为什么这个椭圆星系现在有旋臂?

https://decaps.legacysurvey.org//viewer/?ra=186.9672&dec=12.2960&layer=ls-dr9&zoom=13.371786303490799

我只认为它们是椭圆螺旋星系和不规则星系三种类型。 但螺旋星系通常不是金色的

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Looks like that it formed from Ram Pressure Stripping or something else. Usually these are not an attraction to behold, but do have the same characteristics as elliptical galaxies.

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EDIT: Do they dub them “anemic spirals”?

I think so