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- W2002378064 abstract "Aims. We study the spectral and polarization properties of supernova remnants (SNRs) using our λ 6 cm survey data. Methods. We analyse data from observations taken as part of the Sino-German λ 6 cm polarization survey of the Galactic plane. By using the integrated flux densities at λ 6 cm together with measurements at other wavelengths from the literature, we derive the global spectra of 50 SNRs. In addition, from the observations at λ 6 cm we obtain the polarization images of 24 SNRs. Results. We derive integrated flux densities at λ 6 cm for 51 small SNRs with angular sizes smaller than 1°. We are able to derive global radio spectral indices in all the cases except for Cas A. For the SNRs G15.1−1.6, G16.2−2.7, G16.4−0.5, G17.4−2.3, G17.8−2.6, G20.4+0.1, G36.6+2.6, G43.9+1.6, G53.6−2.2, G55.7+3.4, G59.8+1.2, G68.6−1.2, and G113.0+0.2, the spectra have been significantly improved. From our analysis, we argue that the object G16.8−1.1 is probably an H ii region instead of a SNR. Cas A shows a secular decrease in total intensity, and we measure a flux density of 688 ± 35 Jy at λ 6 cm between 2004 and 2008. We detect polarized emission from 25 SNRs. For G16.2−2.7, G69.7+1.0, G84.2−0.8, and G85.9−0.6, the polarized emission is detected for the first time confirming that they are SNRs.Conclusions. High-frequency observations of SNRs are difficult but essential to determine their spectra and measure their polarization in particular towards the inner Galaxy, where Faraday effects are important." @default.
- W2002378064 created "2016-06-24" @default.
- W2002378064 creator A5002756705 @default.
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- W2002378064 creator A5047483791 @default.
- W2002378064 creator A5077669464 @default.
- W2002378064 creator A5090120766 @default.
- W2002378064 date "2011-12-01" @default.
- W2002378064 modified "2023-09-25" @default.
- W2002378064 title "A Sino-German λ6 cm polarization survey of the Galactic plane - VII. Small supernova remnants" @default.
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