Bibcode
Zeilinger, W. W.; Vega Beltrán, J. C.; Rozas, M.; Beckman, J. E.; Pizzella, A.; Corsini, E. M.; Bertola, F.
Bibliographical reference
Astrophysics and Space Science, v. 276, Issue 2/4, p. 643-650 (2001).
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3
2001
Journal
Citations
13
Refereed citations
11
Description
The spiral galaxy NGC 3521 exhibits apparently normal kinematic
properties of gas and stars along its major axis. However, the analysis
of the LOSVD reveals strong asymmetries. A decomposition of the LOSVD
data with a two-Gaussian component model shows two counter-rotating
stellar components. The observed kinematic decoupling is interpreted as
a projection effect induced by the presence of a bar component seen
almost end on. The bar produces locally a greater concentration of
retrograde stellar orbits but this does not relate to a specific
counter-rotating population. The signatures of the bar are identified in
the velocity field derived from long-slit spectra obtained along the
major, minor and 45° intermediate axes and from R-band surface
photometry.