Radio continuum observations of the edge-on disc galaxy NGC 891

Details Radio continuum observations of the edge-on disc galaxy NGC 891 Radio continuum observations of the edge-on disc galaxy NGC 891

Jan 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26a....62..397a&link_type=abstract

Astronomy and Astrophysics, vol. 62, no. 3, Jan. 1978, p. 397-409.

Astronomy and Astrophysics

Astrophysics

134

Emission Spectra, Extragalactic Radio Sources, Galactic Radio Waves, Radio Emission, Angular Distribution, Astronomical Maps, Brightness, Cosmic Rays, Data Reduction, Milky Way Galaxy, Radiant Flux Density, Radiation Distribution

Scientific paper

Observations of radio continuum emission from the edge-on disk galaxy NGC 891 at wavelengths of 49.2, 21.2, and 6.0 cm (610, 1412, and 4995 MHz) are reported. Examination of the spectral-index distributions perpendicular to and along the galaxy's major axis indicates that the central source has a flatter spectrum than the disk and therefore produces a slight flattening of the total spectrum near the nucleus of the galaxy. An extended source is observed in the nucleus, and patchy emission is seen along the optically dark central plane. Attempts are made to explain the variation of spectral index with z-coordinate. Some properties of the radio emission at 21 cm from NGC 891, the Galaxy, and NGC 4631 (another galaxy with high inclination) are compared.

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