Cosmological constraints from HII starburst galaxy apparent magnitude and other cosmological measurements

We use H II starburst galaxy apparent magnitude measurements to constrain cosmological parameters in six cosmological models. A joint analysis of HII galaxy, quasar angular size, baryon acoustic oscillations peak length scale, and Hubble parameter measurements result in relatively model-independent and restrictive estimates of the current values of the non-relativistic matter density parameter Omega(m0) and the Hubble constant H-0. These estimates favour a 2.0-3.4 sigma (depending on cosmological model) lower H-0 than what is measured from the local expansion rate. The combined data are consistent with dark energy being a cosmological constant and with flat spatial hypersurfaces, but do not strongly rule out mild dark energy dynamics or slightly non-flat spatial geometries.