The slope and scatter of the star-forming main sequence at z ∼ 5: Reconciling observations with simulations

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Volume 707 (March 2026)

A&A, 707 (2026) A129

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Table 1.

Median Hα-based SFRs in stellar mass bins in the ALT sample at z = 3.7 − 5.1.

log(M_★/M_⊙)	log(SFR/M_⊙ yr⁻¹)	Mass completeness
$6 . 8_{- 0.3}^{+ 0.2}$ $Mathematical equation: $ 6.8 ^{+0.2}_{-0.3} $$	$- 0 . 31_{- 0.21}^{+ 0.20}$ $Mathematical equation: $ -0.31^{+0.20}_{-0.21} $$	5%
$7 . 3_{- 0.3}^{+ 0.3}$ $Mathematical equation: $ 7.3 ^{+0.3}_{-0.3} $$	$- 0 . 13_{- 0.22}^{+ 0.21}$ $Mathematical equation: $ -0.13^{+0.21}_{-0.22} $$	28%
$7 . 9_{- 0.3}^{+ 0.3}$ $Mathematical equation: $ 7.9 ^{+0.3}_{-0.3} $$	$0 . 04_{- 0.29}^{+ 0.36}$ $Mathematical equation: $ 0.04^{+0.36}_{-0.29} $$	70%
$8 . 5_{- 0.3}^{+ 0.3}$ $Mathematical equation: $ 8.5 ^{+0.3}_{-0.3} $$	$0 . 26_{- 0.38}^{+ 0.43}$ $Mathematical equation: $ 0.26^{+0.43}_{-0.38} $$	90%
$9 . 0_{- 0.3}^{+ 0.4}$ $Mathematical equation: $ 9.0 ^{+0.4}_{-0.3} $$	$0 . 66_{- 0.36}^{+ 0.35}$ $Mathematical equation: $ 0.66^{+0.35}_{-0.36} $$	98%
$9 . 6_{- 0.3}^{+ 0.4}$ $Mathematical equation: $ 9.6 ^{+0.4}_{-0.3} $$	$1 . 09_{- 0.52}^{+ 0.45}$ $Mathematical equation: $ 1.09^{+0.45}_{-0.52} $$	100%

Notes. We list the median values in each bin, and the errors correspond to the 16th and 84th percentiles, respectively. We also list the median mass completeness of our SFR-selected sample in each mass bin, estimated as described in Appendix A.

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