Contenidos
Imágenes
Subir su imagen
DSS Images Other Images
Artículos relacionados
Structure and kinematics of edge-on galaxy discs - I. Observations of the stellar kinematics
We present deep optical long-slit spectra of 17 edge-on spiral galaxiesof intermediate to late morphological type, mostly parallel to theirmajor axes and in a few cases parallel to the minor axes. Theline-of-sight stellar kinematics are obtained from the stellarabsorption lines using the improved cross-correlation technique. Ingeneral, the stellar kinematics are regular and can be traced well intothe disc-dominated region. The mean stellar velocity curves are far fromsolid-body, indicating that the effect of dust extinction is not large.The line-of-sight stellar disc velocity dispersion correlates with thegalaxy maximum rotational velocity, but detailed modelling is necessaryto establish whether this represents a physical relation. In fourspirals with a boxy- or peanut-shaped bulge we are able to detectasymmetric velocity distributions, having a common signature withprojected radius in the mean line-of-sight velocity and theh3 and h4 curves. In two cases this kinematicasymmetry probably represents the `figure-of-eight' pattern synonymouswith a barred potential. We emphasize, however, that the signatures seenin the h3 and h4 curves may also be due to thedisc seen in projection.
|
Enviar un nuevo artículo
Enlaces relacionados
- - No se han encontrado enlaces -
En viar un nuevo enlace
Miembro de los siguientes grupos:
|
Datos observacionales y astrométricos
| Constelación: | Vela |
| Ascensión Recta: | 10h11m58.14s |
| Declinación: | -45°38'49.5" |
| Magnitud Aparente: | 8.585 |
| Distancia: | 229.885 parsecs |
| Movimiento Propio en Ascensión Recta: | -30.1 |
| Movimiento Propio en Declinación: | 5.3 |
| B-T magnitude: | 9.851 |
| V-T magnitude: | 8.69 |
Catálogos y designaciones:
|
