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Testing a theoretical prediction for bar formation in galaxies with bulges

Kataria, SK and Das, M and Barway, S (2020) Testing a theoretical prediction for bar formation in galaxies with bulges. In: Astronomy and Astrophysics, 640 .

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Official URL: https://dx.doi.org/10.1051/0004-6361/202037527


Earlier studies have shown that massive bulges impede bar formation in disk galaxies. Recent N-body simulations have derived a bar formation criterion that depends on the radial bulge force in a galaxy disk. We use those simulations to show that bars can form only when the force constant FB < 0.13, where FB depends on the ratio of the bulge force to the total force of the galaxy at twice the disk scale length 2Rd. In this article, we test this theoretical prediction using observational data obtained from the literature. Our sample consists of 63 barred galaxies with a wide range of Hubble classes taken from the S 4 G catalog; for the galaxies that we include, bulge, disk, and bar decomposition has been carried out. We find that 92 of our sample galaxies satisfy the condition FB < 0.13 for bar formation in galaxies and hence agree with the bar formation criterion given by the simulations.

Item Type: Journal Article
Publication: Astronomy and Astrophysics
Publisher: EDP Sciences
Additional Information: The copyright of this article belongs to EDP Sciences
Keywords: Astronomy; Astrophysics, Disk galaxies; Force constants; N-body simulation; Observational data; Scale length; Total force, Galaxies
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 25 Aug 2020 07:22
Last Modified: 25 Aug 2020 07:22
URI: http://eprints.iisc.ac.in/id/eprint/66362

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