Bibcode
Blasco-Herrera, J.; Fathi, K.; Östlin, G.; Font, J.; Beckman, J. E.
Bibliographical reference
Monthly Notices of the Royal Astronomical Society, Volume 435, Issue 3, p.1958-1983
Advertised on:
11
2013
Citations
7
Refereed citations
7
Description
We present analysis of Fabry-Perot interferometric observations for a
sample of 11 starburst galaxies with redshift z ≲ 0.03 selected
from the Sloan Digital Sky Survey. We have targeted the Hα
λ 6562.78 emission line at spatial sampling of 0.2arcsec-0.4
arcsec and at spectral resolution of R ˜ 16 000. Studying
two-dimensional maps for the velocity, velocity dispersion, line
emission and continuum deliver new insights into the nature of starburst
and postburst galaxies. The velocity fields are fitted to an exponential
disc model, providing scalelengths and masses, to be compared with the
photometric scalelength and the mass estimated from the velocity
dispersions. From the line emission, the star formation rates are also
calculated and compared with values in the literature. We have found
that between 55 and 64 per cent of our sample show large-scale
dominating rotation, while 27 per cent show local rotation typically
restricted to the central part of each system. The morphology and line
profiles in the centre of eight objects are consistent with a recent
merger, while another two seem to be involved in a accretion process
which, for the moment, has not disrupted their kinematics.
Related projects
Kinematic, Structural and Composition Studies of the Interstellar and Intergalactic Media
The basic objective of the broject is to investigate the evolution of galaxies by deepening our understanding of the interaction between the insterstellar medium and the stars.The main technique which we use is the two-dimensional kinematic study of whole galaxies observed using our instrument:GHaFaS, a Fabry-Perot interferometer on the William
Prof.
John E. Beckman