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Tracing recent star formation of red early-type galaxies out to z ~ 1

Tracing recent star formation of red early-type galaxies out to z ~ 1. 42. Mid-IR excess of red ETGs as a good indicator of recent SF Even very massive red ETGs with M star > 10 11.2 M ⊙ , more than 18% of them show excess emission

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Tracing recent star formation of red early-type galaxies out to z ~ 1

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  1. Tracing recent star formation of red early-type galaxies out to z ~ 1 42 • Mid-IR excess of • red ETGs as a good • indicator ofrecent SF • Even very massive red ETGs with Mstar > 1011.2M⊙, • more than 18% of them show excess emission • Recent SF is not rare among massive red ETGs at z < 1

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