Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...226l.119o&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 226, Dec. 15, 1978, p. L119-L123. NSF-supported research.
Astronomy and Astrophysics
Astrophysics
59
Astronomical Maps, Galactic Structure, Interstellar Matter, Radio Galaxies, Antenna Arrays, Astronomical Models, Brightness, Galactic Nuclei, Morphology, Radio Telescopes
Scientific paper
Observations are presented of the head-tail radio galaxy NGC 1265, made with the VLA at 4886 MHz. The total intensity brightness distribution has a resolution of 1 x 1.5 arcsec and an rms noise of about 150 micro-Jy/beam area. These observations, combined with data at 2695 and 8085 MHz on a 35-km baseline in Green Bank, show that the nuclear component is less than 0.1 arcsec and has a slightly inverted spectrum. The VLA map reveals a narrow continuous stream of emission leading away from the nucleus and out into the lower-surface-brightness tail. Several small knots are superposed on the stream. This brightness distribution is compared with the independent-blob model of Jaffe and Perola (1973). It is found that the brightness distribution predicted by this model does not agree well with the observed brightness distribution. It is suggested that a hot interstellar medium in the galaxy may be necessary to explain the complex structure.
Burns O. Jr. J.
Owen Frazer N.
Rudnick Lawrence
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