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- Publications
- Influence
Constraints from Dynamical Friction on the Dark Matter Content of Barred Galaxies
- V. Debattista, J. Sellwood
- Physics
- 20 June 2000
We show that bars in galaxy models having halos of moderate density and a variety of velocity distributions all experience a strong drag from dynamical friction unless the halo has large angular… Expand
The Properties of the Galactic Bar Implied by Gas Kinematics in the Inner Milky Way
- B. Weiner, J. Sellwood
- Physics
- 11 April 1999
Longitude-velocity (l-V) diagrams of H I and CO gas in the inner Milky Way have long been known to be inconsistent with circular motion in an axisymmetric potential. Several lines of evidence suggest… Expand
Spiral instabilities provoked by accretion and star formation
- J. Sellwood, R. Carlberg
- Physics
- 1 July 1984
Dynamics of Barred Galaxies
- J. Sellwood, A. Wilkinson
- Physics
- 1 February 1993
Some 30% of disc galaxies have a pronounced central bar features in the disc plane and many more have weaker features of a similar kind. Kinematic data indicate that the bar constitutes a major… Expand
Modeling Noncircular Motions in Disk Galaxies: Application to NGC 2976
- K. Spekkens, J. Sellwood
- Physics
- 27 March 2007
We present a new procedure to fit nonaxisymmetric flow patterns to two-dimensional velocity maps of spiral galaxies. We concentrate on flows caused by barlike or oval distortions to the total… Expand
A dynamical instability of bars in disk galaxies
- N. Raha, J. Sellwood, R. James, F. Kahn
- Physics
- Nature
- 1 August 1991
STRONG, rapidly rotating, persistent bars readily form in numerical simulations of initially axisymmetric disk galaxies1–4. The global dynamical instability responsible for this behaviour is a great… Expand
Transient Spirals as Superposed Instabilities
- J. Sellwood, R. Carlberg
- Physics
- 5 March 2014
We present evidence that recurrent spiral activity, long manifested in simulations of disk galaxies, results from the superposition of a few transient spiral modes. Each mode lasts between 5 and 10… Expand
LAMOST Experiment for Galactic Understanding and Exploration (LEGUE) — The survey’s science plan
- Licai Deng, H. Newberg, +22 authors Z. Zhu
- Physics
- 15 June 2012
We describe the current plans for a spectroscopic survey of millions of stars in the Milky Way galaxy using the Guo Shou Jing Telescope (GSJT, formerly called the Large sky Area Multi-Object fiber… Expand
DYNAMICAL FRICTION AND THE DISTRIBUTION OF DARK MATTER IN BARRED GALAXIES
- V. Debattista, J. Sellwood
- Physics
- 3 October 1997
We use fully self-consistent N-body simulations of barred galaxies to show that dynamical friction from a dense dark matter halo dramatically slows the rotation rate of bars. Our result supports… Expand
Bi-symmetric instabilities of the Kuz'min/Toomre disc
- E. Athanassoula, J. Sellwood
- Physics
- 1 July 1986
Etude numerique de l'influence d'un mouvement aleatoire sur les modes insrables de formation des barres d'un type de modeles de disques stellaires. On montre que le taux de croissance des barres est… Expand