The Gravitational Torque of Bars

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

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 language	English
Title of host publication	In: Procs of Disks of Galaxies: Kinematics, Dynamics and Peturbations - ASP Conference Series 275
Publisher	Astronomical Society of the Pacific
Pages	193-196
ISBN (Print)	1-58381-117-6
Publication status	Published - 2002

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@inproceedings{57f3663ad47f49afbc52aff083b631aa,

title = "The Gravitational Torque of Bars",

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.",

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

note = "Original paper can be found at: http://www.astrosociety.org/pubs/cs/253.html--Copyright Astronomical Society of the Pacific",

year = "2002",

language = "English",

isbn = "1-58381-117-6",

pages = "193--196",

booktitle = "In: Procs of Disks of Galaxies: Kinematics, Dynamics and Peturbations - ASP Conference Series 275",

publisher = "Astronomical Society of the Pacific",

address = "United States",

}

TY - GEN

T1 - The Gravitational Torque of Bars

AU - Puerari, I.

AU - Block, D.L.

AU - Knapen, J.

AU - Elmegreen, B.

AU - Buta, R.J.

AU - Stedman, S.

AU - Elmegreen, D.M.

N1 - Original paper can be found at: http://www.astrosociety.org/pubs/cs/253.html--Copyright Astronomical Society of the Pacific

PY - 2002

Y1 - 2002

N2 - 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.

AB - 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.

M3 - Conference contribution

SN - 1-58381-117-6

SP - 193

EP - 196

BT - In: Procs of Disks of Galaxies: Kinematics, Dynamics and Peturbations - ASP Conference Series 275

PB - Astronomical Society of the Pacific

ER -

The Gravitational Torque of Bars

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