Narrow band photography of NGC 5128

Details Narrow band photography of NGC 5128 Narrow band photography of NGC 5128

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....77..141m&link_type=abstract

Astronomy and Astrophysics, vol. 77, no. 1-2, Aug. 1979, p. 141-144.

Astronomy and Astrophysics

Astrophysics

6

Astronomical Photography, Elliptical Galaxies, Nebulae, Radio Galaxies, Emission Spectra, Optical Filters, Photographs

Scientific paper

The paper surveys monochromatic photographs of NGC 5128 (Cen A) obtained through the use of narrow band interference filters. The central wavelengths of the seven filters between 3750 and 6945 A were placed on or between the forbidden emission lines of O II, O III, N II and H-alpha. Twenty nine new emission nebulae were identified and strong emission in the H-alpha plus forbidden N II feature was observed while the forbidden O III lines were found to be comparatively weak. In addition some emission nebula surround very luminous blue objects. It is concluded that if these objects are single O or B stars their brightness must be of an absolute photographic magnitude of about -9

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