Besides gas removal, what structural characteristic of an elliptical galaxy inhibits future star production?
Answer
Its pressure-supported, spheroidal structure is less conducive to cooling gas than a cool disk.
The structure of ellipticals, being spheroidal and dynamically hot (pressure-supported), is intrinsically less conducive to allowing hot halo gas to cool efficiently enough to sustain future star production compared to the thin, cool disk structure of spirals.
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