Friday, April 17, 2015

what kills a galaxy?

or maybe a more appropriate title is "how do you know when a galaxy is officially old?"

Anyway, I wrote an article for the conversation with astronomers Tanya Hill and Sarah Brough describing some new research on how galaxies stop forming stars.

Giant galaxies die from the inside when they stop making stars

Galaxy clusters are impressive but do they hinder star formation? NASA, N Benitez (JHU), T Broadhurst (Racah Institute of Physics/The Hebrew University), H Ford (JHU), M Clampin (STScI), G Hartig (STScI), G Illingworth (UCO/Lick Observatory), the ACS Science Team and ESA

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