The Gravitational Torque of Bars

I. Puerari, D.L. Block, J. Knapen, B. Elmegreen, R.J. Buta, S. Stedman, D.M. Elmegreen

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    Abstract

    We have determined the gravitational torque of a sample of 45 galaxies observed at K band with the 4.2m William Herschel Telescope. The results of this sample, combined with those for a sample of 30 galaxies previously analysed (Buta & Block 2001), show that the gravitational bar torque correlates only weakly with the optical bar type listed in the Revised Shapley-Ames and de Vaucouleurs systems. In fact, Some classically unbarred galaxies have larger bar torques than classically barred galaxies. The Hubble classification scheme poorly recognizes the gravitational influences of the bar perturbation in the force field.
    Original languageEnglish
    Title of host publicationIn: Procs of Disks of Galaxies: Kinematics, Dynamics and Peturbations - ASP Conference Series 275
    PublisherAstronomical Society of the Pacific
    Pages193-196
    ISBN (Print)1-58381-117-6
    Publication statusPublished - 2002

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