What brief, initial phase might occur immediately following a major merger before the elliptical settles into a 'dead' state?

Answer

A very brief, intense burst of star formation, known as a 'starburst'

While the long-term consequence of a merger is quenching, the immediate interaction can trigger a short-lived, intense phase of rapid star creation before the gas reservoir is depleted or heated.

What brief, initial phase might occur immediately following a major merger before the elliptical settles into a 'dead' state?

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