Existence of a Planck18 SHAM that simultaneously fits n and w_p

Determine whether a subhalo abundance matching model within Planck18 cosmology exists that simultaneously fits both the PAC-measured excess surface density n and the projected two-point correlation function w_p across the relevant stellar-mass bins, or else identify the specific modifications required to achieve simultaneous agreement.

Background

The authors find a ≈15% internal tension between the galaxy stellar mass function implied by PAC-based n and the clustering w_p when modeling within Planck18 cosmology. Tests with maximal galaxy assembly bias and modest cosmological shifts (e.g., to WMAP9-like parameters) reduce but do not eliminate the discrepancy.

Their analysis concludes that, under Planck18, their SHAM framework cannot simultaneously match both n and w_p, motivating an explicit question about the existence of a joint fit and what changes (e.g., cosmology, effective redshift determination, or other modeling ingredients) would be necessary.