Molecular gas, CO, and star formation in galaxies: emergent empirical relations, feedback, and the evolution of very gas-rich systems TeX Export

@article{citeulike:6014692, abstract = {We use time-varying models of the coupled evolution of the HI, H\_2 gas phases and stars in galaxy-sized numerical simulations to: a) test for the emergence of the Kennicutt-Schmidt (K-S) and the H\_2-pressure relation, b) explore a realistic H\_2-regulated star formation recipe which brings forth a neglected and potentially significant SF-regulating factor, and c) go beyond typical galactic environments (for which these galactic empirical relations are deduced) to explore the early evolution of very gas-rich galaxies. In this work we model low mass galaxies (\$M\_{\rm baryon} \le 10^9 \msun\$), while incorporating an independent treatment of CO formation and destruction, the most important tracer molecule of H2 in galaxies, along with that for the H2 gas itself. We find that both the K-S and the H\_2-pressure empirical relations can robustly emerge in galaxies after a dynamic equilibrium sets in between the various ISM states, the stellar component and its feedback. (abridged)}, archivePrefix = {arXiv}, author = {Pelupessy, Federico I. and Papadopoulos, Padelis P.}, citeulike-article-id = {6014692}, citeulike-linkout-0 = {http://arxiv.org/abs/0910.4905}, citeulike-linkout-1 = {http://arxiv.org/pdf/0910.4905}, day = {3}, eprint = {0910.4905}, keywords = {co, evolution, galaxies, gas, h2, hi, model, molecule, starform}, month = {Nov}, posted-at = {2009-11-04 23:48:06}, priority = {2}, title = {Molecular gas, CO, and star formation in galaxies: emergent empirical relations, feedback, and the evolution of very gas-rich systems}, url = {http://arxiv.org/abs/0910.4905}, year = {2009} }

TY - JOUR ID - citeulike:6014692 L3 - citeulike-article-id:6014692 N2 - We use time-varying models of the coupled evolution of the HI, H_2 gas phases and stars in galaxy-sized numerical simulations to: a) test for the emergence of the Kennicutt-Schmidt (K-S) and the H_2-pressure relation, b) explore a realistic H_2-regulated star formation recipe which brings forth a neglected and potentially significant SF-regulating factor, and c) go beyond typical galactic environments (for which these galactic empirical relations are deduced) to explore the early evolution of very gas-rich galaxies. In this work we model low mass galaxies ($M_{\rm baryon} \le 10^9 \msun$), while incorporating an independent treatment of CO formation and destruction, the most important tracer molecule of H2 in galaxies, along with that for the H2 gas itself. We find that both the K-S and the H_2-pressure empirical relations can robustly emerge in galaxies after a dynamic equilibrium sets in between the various ISM states, the stellar component and its feedback. (abridged) TI - Molecular gas, CO, and star formation in galaxies: emergent empirical relations, feedback, and the evolution of very gas-rich systems KW - co KW - evolution KW - galaxies KW - gas KW - h2 KW - hi KW - model KW - molecule KW - starform AU - Pelupessy, Federico AU - Papadopoulos, Padelis PY - 2009/Nov/03/ UR - http://arxiv.org/abs/0910.4905 ER -