Back to Volume
Paper: Dynamical Influence of Bars on the Star Formation in Isolated Galaxies
Volume: 396, Formation and Evolution of Galaxy Disks
Page: 377
Authors: Verley, S.; Combes, F.; Verdes-Montenegro, L.; Bergond, G.; Leon, S.
Abstract: Star formation depends strongly on both the local environment of galaxies and the internal dynamics of the interstellar medium. To disentangle the two effects, we obtained, in the framework of the AMIGA project (Verdes-Montenegro et al. 2005; Sulentic et al. 2006; Lisenfeld et al. 2007; Verlay et al. 2007a,b,c), Hα and Gunn r photometric data for more than 200 spiral galaxies lying in very low-density regions of the local Universe. We characterize the Hα emission, tracing current star formation, of the 45 largest and least inclined galaxies observed for which we estimate the torques between the gas and the bulk of the optical matter. We subsequently study the Hα morphological aspect of these isolated spiral galaxies. Using Fourier analysis, we focus on the modes of the spiral arms and also on the strength of the bars, computing the torques between the gas and newly formed stars (Hα), and the bulk of the optical matter (Gunn r).
Back to Volume