Performance of photometric template fitting for ultra-high-redshift galaxies

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Volume 697 (May 2025)

A&A, 697 (2025) A160

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Table 4

CEERS z > 5 photometric redshift performance metrics.

`Template`	Δ_bias,z>5	σ_nmad,z>5	η_f,z>5	η_c,z>5	s_z>5
	(%)	(%)	(%)	(%)	(%)
`A22`	−5.5 ± 0.6	${29.0}_{- 0.4}^{+ 0.5}$ $29.0_{-0.4}^{+0.5}$	26.1 ± 0.6	26.6 ± 0.6	99.5 ± 0.1
`BlSFH`	−11.9 ± 0.5	33.0 ± 0.5	27.7 ± 0.7	28.4 ± 0.7	99.3 ± 0.1
`CaSFH`	−16.4 ± 0.5	${34.9}_{- 0.5}^{+ 0.4}$ $34.9_{-0.5}^{+0.4}$	35.8 ± 0.7	36.7 ± 0.7	99.1 ± 0.1
`Ev3`	$- {10.0}_{- 0.6}^{+ 0.5}$ $-10.0_{-0.6}^{+0.5}$	33.6 ± 0.5	${32.0}_{- 0.9}^{+ 1.0}$ $32.0_{-0.9}^{+1.0}$	33.5 ± 0.9	98.5 ± 0.2
`L23`	−7.2 ± 0.7	30.9 ± 0.6	26.3 ± 0.7	27.3 ± 0.7	${98.94}_{- 0.08}^{+ 0.07}$ $98.94_{-0.08}^{+0.07}$
`S23`	−2.2 ± 0.3	22.6 ± 0.5	22.4 ± 0.7	22.4 ± 0.7	${99.996}_{- 0.014}^{+ 0.004}$ $99.996_{-0.014}^{+0.004}$
`T22`	−2.9 ± 0.5	28.2 ± 0.5	24.1 ± 0.7	25.3 ± 0.7	98.8 ± 0.1
`TwSPS`	−30 ± 1	43.4 ± 0.4	46.3 ± 0.8	56 ± 1	90.0 ± 0.6

Notes. Overview of template performance within the z_spec > 5 CEERS sample. Specific metrics are defined above (Sect. 3.1). The CEERS survey has a lower depth, and it can be seen that this requires caution when fitting in the high-redshift regime. In bias, deviation, and catastrophic fit proportion, S23 performs best, perhaps due to being supported by its smaller basis and thus larger constraint.

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