What causes a galactic bar to eventually dissolve or fade away?
Answer
An excessive concentration of mass in the central region
Bars are not necessarily permanent structures. Their existence is maintained by specific orbital resonances. If the bar successfully funnels too much gas and stellar material into the galactic center, the resulting mass concentration becomes too high. This dense core disrupts the delicate orbital resonances that keep the bar stable, causing the structure to weaken and eventually dissolve.
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