%0 Generic %1 jaacks2017baseline %A Jaacks, Jason %A Thompson, Robert %A Finkelstein, Steven L. %A Bromm, Volker %D 2017 %K PopIII enrichment metal simulations %T Baseline Metal Enrichment from Population III Star Formation in Cosmological Volume Simulations %U http://arxiv.org/abs/1705.08059 %X We utilize the hydrodynamic and N-body code GIZMO coupled with our newly developed sub-grid PopulationIII (Pop III) Legacy model, designed specifically for cosmological volume simulations, to study the baseline metal enrichment from Pop III star formation at $z>7$. We find that our model star formation rate density (SFRD), which peaks at $10^-3\ M_yr^-1 Mpc^-1$ near $z\sim10$, agrees well with previous numerical studies and is consistent with the observed estimates for Pop II SFRDs. The mean Pop III metallicity rises smoothly from $z=25-7$, but does not reach the critical metallicity value, $Z_crit=10^-4\ Z_ødot$, required for the Pop III to Pop II transition in star formation mode until $z\simeq7$. This suggests that Pop III star formation is not a globally self-terminating process. The maximum enrichment from Pop III star formation in star forming dark matter halos is $Z\sim10^-2\ Z_ødot$, whereas the minimum found in externally enriched haloes is $Z\gtrsim10^-7\ Z_ødot$. Finally, mock observations of our simulated IGM enriched with Pop III metals produce equivalent widths similar to observations of an extremely metal poor damped Lyman alpha (DLA) system at $z=7.04$, which is thought to be enriched by Pop III star formation only.

@misc{jaacks2017baseline, abstract = {We utilize the hydrodynamic and N-body code GIZMO coupled with our newly developed sub-grid PopulationIII (Pop III) Legacy model, designed specifically for cosmological volume simulations, to study the baseline metal enrichment from Pop III star formation at $z>7$. We find that our model star formation rate density (SFRD), which peaks at $\sim 10^{-3}\ {\rm M_\odot yr^{-1} Mpc^{-1}}$ near $z\sim10$, agrees well with previous numerical studies and is consistent with the observed estimates for Pop II SFRDs. The mean Pop III metallicity rises smoothly from $z=25-7$, but does not reach the critical metallicity value, $Z_{\rm crit}=10^{-4}\ Z_\odot$, required for the Pop III to Pop II transition in star formation mode until $z\simeq7$. This suggests that Pop III star formation is not a globally self-terminating process. The maximum enrichment from Pop III star formation in star forming dark matter halos is $Z\sim10^{-2}\ Z_\odot$, whereas the minimum found in externally enriched haloes is $Z\gtrsim10^{-7}\ Z_\odot$. Finally, mock observations of our simulated IGM enriched with Pop III metals produce equivalent widths similar to observations of an extremely metal poor damped Lyman alpha (DLA) system at $z=7.04$, which is thought to be enriched by Pop III star formation only.}, added-at = {2017-05-24T09:49:10.000+0200}, author = {Jaacks, Jason and Thompson, Robert and Finkelstein, Steven L. and Bromm, Volker}, biburl = {https://www.bibsonomy.org/bibtex/2906bdaa5e5235752cc89b2447c748d4a/miki}, description = {[1705.08059] Baseline Metal Enrichment from Population III Star Formation in Cosmological Volume Simulations}, interhash = {190a3ed4969de34427f6e97503650f46}, intrahash = {906bdaa5e5235752cc89b2447c748d4a}, keywords = {PopIII enrichment metal simulations}, note = {cite arxiv:1705.08059Comment: 16 pages, 13 figures}, timestamp = {2017-05-24T09:49:10.000+0200}, title = {Baseline Metal Enrichment from Population III Star Formation in Cosmological Volume Simulations}, url = {http://arxiv.org/abs/1705.08059}, year = 2017 }