Neutrino fluxes and central metallicity of the models with different planet formation scenarios. The color of the filled circles (model M2var) corresponds to the M₂ value (see panel (d)), which is the protosolar mass when the accretion metallicity decreases. The dotted line in panel (e) shows the relation in Gough (2019), and the dashed lines in panels (d) and (e) show the fits of our M2var models. The black circles with error bars show the observed constraints. The red and blue points indicate the models with the old high-Z GS98 composition and the low-Z AGSS09 composition, respectively.