SIMBAD references

1998AJ....116.2136A - Astron. J., 116, 2136-2153 (1998/November-0)

Bar strengths, bar lengths, and corotation radii, derived photometrically for 10 barred galaxies.

AGUERRI J.A.L., BECKMAN J.E. and PRIETO M.

Abstract (from CDS):

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, Rbar, 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, Sbar, 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, RCR, 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 RCR is in all cases slightly larger than Rbar, with a mean value close to 1.2Rbar. We find a weak dependence of the ratio RCR/Rbar on morphological type, and a better correlated, though also shallow, dependence of this parameter on Sbar.

Abstract Copyright:

Journal keyword(s): Galaxies: Kinematics and Dynamics - Galaxies: Photometry

Simbad objects: 10

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