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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 8.

This figure set contains example plots of the recovered SFHs from dense basis of log (M _⋆/M _⊙) > 10 and z > 4 galaxies. The blue (orange, red) panels show the time at which the galaxy formed 25% (50%, 75%) of the observed stellar mass. The starting time is defined as the start of the Universe. The black line shows the best-fitting SFH, and the thinner blue lines show other draws for the SFH; the opacity scales with the χ ² of each fit, where darker represent a lower χ ² (better fit). The bottom two panels show the added constraints that including MIRI observations provide. The SFHs of high-z massive galaxies are varied, and in certain cases, difficult to tightly constrain when determined from photometry alone.

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