Cosmology from LOFAR Two-metre Sky Survey Data Release 2: Cross-correlations with luminous red galaxies from eBOSS

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Volume 698 (May 2025)

A&A, 698 (2025) A58

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Table 1.

BAO constraints from the LoTSS–eBOSS cross-correlation and its combination with the eBOSS auto-correlation.

Measurement	z_eff	α	D_A(z_eff)/r_d	χ_min²/dof	Δχ_nw²
Cross (0.6 < z < 0.66)	0.63	1.01 ± 0.11	9.997 ± 1.089	21.20/25	5.02
Cross + auto (0.6 < z < 0.66)	0.63	$0 . 988_{- 0.160}^{+ 0.080}$ $0.988^{+0.080}_{-0.160}$	$9 . 779_{- 1.584}^{+ 0.792}$ $9.779^{+0.792}_{-1.584}$	30.66/50	7.27
Cross (4 bins combined)	0.72	$0 . 968_{- 0.095}^{+ 0.060}$ $0.968^{+0.060}_{-0.095}$	$10 . 122_{- 0.993}^{+ 0.627}$ $10.122^{+0.627}_{-0.993}$	99.72/103	16.28

Notes. The α parameter is converted to angular diameter distance D_A using Eq. (11), with a fiducial cosmology from Planck 2018. χ_min²/dof denotes the reduced chi-squared of our fits. Also, Δχ_nw² compares our results with models lacking BAO features (‘nw’ model; see Eisenstein & Hu 1998).

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