Boxy isophotes, discs and dust lanes in elliptical galaxies

Details Boxy isophotes, discs and dust lanes in elliptical galaxies Boxy isophotes, discs and dust lanes in elliptical galaxies

Sep 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.216..429l&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 216, Sept. 15, 1985, p. 429-438.

Astronomy and Astrophysics

Astronomy

118

Cosmic Dust, Disk Galaxies, Elliptical Galaxies, Galactic Rotation, Galactic Structure, Isophotes, Astronomical Photometry, Charge Coupled Devices, Signal To Noise Ratios

Scientific paper

CCD images of 42 elliptical and S0 galaxies are examined for low-contrast structures or subtle distortions of the isophotes from perfect ellipses. 75 percent of the galaxies have isophotes completely describable as concentric ellipses to within the photometry errors. 'Boxy' isophotes, stellar discs, and dust lanes are detected in the remaining 25 percent of the sample. The boxy elliptical galaxies appear dynamically indistinguishable from normal ellipticals and are therefore different from boxy bulges, which rotate rapidly. Most of the galaxies with faint discs, however, appear dynamically similar to S0 galaxies. Nearly edge-on dust lanes are found in four galaxies, which suggests that dust lanes may commonly occur in elliptical galaxies.

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