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The One-Percent survey of the Dark Energy Spectroscopic Instrument collected~ 270k emission line galaxies (ELGs) at 0.8 < z < 1.6. The high completeness ofthe sample allowed the clustering to be measured down to scales never probedbefore, 0.04 Mpc/h in rp for the projected 2-point correlation function (2PCF)and 0.17 Mpc/h in galaxy pair separation s for the 2PCF monopole andquadrupole. The most striking feature of the measurements is a strong signal atthe smallest scales, below 0.2 Mpc/h in rp and 1 Mpc/h in s. We analyze thesedata in the halo occupation distribution framework. We consider differentdistributions for central galaxies, a standard power law for satellites with nocondition on the presence of a central galaxy and explore several extensions ofthese models. For all considered models, the mean halo mass of the sample isfound to be log10 <Mh> ~ 11.9. We obtain a satellite mean occupation functionwhich agrees with physically motivated ELG models only if we introducecentral-satellite conformity, meaning that the satellite occupation isconditioned by the presence of central galaxies of the same type. To achieve inaddition a good modeling of the clustering between 0.1 and 1 Mpc/h in rp, weallow for ELG positioning outside of the halo virial radius and find 0.5% ofELGs residing in the outskirts of halos. Furthermore, the satellite velocitydispersion inside halos is found to be ~ 30% larger than that of the halo darkmatter particles. These are the main findings of our work. We investigateassembly bias as a function of halo concentration, local density or localdensity anisotropies and observe no significant change in our results. We splitthe data sample in two redshift bins and report no significant evolution withredshift. Lastly, changing the cosmology in the modeling impacts only slightlyour results.

The DESI One-Percent survey: exploring the Halo Occupation Distribution of Emission Line Galaxies with AbacusSummit simulations