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- W3100463282 endingPage "153" @default.
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- W3100463282 abstract "The ZFIRE survey has spectroscopically confirmed two proto-clusters using the MOSFIRE instrument on Keck 1: one at z=2.095 in COSMOS and another at z=1.62 in UDS. Here we use an updated ZFIRE dataset to derive the properties of ionized gas regions of proto-cluster galaxies by extracting fluxes from emission lines H$beta$ 4861AA, [OIII] 5007AA, H$alpha$ 6563AA, [NII] 6585AA, and [SII] 6716,6731AA. We measure gas-phase metallicity of members in both proto-clusters using two indicators, including a strong-line indicator relatively independent of ionization parameter and electron density. Proto-cluster and field galaxies in both UDS and COSMOS lie on the same Mass-Metallicity Relation with both metallicity indicators. We compare our results to recent IllustrisTNG results, which reports no significant gas-phase metallicity offset between proto-cluster and field galaxies until z=1.5. This is in agreement with our observed metallicities, where no offset is measured between proto-cluster and field populations. We measure tentative evidence from stacked spectra that UDS high mass proto-cluster and field galaxies have differing [OIII]/H$beta$ ratios, however these results are dependent on the sample size of the high mass stacks." @default.
- W3100463282 created "2020-11-23" @default.
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- W3100463282 creator A5051609366 @default.
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- W3100463282 date "2019-09-30" @default.
- W3100463282 modified "2023-09-23" @default.
- W3100463282 title "A Tale of Two Clusters: An Analysis of Gas-phase Metallicity and Nebular Gas Conditions in Proto-cluster Galaxies at <i>z</i> ∼ 2" @default.
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