NGC 1068 - Resolution of nuclear structure in the optical continuum

Details NGC 1068 - Resolution of nuclear structure in the optical continuum NGC 1068 - Resolution of nuclear structure in the optical continuum

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...369l..31l&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 369, March 10, 1991, p. L31-L34.

Other

45

Continuous Spectra, Galactic Nuclei, Seyfert Galaxies, Spectral Resolution, Visible Spectrum, Emission Spectra, Forbidden Transitions, Hubble Space Telescope, Molecular Clouds, Oxygen Spectra, Point Spread Functions

Scientific paper

The HST Planetary Camera has been used to obtain an optical continuum image of the Seyfert galaxy NGC 1068. The image reveals a bright nucleus embedded in an irregular cloudlike structure which is well-differentiated against the background of the galaxy. The nucleus is resolved, with an FWHM of about 0.15 arcsec, or 11 pc. There is no evidence for any unresolved nuclear component. The precise geometry of the scattering region cannot yet be inferred. The cloud surrounding the nucleus is elongated in the NE-SSW direction and has extreme dimensions of 3.5 arcsec x 1.7 arcsec. The brightness centroid is situated 0.4 arcsec SW of the nucleus. It is concluded that the light from the cloud is contributed largely by stars, but that the appearance of the cloud is distinctly dissimilar to what is expected from young or old stellar systems and bears to simple relationship to the numerous features that have heretofore been resolved at other wavelengths.

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