Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...274l..25m&link_type=abstract
Astronomy and Astrophysics, Vol. 274, NO. 1/JUL(I), P. L25, 1993
Astronomy and Astrophysics
Astrophysics
8
Scientific paper
B and V-band, or multicolor surface photometry of 24 highly- inclined S0 galaxies shows frequent asymmetries in the luminosity profiles. A class of minor-axis asymmetries with amplitude increasing blueward may be interpreted as internal absorption of the bulge light by an extended, galaxian-size equatorial dust layer; this phenomenon might occur in 40-50% of S0s. The modelling of two representative objects shows the data to be consistent with an obscuration of the order of A_v_ = 0.1 magnitude (corrected to face-on), with possibly a ring-like geometry of the dust layer, similar to the H I distribution observed in many S0s. However, our data do not put tight constraints on the spatial distribution of the absorbing material, except on its characteristic scale, and we are unable to discriminate between a continuous and a patchy layer.
Michard Raymond
Simien Francois
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