SIMBAD references

We here derive upper limits on the mass and luminosity of Population III (POPIII) dominated proto-galaxies based on the collapse of primordial gas under the effect of angular momentum loss via Lyα radiation drag and the gas accretion on to a galactic centre. Our model predicts that POPIII-dominated galaxies at z ∼ 7 are hosted by haloes with M_h ∼ 1.5 x 10⁸-1.1 x 10⁹ M_☉, that they have Lyα luminosities of L_Lyα ∼ 3.0 x 10⁴²-2.1 x 10⁴³ erg/s, stellar mass of M_star ∼ 0.8 x 10⁵-2.5 x 10⁶ M_☉ and outflowing gas with velocities V_out ∼ 40 km s^- 1^ due to Lyα radiation pressure. We show that the POPIII galaxy candidate CR7 violates the derived limits on stellar mass and Lyα luminosity and thus is unlikely to be a POPIII galaxy. POPIII-dominated galaxies at z ∼ 7 have He II line emission that is ∼1-3 orders of magnitude lower than that of Lyα, they have high Lyα equivalent width of >= 300 Å and should be found close to bright star-forming galaxies. The He II 1640 Å line is in comfortable reach of next generation telescopes, like the James Webb Space Telescope (JWST) or Thirty Meter Telescope (TMT).