Lopsidedness and sloshing in centres of advanced mergers of galaxies

Jog, Chanda J. ; Maybhate, Aparna (2007) Lopsidedness and sloshing in centres of advanced mergers of galaxies Proceedings of the International Astronomical Union, 3 . pp. 79-80. ISSN 1743-9213

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Related URL: http://dx.doi.org/10.1017/S1743921308017341


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.

Item Type:Article
Source:Copyright of this article belongs to Cambridge University Press.
Keywords:Galaxies: Evolution; Galaxies: Kinematics and Dynamics; Galaxies: Interactions
ID Code:14255
Deposited On:12 Nov 2010 08:43
Last Modified:16 May 2016 23:15

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