NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-04-23 T17:12:40 PDT
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For refcode 1993A&A...269..111S:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
1993A&A...269..111S On the transparency of the inner regions of early-type spiral galaxies F. Simien, V. Morenas, and I.A. Valentijn Observatoire de Lyon (CNRS: URA 300), 9 avenue Charles-Andre, F-69561 St Genis Laval, Cedex, France Ecole Normale Superieure de Lyon, 46 allee d'Italie, F-69364 Lyon, Cedex 07, France Laboratory for Space Research, postbus 800, NL-9700 AV Groningen, The Netherlands Received May 4, accepted August 13,1992 Abstract. Surface photometry of 17 inclined Sa-Sb galaxies with prominent bulges from the ESO-LV Data Base has been analyzed with the aim of detecting the possible effects of a hypothetical absorbing layer bisecting the central bulge. Our method is based on looking for an asymmetry between the photometric profiles of the two semi-minor axes, and is complementary to the surface brightness-inclination test which, for early spirals with bright bulges, is confused by the very presence of these bulges. None of the galaxies in our sample shows evidence of a continuous, near-opaque layer reaching the very center. Our conclusions are strengthened by two additional, well-studied objects, M 31 and M 104; our results indicate a lower obscuration in the central regions of early spirals with strong bulges compared to later types, and contribute to discriminate between competing models of light obscuration within galactic disks. Key words: galaxies: spirals - galaxies: photometry - galaxies: interstellar matter
Retrieve 18 NED objects in this reference.
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