Ram pressure stripping from a substance within these systems gives certain objects a distinctive “jellyfish” appearance. For 10 points each:
[10h] Name these systems. Scattering by electrons in these systems causes anisotropies (“an-eye-SAW-truh-peez”) in the CMB in the Sunyaev–Zeldovich effect.
ANSWER: galaxy clusters [accept galaxy groups; accept superclusters; prompt on clusters; reject “galaxies”]
[10m] The tails of jellyfish galaxies are notable for their high luminosity caused by this process. Post-merger galaxies usually experience a “burst” of this process, which occurs after exceeding the Jeans mass. A description is acceptable.
ANSWER: star formation [or stellar formation; accept equivalents like stars being created; prompt on starburst; prompt on gravitational collapse by asking “what other process does that lead to?”]
[10e] The intracluster medium, which strips material away from jellyfish galaxies, primarily consists of superheated plasma that emits radiation in this region of the EM spectrum. This region is the second-highest frequency band after gamma rays.
ANSWER: X-rays
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