Bibcode
DOI
Aguerri, J. A. L.; Beckman, J. E.; Prieto, M.
Bibliographical reference
The Astronomical Journal, Volume 116, Issue 5, pp. 2136-2153.
Advertised on:
11
1998
Citations
78
Refereed citations
71
Description
We have used photometric images of 10 barred galaxies in the B and I
bands to infer geometric and dynamical parameters of their bars: their
lengths, their strengths, and their corotation radii. The bar length,
R_bar, is measured as the radius at which the odd Fourier components of
the I image show a rise, accompanied by a blue peak in the B-I radial
profile. The bar strength, S_bar, is defined as the integral of the
amplitude ratio of the m = 2 component to the m = 0 component, over the
radial range to the end of the bar. The corotation radius, R_CR, is
determined as the first crossing point of the loci of the phase curves
defining the radial dependence of the azimuthal maxima for the B and I
images. With these definitions, we find that R_CR is in all cases
slightly larger than R_bar, with a mean value close to 1.2R_bar. We find
a weak dependence of the ratio R_CR/R_bar on morphological type, and a
better correlated, though also shallow, dependence of this parameter on
S_bar.