The rise of the galactic empire: luminosity functions at $z\sim17$ and $z\sim25$ estimated with the MIDIS$+$NGDEEP ultra-deep JWST/NIRCam dataset

Pablo G. Pérez-González; Göran Östlin; Luca Costantin; Jens Melinder; Steven L. Finkelstein; Rachel S. Somerville; Marianna Annunziatella; Javier Álvarez-Márquez; Luis Colina; Avishai Dekel; Mark Dickinson; Henry C. Ferguson; Zhaozhou Li; L. Y. Aaron Yung; Mic B. Bagley; Leindert A. Boogaard; Denis Burgarella; Antonello Calabrò; Karina I. Caputi; Yingjie Cheng; Andreas Eckart; Mauro Giavalisco; Steven Gillman; Thomas R. Greve; Mahmoud Hamed; Nimish P. Hathi; Jens Hjorth; Marc Huertas-Company; Jeyhan Kartaltepe; Anton M. Koekemoer; Vasily Kokorev; Álvaro Labiano; Danial Langeroodi; Gene C. K. Leung; Priyamvada Natarajan; Casey Papovich; Florian Peissker; Laura Pentericci; Nor Pirzkal; Pierluigi Rinaldi; Paul van der Werf; Fabian Walter

arXiv · 2503.15594

The rise of the galactic empire: luminosity functions at $z\sim17$ and $z\sim25$ estimated with the MIDIS$+$NGDEEP ultra-deep JWST/NIRCam dataset

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Abstract

We present a sample of six F200W and three F277W dropout sources identified as $16 16$ candidates present mass-weighted ages around 30 Myr, and attenuations $\mathrm{A(V)}<0.1$ mag. Their average stellar mass is $\mathrm{M}_\bigstar\sim10^{7}\,\mathrm{M}_\odot$, implying a stellar-to-baryon mass fraction around 10% if the emissivity increases with redshift, or significantly higher otherwise. Three candidates present very blue UV spectral slopes ($\beta\sim-3$) compatible with Pop III young ($\lesssim10$ Myr) stars and/or high escape fractions of ionizing photons; the rest have $\beta\sim-2.5$ similar to $z=10-12$ samples.

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Pablo G. Pérez-González, Göran Östlin, Luca Costantin, Jens Melinder, Steven L. Finkelstein, Rachel S. Somerville, Marianna Annunziatella, Javier Álvarez-Márquez, Luis Colina, Avishai Dekel, Mark Dickinson, Henry C. Ferguson, Zhaozhou Li, L. Y. Aaron Yung, Mic B. Bagley, Leindert A. Boogaard, Denis Burgarella, Antonello Calabrò, Karina I. Caputi, Yingjie Cheng, Andreas Eckart, Mauro Giavalisco, Steven Gillman, Thomas R. Greve, Mahmoud Hamed, Nimish P. Hathi, Jens Hjorth, Marc Huertas-Company, Jeyhan Kartaltepe, Anton M. Koekemoer, Vasily Kokorev, Álvaro Labiano, Danial Langeroodi, Gene C. K. Leung, Priyamvada Natarajan, Casey Papovich, Florian Peissker, Laura Pentericci, Nor Pirzkal, Pierluigi Rinaldi, Paul van der Werf, Fabian Walter. 2025-03-19. The rise of the galactic empire: luminosity functions at $z\sim17$ and $z\sim25$ estimated with the MIDIS$+$NGDEEP ultra-deep JWST/NIRCam dataset. https://arxiv.org/abs/2503.15594

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