2D spectroscopy of double-barred galaxies

Details 2D spectroscopy of double-barred galaxies 2D spectroscopy of double-barred galaxies

2002-02-09

arxiv.org/abs/astro-ph/0202192v2

Astronomy and Astrophysics

Astrophysics

to appear in ASP Conf. Ser. "Galaxies: The Third Dimension", Eds. M. Rosado, L. Binette, and L. Arias. "Authors" data field ar

Scientific paper

The first results of the observational program of the study of 2D-kinematics in double-barred galaxies are presented. We show that, for the main part of the sample, the inner bars do not affect the circumnuclear stellar kinematics. Therefore, they are not dynamically decoupled structures. Various types of non-circular gas motion were found in many galaxies. The analysis of the ground-based and HST optical and NIR images reveals mini-spirals in about half of the investigated objects. We suggest that so called ``double-barred galaxies'' are, in fact, galaxies with very different circumnuclear structure.

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