Bibcode
Camps-Fariña, A.; Zaragoza-Cardiel, J.; Beckman, J. E.; Font, J.; García-Lorenzo, B.; Erroz-Ferrer, S.; Amram, P.
Bibliographical reference
Monthly Notices of the Royal Astronomical Society, Volume 447, Issue 4, p.3840-3848
Advertised on:
3
2015
Citations
8
Refereed citations
7
Description
We present a new method for the detection and characterization of
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 multipeaked emission line
profiles to find expansion along the line of sight on a point-by-point
basis. At this stage we have centred our attention on the large-scale
structures of expanding gas associated with H II regions which show a
characteristic pattern of expansion velocities, of the order of 100 km
s-1, as a result of both bubble shape and projection effects.
We show an example of the expansion map obtained with our method from a
superbubble detected in the Antennae galaxies. We use the information
obtained from the method to measure the relevant physical parameters of
the superbubbles, including their ages which can be used to date young
star clusters.
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