Hostname: page-component-78c5997874-mlc7c Total loading time: 0 Render date: 2024-11-10T17:02:57.206Z Has data issue: false hasContentIssue false
  • English
  • Français

Lopsidedness and sloshing in centres of advanced mergers of galaxies

Published online by Cambridge University Press:  01 July 2007

Chanda J. Jog  and
Aparna Maybhate
Chanda J. Jog
Affiliation:
Department of Physics, Indian Institute of Science, Bangalore 560012, India
Aparna Maybhate
Affiliation:
Space Telescope Science Institute, Baltimore, MD 21218, U.S.A. email: cjjog@physics.iisc.ernet.in, maybhate@stsci.edu
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We measure the non-axisymmetry in the luminosity distribution in the central few kpc of a sample of advanced mergers of galaxies, by analyzing their 2MASS images. All mergers show a high central asymmetry: the centres of isophotes show a striking sloshing pattern with a spatial variation of upto 30% within the central 1 kpc; and the Fourier amplitude for lopsidedness (m = 1) shows high values upto 0.2 within the central 5 kpc. The central asymmetry is estimated to be long-lived, lasting for ~ a few Gyr or ~ 100 local dynamical timescales. This will significantly affect the dynamical evolution of this region, by helping fuel the central active galactic nucleus, and also by causing the secular growth of the bulge driven by lopsidedness.

Keywords

galaxies: evolution - galaxies: kinematics and dynamics - galaxies: interactions
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S245: Formation and Evolution of Galaxy Bulges , July 2007 , pp. 79 - 80
Copyright
Copyright © International Astronomical Union 2008

References

Barnes, J. 1992, ApJ 393, 484CrossRefGoogle Scholar
Bournaud, F., Combes, F., & Jog, C. J. 2004, A & A, 418, L27CrossRefGoogle Scholar
Chitre, A. & Jog, C. J. 2002, A & A 388, 407CrossRefGoogle Scholar
Jog, C. J. & Maybhate, A. 2006, MNRAS 370, 891CrossRefGoogle Scholar