Three-dimensional decomposition of galaxies with bulge and long bar

Bibcode
2014A&A...571A..98C
DOI
10.1051/0004-6361/201424572
Compère, P.; López-Corredoira, M.; Garzón, F.
Referencia bibliográfica

Astronomy and Astrophysics, Volume 571, id.A98, 8 pp.

Fecha de publicación:
11
2014
Revista
Astronomy and Astrophysics
Número de autores
3
Número de autores del IAC
3
Número de citas
7
Número de citas referidas
6
Descripción
Context. Some observations indicate that the Milky Way has two inner components, a bulge and a long bar, which present a misalignment of Δα ≃ 20° that is against the predictions of some theoretical models that are based on numerical simulations. Aims: We wish to determine whether this misalignment between the bar and the bulge can be observed in barred galaxies other than the Milky Way. Methods: Each galaxy of our sample was decomposed based on its Ks-band 2MASS image by fitting and modelling in a three-dimensional (3D) space the following components: a disc, a bar, and a bulge. The χ2 goodness-of-fit estimation allowed retrieving the best-fit angle values for the bar and the bulge to detect any misalignment. Results: From the 3D decomposition of six barred galaxies, we have detected at least three galaxies (NGC 2217, NGC 3992, and NGC 4593) that present a significant misalignment between the bar and the bulge of Δα> 20°.
Proyectos relacionados
Project Image
Morfología y dinámica de la Vía Láctea

El Proyecto se estructura en dos partes, diferenciadas pero complementarias: morfología y dinámica. El estudio detallado de la morfología de la Vía Láctea pretende proveer una base de datos de distribución estelar en las regiones más alejadas y extintas de nuestra Galaxia, mediante el desarrollo de modelos semiempíricos a partir de la información

Martín
López Corredoira
En ejecución
Tipo
Con árbitro
Galaxias
La Vía Láctea y el Grupo Local (MWLG)

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