A Polar-nulceus Dark Lane in the Barred Spiral M83: Three-dimensional Accretion in the Nucleus
نویسنده
چکیده
The central region of the barred spiral galaxy M83 reveals a polar-nucleus dust lane, which extends from the NE molecular bar and crosses the central bulge. Its SW counterpart is not visible, being hidden behind the bulge. This asymmetry, in spite of the galaxy’s face-on orientation and the symmetric bar structure in the CO-line emission, indicates that the dark lane is an off-plane structure. Such a “polar-nucleus” structure can be formed by a non-coplanar, three-dimensional accretion in a warped disk. Subject Headings: Accretion; three-dimensional – Dust lane – Galaxies; barred – Galaxies; individual (M83) – Galaxies; nuclei.
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