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Evidence for a Shallow Evolution in the Volume Densities of Massive Galaxies at z = 4–8 from CEERS

  • Authors: Katherine Chworowsky, Steven L. Finkelstein, Michael Boylan-Kolchin, Elizabeth J. McGrath, Kartheik G. Iyer, Casey Papovich, Mark Dickinson, Anthony J. Taylor, L. Y. Aaron Yung, Pablo Arrabal Haro, Micaela B. Bagley, Bren E. Backhaus, Rachana Bhatawdekar, Yingjie Cheng, Nikko J. Cleri, Justin W. Cole, M. C. Cooper, Luca Costantin, Avishai Dekel, Maximilien Franco, Seiji Fujimoto, Christopher C. Hayward, Benne W. Holwerda, Marc Huertas-Company, Michaela Hirschmann, Taylor A. Hutchison, Anton M. Koekemoer, Rebecca L. Larson, Zhaozhou Li, Arianna S. Long, Ray A. Lucas, Nor Pirzkal, Giulia Rodighiero, Rachel S. Somerville, Brittany N. Vanderhoof, Alexander de la Vega, Stephen M. Wilkins, Guang Yang, Jorge A. Zavala

Katherine Chworowsky et al 2024 The Astronomical Journal 168 .

  • Provider: AAS Journals

Caption: Figure 9.

Comparison of the number density of ﹩{\mathrm{log}}_{10}({M}_{\star }/{M}_{\odot })\gt 10.﹩ galaxies found in CEERS vs. models. Here we show the sampled number densities with EROs removed (details in Section 3.5), the gray shaded region in our 95% CI. We note that at lower redshifts (z < 4), the models seem to agree well; however, they diverge at higher redshifts. Overall, we find good agreement with DRAGONS, MTNG, and SC-SAM at z < 4.5. At z > 5 we find a higher median number density than predicted by all models shown aside from FFB, where our results are best fit by the FFB predictions with ﹩{\epsilon }_{\max }=0.3﹩ at z > 6.

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