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- W3124604246 endingPage "2018" @default.
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- W3124604246 abstract "We present the first results of a narrow-band photometric study of the massive galaxy cluster XMMU J2235.3−2557 at z= 1.39. We obtained deep H narrow-band imaging with the Near InfraRed Imager and Spectrometer on Gemini North, corresponding to Hα emission at the cluster's redshift. Our sample consists of 82 galaxies within a radius of ∼500 kpc, 10 of which are spectroscopically confirmed cluster members. 16 galaxies are identified as excess line-emitters. Among just the excess line-emitting galaxies, we find an average star formation rate (SFR) of 3.6 ± 1.3 M⊙ yr−1. For spectroscopically confirmed cluster members, we find a correlation between H broad-band magnitude and SFR such that brighter galaxies have lower SFRs. The probability that the SFR and magnitude of confirmed members are uncorrelated is 0.7 per cent. We also find a correlation between the SFR and distance from the cluster centre for both confirmed and excess line-emitting candidate members, with a probability of 5 per cent for there to be no correlation among confirmed members. All excess line-emitting candidate cluster members are located outside a radius of 200 kpc. We conclude that star formation is effectively shut off within the central 200 kpc radius (RQUENCH∼ 200 kpc) of this massive galaxy cluster at z= 1.39, when the Universe was only 4.5 Gyr old." @default.
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- W3124604246 date "2010-12-30" @default.
- W3124604246 modified "2023-09-25" @default.
- W3124604246 title "Star formation in the XMMU J2235.3−2557 galaxy cluster at z= 1.39" @default.
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- W3124604246 doi "https://doi.org/10.1111/j.1365-2966.2010.17828.x" @default.
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