Bibcode
Camps-Fariña, A.; Beckman, J.; Zaragoza-Cardiel, J.; Font, J.; Fathi, K.
Referencia bibliográfica
Galaxies in 3D across the Universe, Proceedings of the International Astronomical Union, IAU Symposium, Volume 309, pp. 303-303
Fecha de publicación:
2
2015
Número de citas
0
Número de citas referidas
0
Descripción
We present a new method for the detection and characterization of large
scale expansion in galaxy discs based on Hα Fabry-Perot
spectroscopy, taking advantage of the high spatial and velocity
resolution of our instrument (GHαFaS). The method analyses
multi-peaked emission line profiles to find expansion along the line of
sight on a pixel-by-pixel basis. At this stage we have centred our
attention on the large scale structures of expansive gas which show a
coherent gradient of velocities from their centres as a result of both
bubble shape and projection effect. The results show a wide range of
expansion velocities in these superbubbles, ranging from 30-150 km/s,
with the expected trend of finding the higher velocities in the more
violent areas of the galaxies. We have applied the technique to the
Antennae and M83, obtaining spectacular results, and used these to
investigate to what extent kinematically derived ages can be found and
used to characterize the ages of their massive star clusters.