The DESI One-Percent Survey: Modelling the clustering and halo occupation of all four DESI tracers with UCHUU

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Table 4.

HOD parameters and bias factors of the BGS parent and volume-limited samples.

$M_{r}^{th}$ $M_r^\mathrm {th}$	z_max	N_eff	V_eff	$log n_{g}^{BGS}$ $\log n_{\mathrm {g}}^{\mathrm {BGS}}$	$log n_{g}^{Uchuu}$ $\log n_{\mathrm {g}}^{\mathrm {Uchuu}}$	log M_min	σ_{log M}	log M₀	$log M_{1}^{'}$ $\log {M^{\prime }_{1}}$	α	$f_{sat}^{HOD}$ $f_{\mathrm {sat}}^{\mathrm {HOD}}$	$f_{sat}^{Uchuu}$ $f_{\mathrm {sat}}^{\mathrm {Uchuu}}$	b^BGS	b^Uchuu
r<19.5	0.3	101 909	10.48	–1.99	–1.86 ± 0.01	11.88	0.51	11.65	13.02	1.04	0.226	0.223	1.04 ± 0.05	1.110 ± 0.005

–18.0	0.10	12 159	0.42	–1.52	–1.54 ± 0.04	11.31	0.28	11.49	12.59	0.99	0.267	0.26	0.76 ± 0.19	1.027 ± 0.018
–18.5	0.12	16 764	0.76	–1.66	–1.66 ± 0.03	11.44	0.30	11.59	12.69	1.00	0.259	0.25	0.81 ± 0.17	1.065 ± 0.016
–19.0	0.15	24 089	1.49	–1.73	–1.80 ± 0.03	11.59	0.33	11.69	12.82	1.00	0.251	0.246	1.02 ± 0.12	1.110 ± 0.012
–19.5	0.20	38 522	3.46	–1.92	–1.97 ± 0.02	11.76	0.35	11.79	12.96	1.01	0.239	0.237	0.98 ± 0.09	1.144 ± 0.009
–20.0	0.25	44 867	6.45	–2.14	–2.18 ± 0.02	11.99	0.39	11.96	13.14	1.01	0.225	0.225	1.17 ± 0.07	1.206 ± 0.007
–20.5	0.30	39 591	10.37	–2.38	–2.46 ± 0.02	12.30	0.46	12.10	13.39	1.02	0.204	0.209	1.20 ± 0.06	1.289 ± 0.006
–21.0	0.35	25 511	14.29	–2.74	–2.83 ± 0.02	12.73	0.57	12.21	13.73	1.02	0.179	0.188	1.33 ± 0.10	1.414 ± 0.010
–21.5	0.425	13 184	16.78	–3.21	–3.36 ± 0.01	13.31	0.73	11.95	14.15	0.97	0.151	0.160	1.51 ± 0.10	1.638 ± 0.010
–22.0	0.50	3600	5.82	–3.79	–4.14 ± 0.02	14.05	0.86	–	14.73	0.86	0.111	0.128	1.81 ± 0.16	2.003 ± 0.016

Notes. The first two columns show the absolute magnitude threshold and the maximum redshift used to define the volume-limited samples. All volume-limited samples have a minimum redshift z_min = 0.05, while for the r<19.5 sample, the redshift range is 0.1<z<0.3. The following columns give for each sample the number of galaxies, the effective volume (in 10⁶ h⁻³ Mpc³), log₁₀ of the galaxy number density (in h³ Mpc⁻³), the 5 parameters of the HOD model fit to its mean halo occupancy, displayed in the left panel of Figure 13. Halo masses are in units of h⁻¹ M_⊙. $f_{sat}^{HOD}$ $f_\mathrm {sat}^\mathrm {HOD}$ is the satellite fraction calculated using the best-fitting 5 parameter HOD, while $f_{sat}^{Uchuu}$ $f_\mathrm {sat}^\mathrm {Uchuu}$ is the satellite fraction measured directly from the UCHUU BGS mock. The last two columns provide the bias factors at the median redshift of each sample measured from the UCHUU-BGS lightcones and One-Percent data, as shown in Figure 16.

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