High-resolution imaging from Mauna Kea - Cygnus A

Details High-resolution imaging from Mauna Kea - Cygnus A High-resolution imaging from Mauna Kea - Cygnus A

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...279l..47t&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 279, April 15, 1984, p. L47-L49. Research supported

Astronomy and Astrophysics

Astronomy

27

Elliptical Galaxies, Galactic Nuclei, Radio Sources (Astronomy), Astronomical Observatories, Astronomical Photography, Cygnus Constellation

Scientific paper

A high-resolution image of Cygnus A was obtained using a computer-controlled active-mirror autoguider. The CCD image, with FWHM = 0.65 arcsec, reveals considerable structure in the central 2 kpc of Cygnus A: an elliptically shaped region that contains the central radio source, a concentrated knot that looks like an extra galaxy nucleus (which appears in the projection within 900 h(-1) pc of the central radio component), and some indication that the central region around the radio source contains a patchy dust distribution. As originally suggested by Baade and Minkowski (1954), Cygnus A is best described as a collision of galaxies. With the improved resolution, Cygnus A shows only cursory resemblance to Centaurus A.

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