

Radio emission from the SNRs CTB 104A (G94.3-0.3) and 3C 434.1 (G94.0 + 1.0) has been mapped with the DRAO Synthesis Telescope with 1-arcmin resolution at 21-cm wavelength. Both remnants show features characteristic of shell SNRs and are best classified as such. CTB 104A has a thick shell and considerable central emission. Several prominences, which extend beyond the shell, are interpreted as places where the SNR shock has encountered low-density regions of the ISM. Two compact sources within CTB 104A have been observed with the VLA. Continuum and H I absorption observations show them to be unrelated to the SNR and probably extragalactic. 3C 434.1 has a steep boundary and mostly circular outline. Its strongest emission is within the shell, but is probably a combination of projected shell emission and a superimposed extragalactic source. A list of small-diameter sources in the vicinity of these remnants is given.

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