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Kinematical evidence for secular evolution in Spitzer Survey of Stellar Structure in Galaxies (S4G) spirals

Published online by Cambridge University Press:  05 March 2015

Santiago Erroz-Ferrer ,
Johan H. Knapen ,
Joan Font ,
John E. Beckman  and
the S4G team
Santiago Erroz-Ferrer
Affiliation:
Instituto de Astrofísica de Canarias, Vía Láctea s/n 38205 La Laguna, Spain Departamento de Astrofísica, Universidad de La Laguna, 38206 La Laguna, Spain email: serroz@iac.es
Johan H. Knapen
Affiliation:
Instituto de Astrofísica de Canarias, Vía Láctea s/n 38205 La Laguna, Spain Departamento de Astrofísica, Universidad de La Laguna, 38206 La Laguna, Spain
Joan Font
Affiliation:
Instituto de Astrofísica de Canarias, Vía Láctea s/n 38205 La Laguna, Spain Departamento de Astrofísica, Universidad de La Laguna, 38206 La Laguna, Spain
John E. Beckman
Affiliation:
Instituto de Astrofísica de Canarias, Vía Láctea s/n 38205 La Laguna, Spain Departamento de Astrofísica, Universidad de La Laguna, 38206 La Laguna, Spain
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Abstract

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We present a study of the kinematics of a sample of isolated spiral galaxies in the Spitzer Survey of Stellar Structure in Galaxies (S4G). We use Hα Fabry-Perot data from the GHαFaS instrument at the William Herschel Telescope (WHT) in La Palma, complemented with images at 3.6 microns, in the R band and in the Hα filter. The resulting data cubes and velocity field maps allow a complete study of the kinematics of a galaxy, including in-depth investigations of the rotation curve, velocity moment maps, velocity residual maps, gradient maps and position-velocity (PV) diagrams. We find clear evidence of the secular evolution processes going on in these galaxies, such as asymmetries in the velocity field in the bar zone, and non-circular motions, probably in response to the potential of the structural components of the galaxies, or to past or present interactions.

Keywords

galaxies: kinematics and dynamicsgalaxies: spiralgalaxies: individuals: NGC 864
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Highlights H16: Highlights of Astronomy , August 2012 , pp. 328
Copyright
Copyright © International Astronomical Union 2015 

References

Erroz-Ferrer, S., Knapen, J. H., et al. 2012, MNRAS, 427, 2938Google Scholar