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Revealing the Environmental Dependence of Molecular Gas Content in a Distant X-Ray Cluster at z = 2.51

  • Authors: Tao Wang, David Elbaz, Emanuele Daddi, Daizhong Liu, Tadayuki Kodama, Ichi Tanaka, Corentin Schreiber, Anita Zanella, Francesco Valentino, Mark Sargent, Kotaro Kohno, Mengyuan Xiao, Maurilio Pannella, Laure Ciesla, Raphael Gobat, and Yusei Koyama

2018 The Astrophysical Journal Letters 867 L29.

  • Provider: AAS Journals

Caption: Figure 2.

Left panel: IR luminosities, LIR, vs. CO(1-0) line luminosities, ﹩{L}_{\mathrm{CO}(1-0)}^{{\prime} }﹩, for CO(1-0) detected galaxies in CLJ1001. The solid and dashed lines represent the scaling relation for field MS and strong SB galaxies (ΔMS ∼ 10), respectively (Sargent et al. 2014). The field galaxy sample includes both MS and SB galaxies drawn from the compilation by Sargent et al. (2014), and a sample of z ∼ 1 SB galaxies by Silverman et al. (2015). We also include a few recent studies of cluster galaxies at z ≳ 1.5, which have either CO(2–1) (Stach et al. 2017; Noble et al. 2017) or CO(1-0) (Rudnick et al. 2017) measurements. Right panel: SFE, as indicated by the ratio between LIR and ﹩{L}_{\mathrm{CO}(1-0)}^{{\prime} }﹩, vs. ΔMS for galaxies in CLJ1001. The best-fit relation for field galaxies and its associated 1σ scatter are also shown (Magdis et al. 2012). A large variety of SFE for cluster galaxies is observed.

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