%0 Generic %1 yajima2016upper %A Yajima, Hidenobu %A Khochfar, Sadegh %D 2016 %K galaxies luminosity mass popIII %T Upper limits on the mass and luminosity of Population III-dominated galaxies %U http://arxiv.org/abs/1610.04249 %X 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 Ly$\alpha$ radiation drag and the gas accretion onto a galactic centre. Our model predicts that POPIII-dominated galaxies at z ~ 7 are hosted by haloes with $M_halo 1.5 \times 10^8 - 1.1 10^9 ~M_ødot$, that they have Ly$\alpha$ luminosities of $L_Ly\alpha 3.0 10^42 - 2.1 10^43$ erg/s, stellar mass of $M_star 0.8 10^5 - 2.5 10^6 ~M_ødot$, and outflowing gas with velocities $V_out 40$ km/s due to Ly$\alpha$ radiation pressure. We show that the POPIII galaxy candidate CR7 violates the derived limits on stellar mass and Ly$\alpha$ luminosity and thus is unlikely to be a POPIII galaxy. POPIII-dominated galaxies at z ~ 7 have HeII line emission that is ~1- 3 orders of magnitude lower then that of Ly$\alpha$, they have high Ly$\alpha$ equivalent width of > 300 $\AA$ and should be found close to bright star forming galaxies. The HeII 1640 $\AA$ line is in comfortable reach of next generation telescopes, like the JWST or TMT.

@misc{yajima2016upper, abstract = {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 Ly$\alpha$ radiation drag and the gas accretion onto a galactic centre. Our model predicts that POPIII-dominated galaxies at z ~ 7 are hosted by haloes with $M_{\rm halo} \sim 1.5 \times 10^{8} - 1.1 \times 10^{9} \rm ~M_{\odot}$, that they have Ly$\alpha$ luminosities of $L_{\rm Ly\alpha} \sim 3.0 \times 10^{42} - 2.1 \times 10^{43}$ erg/s, stellar mass of $M_{\rm star} \sim 0.8 \times 10^{5} - 2.5 \times 10^{6} \rm ~M_{\odot}$, and outflowing gas with velocities $V_{\rm out} \sim 40$ km/s due to Ly$\alpha$ radiation pressure. We show that the POPIII galaxy candidate CR7 violates the derived limits on stellar mass and Ly$\alpha$ luminosity and thus is unlikely to be a POPIII galaxy. POPIII-dominated galaxies at z ~ 7 have HeII line emission that is ~1- 3 orders of magnitude lower then that of Ly$\alpha$, they have high Ly$\alpha$ equivalent width of > 300 $\AA$ and should be found close to bright star forming galaxies. The HeII 1640 $\AA$ line is in comfortable reach of next generation telescopes, like the JWST or TMT.}, added-at = {2016-10-17T09:52:15.000+0200}, author = {Yajima, Hidenobu and Khochfar, Sadegh}, biburl = {https://www.bibsonomy.org/bibtex/2d2299ef7bf7db711d04f1fa349e34c76/miki}, description = {[1610.04249] Upper limits on the mass and luminosity of Population III-dominated galaxies}, interhash = {9f3e8c84a2150033aadb37eea8b8986c}, intrahash = {d2299ef7bf7db711d04f1fa349e34c76}, keywords = {galaxies luminosity mass popIII}, note = {cite arxiv:1610.04249Comment: 5 pages, 1 figure, submitted to MNRAS Letters}, timestamp = {2016-10-17T09:52:15.000+0200}, title = {Upper limits on the mass and luminosity of Population III-dominated galaxies}, url = {http://arxiv.org/abs/1610.04249}, year = 2016 }