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- W3212959948 abstract "Many of the baryons in galaxy groups are thought to have been driven out to large distances (≳R500) by feedback, but there are few constraining observations of this extended gas. This work presents the resolved Sunyaev–Zel’dovich (SZ) profiles for a stacked sample of 10 nearby galaxy groups within the mass range . We measured the SZ profiles using the publicly available y-map from the Planck Collaboration as well as our own y-maps constructed from more recent versions of Planck data. The y-map extracted from the latest data release yielded a significant SZ detection out to 3 R500. In addition, the stacked profile from these data was consistent with simulations that included AGN feedback. Our best-fit model using the latest Planck data suggested a baryon fraction ≈5.6% within R500. This is significantly lower than the cosmic value of ≈16%, supporting the idea that baryons have been driven to large radii by AGN feedback. Lastly, we discovered a significant (∼3σ) “bump” feature near ∼2 R500 that is most likely the signature of internal accretion shocks." @default.
- W3212959948 created "2021-11-22" @default.
- W3212959948 creator A5006427505 @default.
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- W3212959948 creator A5053746897 @default.
- W3212959948 date "2021-10-01" @default.
- W3212959948 modified "2023-10-01" @default.
- W3212959948 title "The Resolved Sunyaev–Zel’dovich Profiles of Nearby Galaxy Groups" @default.
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- W3212959948 doi "https://doi.org/10.3847/1538-4357/ac1796" @default.
- W3212959948 hasPublicationYear "2021" @default.
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