Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jkas...21..133k&link_type=abstract
Journal of the Korean Astronomical Society, vol. 21, p. 133-153
Astronomy and Astrophysics
Astronomy
3
Scientific paper
Linear polarization has been measured for fifteen extragalactic radio sources in the field of supernova remnant 2 147. These observations were made at 4885, 4835, 1665, 1515, 1465, and 1385 MHz using the Very Large Array, primarily to determine unambiguous Rotation Measure (RM) of the sources. This yields a total of 11 new RM sources. Comparisons of a sample of sources which are seen through 2 147 were made with sources located farther away. The result tentatively indicates that the distribution of the rotation measure of the former population is broadened, with more than a 85% level of confidence. This constitutes evidence that there is a SNR contribution to rotation measure in sources seen through the SNR. Limits on this RM contribution are statistically at 30<|RM|<70 rad m^-2 with a 85% statistical level of confidence. These result imply the magnetic field in the rim of S 147 has strength 10 microgauss if the electron density is 1 cm^-3.
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