On the Curvature of Dust Lanes in Galactic Bars

Bibcode
2009ApJ...706L.256C
DOI
10.1088/0004-637X/706/2/L256
Comerón, S.; Martínez-Valpuesta, I.; Knapen, J. H.; Beckman, J. E.
Referencia bibliográfica

The Astrophysical Journal Letters, Volume 706, Issue 2, pp. L256-L259 (2009).

Fecha de publicación:
12
2009
Número de autores
4
Número de autores del IAC
2
Número de citas
28
Número de citas referidas
23
Descripción
We test the theoretical prediction that the straightest dust lanes in bars are found in strongly barred galaxies, or more specifically, that the degree of curvature of the dust lanes is inversely proportional to the strength of the bar. The test uses archival images of barred galaxies for which a reliable nonaxisymmetric torque parameter (Q b) and the radius at which Q b has been measured (r(Q b)) have been published in the literature. Our results confirm the theoretical prediction but show a large spread that cannot be accounted for by measurement errors. We simulate 238 galaxies with different bar and bulge parameters in order to investigate the origin of the spread in the dust lane curvature versus Q b relation. From these simulations, we conclude that the spread is greatly reduced when describing the bar strength as a linear combination of the bar parameters Q b and the quotient of the major and minor axes of the bar, a/b. Thus, we conclude that the dust lane curvature is predominantly determined by the parameters of the bar.
Proyectos relacionados
Poster Almeria Astronomy week
Estudios Cinemáticos, Estructurales y de Composición, de los Medios Interestelares e Intergalácticos

El objetivo básico del proyecto es investigar la evolución de las galaxias mediante el entendimiento de la interacción del medio interestelar y las estrellas. La técnica principal que utilizamos es la cinemática bidimensional de galaxias enteras observada por nuestro instrumento GHaFaS, un interferometro Fabry Perot en el telescopio William

Prof.
John E. Beckman
En ejecución
Project Image
Las Galaxias Espirales: Evolución y Consecuencias

Nuestro grupo pequeño esta bien conocido y respetado internacionalmente por nuestro trabajo inovativo e importante en varios aspectos de la estructura y la evolución de las galaxias espirales cercanas. Usamos principalmente observaciones en varias longitudes de onda, explotando las sinergías que nos permiten responder a las cuestiones más

Johan Hendrik
Knapen Koelstra
En ejecución
Tipo
Con árbitro
Galaxias
Formación y Evolución de Galaxias (FYEG)

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