Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984natur.310..568s&link_type=abstract
Nature (ISSN 0028-0836), vol. 310, Aug. 16, 1984, p. 568, 569.
Astronomy and Astrophysics
Astronomy
129
Galactic Nuclei, Galactic Radio Waves, Galactic Structure, Milky Way Galaxy, Radio Sources (Astronomy), Astronomical Maps, Brightness Distribution, Continuous Spectra, Hydrogen Clouds, Nebulae
Scientific paper
A prominent off-plane radio lobe structure above the galactic nucleus, revealed during a 10 GHz continuum survey of the galactic plane, is reported. The lobe has steeper gradients of radio emission toward the outer edges. Cross sections of the lobe show a brightness distribution typical of a compressed shell, which may indicate that the lobe is a result of an explosive or an energetic outflow phenomenon. The background component of the cross section has a steep spectral index, which indicates a nonthermal origin; the flat spectrum of the lobe component suggest thermal radiation from an ionized gas. Two possible formation mechanisms for the formation of the lobe are briefly discussed: channeled exhaust from the nuclear disk, and galactic loop prominence.
Handa Toshihiro
Sofue Yoshiaki
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