Abstract
During a survey of the galactic plane at a frequency 0.610 GHz, Hughes et al.1 discovered a new supernova remnant (SNR G109.1 – 1.0) which had already been detected as a radio source (CTB109) at 960 MHz by Wilson and Bolton2. Optical observations by Hughes et al.1 reveal filamentary structures, and a large [SII]/Hα characteristic of SNRs has been measured by Blair and Kirschner3. Gregory and Fahlman4, using the Einstein X-ray Observatory, found at the position of the SNR an extraordinary new X-ray source. Their X-ray picture shows a clear semicircular arc with an angular diameter of 36 arc min which seems to be the outer shell of the SNR. Emerging from the east side of the central X-ray source GF2259 + 586 is a jet-like structure which curves northwards in another continuous arc smoothly joining the outer shell. From a number of common apparent features Gregory and Fahlman4 suspect another object of the same class as SS433. Here we report recent observations of the complex Sh2 – 147/Sh2 – 153 (see ref. 5) in the molecular line 13CO (J = 1→0) carried out with the newly developed POM telescope of the Bordeaux Observatory. Our results are compared with those of Israel6 in 12CO. Several lines of evidence point to a physical association of SNR G109.1 – 1.0 and the X-ray source GF2259 + 586 with the molecular cloud of Sh2 – 152, as it has already been observed, for example, for IC443 and the Cygnus Loop7.
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References
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Heydari-Malayeri, M., Kahane, C. & Lucas, R. A relationship between SNR G109.1 – 1.0 and the molecular cloud of Sh2 – 152?. Nature 293, 549–550 (1981). https://doi.org/10.1038/293549a0
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DOI: https://doi.org/10.1038/293549a0
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