Axial symmetry of bulges in spiral galaxies

Details Axial symmetry of bulges in spiral galaxies Axial symmetry of bulges in spiral galaxies

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992sval...18..255s&link_type=abstract

Soviet Astronomy Letters, Vol. 18, p. 255; Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 18, no. 8, p. 643-653. In R

Astronomy and Astrophysics

Astronomy

2

Galactic Bulge, Galactic Nuclei, Galactic Structure, Isophotes, Spiral Galaxies, Galactic Rotation, Gas Dynamics, Symmetry

Scientific paper

Results of an investigation of the orientation and ellipticity of isophotes in the central regions of five spiral galaxies with known nuclear gas kinematics are presented. In NGC 615, 7013, and 7331, whose nuclei are dynamically distinguished by their fast circular rotation, no turn of nuclear isophotes' major axis relative to the line of nodes of global galactic disks is found. NGC 2655 and 7217, which are suspected of having strong noncircular gas motions in their nuclei, exhibit this turn; consequently, their bulges do not possess axial symmetry.

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