Hostname: page-component-78c5997874-g7gxr Total loading time: 0 Render date: 2024-11-13T07:31:53.556Z Has data issue: false hasContentIssue false
  • English
  • Français

Fabry-Perot spectroscopy: a powerful method for detecting superbubbles in galaxy discs

Published online by Cambridge University Press:  09 February 2015

A. Camps-Fariña ,
J. Beckman ,
J. Zaragoza-Cardiel ,
J. Font  and
K. Fathi
A. Camps-Fariña
Affiliation:
Instituto de Astrofísica de Canarias, La Laguna, Spain Departamento de Astrofísica, Universidad de la Laguna, Spain
J. Beckman
Affiliation:
Instituto de Astrofísica de Canarias, La Laguna, Spain Departamento de Astrofísica, Universidad de la Laguna, Spain Consejo Superior de Investigaciones Científicas, Spain
J. Zaragoza-Cardiel
Affiliation:
Instituto de Astrofísica de Canarias, La Laguna, Spain Departamento de Astrofísica, Universidad de la Laguna, Spain
J. Font
Affiliation:
Instituto de Astrofísica de Canarias, La Laguna, Spain Departamento de Astrofísica, Universidad de la Laguna, Spain
K. Fathi
Affiliation:
Department of Astronomy, Stockholm University, Stockholm, Sweden
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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.

Keywords

galaxies: superbubblesgalaxies: kinematicsgalaxies: evolution
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S309: Galaxies in 3D across the Universe , July 2014 , pp. 303
Copyright
Copyright © International Astronomical Union 2015 

References

Goshtasby, A. & O'Neill, W., 1994, Graph. Models Image Process., 56, 281Google Scholar