NGC 3521: Stellar counter-rotation induced by a bar component
- Author(s)
- Werner Zeilinger, Juan Carlos Vega Beltran, Maite Rozas, John E. Beckman, Alessandro Pizzella, Enrico Maria Corsini, Francesco Bertola
- Abstract
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.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- Institute of Astrophysics of the Canary Islands, University of Padova
- Journal
- Astrophysics and Space Science
- Volume
- 276
- Pages
- 643-650
- No. of pages
- 8
- ISSN
- 0004-640X
- Publication date
- 2001
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103003 Astronomy
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/ngc-3521-stellar-counterrotation-induced-by-a-bar-component(6493b956-47ef-4412-84af-89386fa302c9).html