Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...138..385k&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 138, no. 2, Sept. 1984, p. 385-395.
Astronomy and Astrophysics
Astronomy
42
Interstellar Magnetic Fields, Radio Astronomy, Spectral Energy Distribution, Spiral Galaxies, Centimeter Waves, Continuous Radiation, Emission Spectra, Faraday Effect, Linear Polarization, Magnetic Flux, Radiant Flux Density
Scientific paper
The spiral galaxy NGC 4258 was scanned at 4.75 and 10.7 GHz using the Effelsberg 100 m telescope to map the HF surface morphology and faint extended emissions. Total intensity and linear polarization maps were generated at both frequencies, as were an integrated spectrum and the distribution of the spectral index over the whole galaxy. The whole galaxy spectral index was in the -1.11 to -0.97 range. Scanning across two previously identified radio arms revealed no spectral index variations. The terminations of the arms did, however, exhibit linear polarizations of nearly 50 percent at 10.7 GHz, the strongest polarization observed. It is suggested that the magnetic field aligns with and is normal to the arms, which contain protons and electrons. The core of the object is mainly electrons and positrons. The anomalous arms are entirely within the galaxy.
Beck Rainer
Klein Ulf
Krause Marita
No associations
LandOfFree
The atypical galaxy NGC 4258 at high radio frequencies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The atypical galaxy NGC 4258 at high radio frequencies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The atypical galaxy NGC 4258 at high radio frequencies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1389519