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We study baryo-charmonium [$\eta_{\rm c}$- and $J/\psi$-$N^*$, $\eta_{\rmc}(2S)$-, $\psi(2S)$- and $\chi_{\rm c}(1P)$-$N$] and baryo-bottomonium[$\eta_{\rm b}(2S)$-, $\Upsilon(2S)$- and $\chi_{\rm b}(1P)$-$N$] bound states,where $N$ is the nucleon and $N^*$ a nucleon resonance. In the baryo-quarkoniummodel, the five $qqq Q \bar Q$ quarks are arranged in terms of a heavyquarkonium core, $Q \bar Q$, embedded in light baryonic matter, $qqq$, with $q= u$ or $d$. The interaction between the $Q \bar Q$ core and the light baryoncan be written in terms of the QCD multipole expansion. The spectrum ofbaryo-charmonium states is calculated and the results compared with theexisting experimental data. In particular, we can interpret the recentlydiscovered $P_{\rm c}(4380)$ and $P_{\rm c}(4450)$ pentaquarks as$\psi(2S)$-$N$ and $\chi_{\rm c2}(1P)$-$N$ bound states, respectively. Weobserve that in the baryo-bottomonium sector the binding energies are, onaverage, slightly larger than those of baryo-charmonia. Because of this, thehidden-bottom pentaquarks are more likely to form than their hidden-charmcounterparts. We thus suggest the experimentalists to look for five-quarkstates in the hidden-bottom sector in the $10.4-10.9$ GeV energy region.

The baryo-quarkonium picture for hidden-charm and bottom pentaquarks and LHCb $P_{\rm c}(4380)$ and $P_{\rm c}(4450)$ states