We present a simultaneous calculation of heavy single-Λ hypernuclei
and compact stars containing hypernuclear core within a relativistic density
functional theory based on a Lagrangian which includes the hyperon octet and
lightest isoscalar-isovector mesons which couple to baryons with
density-dependent couplings. The corresponding density functional allows for
SU(6) symmetry breaking and mixing in the isoscalar sector, whereby the
departures in the σ-Λ and σ-Σ couplings away from
their values implied by the SU(3) symmetric model are used to adjust the theory
to the laboratory and astronomical data. We fix σ-Λ coupling
using the data on the single-Λ hypernuclei and derive an upper bound on
the σ-Σ from the requirement that the lower bound on the maximum
mass of a compact star is 2M⊙.Comment: 10 pages, 4 figures, to appear in Phys. Lett. B, v2: minor editorial
correction