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Semantic Scholar Open Access 2025

Euclid Quick Data Release (Q1): Hunting for luminous z>6 galaxies in the Euclid Deep Fields -- forecasts and first bright detections

Euclid Collaboration N. Allen P. Oesch R. Bowler S. Toft J. Matharu +495 lainnya
Lihat Sumber

Abstrak

The evolution of the rest-frame ultraviolet luminosity function (UV LF) is a powerful probe of early star formation and stellar mass build-up. At z>6, its bright end (MUV6 Lyman break galaxies (LBGs) and constrain the UV LF's bright end. With NIR coverage extending to 2um, Euclid can detect galaxies out to z = 13. We present forecasts for the number densities of z>6 galaxies expected in the final EDF dataset. Using synthetic photometry from spectral energy distribution (SED) templates of z = 5--15 galaxies, z = 1--4 interlopers, and Milky Way MLT dwarfs, we explore optimal selection methods for high-z LBGs. A combination of S/N cuts with SED fitting (from optical to MIR) yields the highest-fidelity sample, recovering>76% of input z>6 LBGs while keeping low-z contamination10 sources. Based on empirical double power-law LF models, we expect>100,000 LBGs at z = 6-12 and>100 at z>12 in the final Euclid release. In contrast, steeper Schechter models predict no z>12 detections. We also present two ultra-luminous (MUV9, highlighting Euclid's power to constrain the UV LF's bright end and identify the most luminous early galaxies for follow-up.

Topik & Kata Kunci

Physics

Penulis (500)

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Euclid Collaboration N. Allen

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P. Oesch

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R. Bowler

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Format Sitasi

APA MLA BibTeX
Allen, E.C.N., Oesch, P., Bowler, R., Toft, S., Matharu, J., Weaver, J. et al. (2025). Euclid Quick Data Release (Q1): Hunting for luminous z>6 galaxies in the Euclid Deep Fields -- forecasts and first bright detections. https://www.semanticscholar.org/paper/6078de07ad1698cb732031e2ec2043e5010bb48b

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