Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.218..615g&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 218, Feb. 15, 1986, p. 615-627.
Astronomy and Astrophysics
Astronomy
23
Astronomical Maps, Galactic Nuclei, High Resolution, Infrared Astronomy, Near Infrared Radiation, Spectral Energy Distribution, Charge Coupled Devices, H Alpha Line, Radio Spectra, Visible Spectrum, X Ray Spectra
Scientific paper
High-resolution near-IR maps of the nucleus of Cen A show a pronounced asymmetry for wavelengths of 1.2 and 1.6 μm. The axis of this extension lies perpendicular to the dust lane along the X-ray jet axis. Comparisons with CCD images show the optical nucleus to lie 5.8±0.3 arcsec to the NE of the 2.2-μm nucleus at PA ≡ 45°, so it may possibly be identified as source N on the VLA radio maps. The 2.2-μm source is tentatively identified with a faint object on an Hα photograph and must be considered to be the true or principal nucleus of Cen A. The radial intensity of the 2.2-μm source is well fitted by de Vaucouleurs' law to within 1 - 2 arcsec of the nucleus and radial J-H/H-K variations show the existence of a ≡24-arcsec diameter core within the optical dust lane.
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