Bulge properties and dark matter content of early-type barred galaxies

Abstract

The dynamics of a barred galaxy depends on the pattern speed of its bar. The only direct method for measuring the pattern speed of a bar is the Tremaine-Weinberg technique. This method is best suited to the analysis of the distribution and dynamics of the stellar component. Therefore it has been mostly used for early-type barred galaxies. Most of them host a classical bulge. On the other hand, a variety of indirect methods, which are based on the analysis of the distribution and dynamics of the gaseous component, has been used to measure the bar pattern speed in late-type barred galaxies. Nearly all the measured bars are as rapidly rotating as they can be. By comparing this result with high-resolution numerical simulations of bars in dark matter halos, it is possible to conclude that these bars reside in maximal disks.

arXiv comment4 pages. To appear in the proceedings of IAU Symposium 245 "Formation and Evolution of Galaxy Bulges", M. Bureau, E. Athanassoula, and B. Barbuy, eds

References in corpus (25)

• What determines the strength and the slowdown rate of bars ?
• Constraints from Dynamical Friction on the Dark Matter Content of Barred Galaxies
• Early Evolution of Disk Galaxies : Formation of Bulges in Clumpy Young Galactic Disks
• Dynamical Friction and the Distribution of Dark Matter in Barred Galaxies
• Characterizing Bars at z~0 in the optical and NIR: Implications for the Evolution of Barred Disks with Redshift
• Secular bar formation in galaxies with significant amount of dark matter
• Measurement of fast bars in a sample of early-type barred galaxies
• The pattern speed of the bar in NGC 936
• A Fast Bar in the Post-Interaction Galaxy NGC 1023
• Detailed comparison of the structures and kinematics of simulated and observed barred galaxies
• Gas and stellar dynamics in NGC 1068. Probing the galactic gravitational potential
• Direct Confirmation of Two Pattern Speeds in the Double Barred Galaxy NGC 2950
• The Shape and Figure Rotation of NGC 2915's Dark Halo
• The Pattern Speeds of M51, M83 and NGC 6946 Using CO and the Tremaine-Weinberg Method
• The Tully-Fisher Relation of Barred Galaxies
• Fabry-Perot Absorption-Line Spectroscopy of NGC 7079: Kinematics and Bar Pattern Speed
• The Lifetime of Grand Design
• Pattern Speeds of BIMA-SONG Galaxies with Molecule-Dominated ISMs Using the Tremaine-Weinberg Method
• On the relevance of the Tremaine-Weinberg method applied to H-alpha velocity field.Pattern speeds determination in M100 (NGC 4321)
• Bar-Halo Friction in Galaxies II: Metastability
• Model-independent measurements of bar pattern speeds
• The bar pattern speed of NGC 4431
• Response of the integrals in the Tremaine-Weinberg method to multiple pattern speeds: a counter-rotating inner bar in NGC 2950?
• The effect of dust on Tremaine-Weinberg measurements
• The Kinematically Measured Pattern Speeds of NGC 2523 and NGC 4245