%0 Generic %1 heckman2015systematic %A Heckman, Timothy M. %A Alexandroff, Rachel M. %A Borthakur, Sanchayeeta %A Overzier, Roderik %A Leitherer, Claus %D 2015 %K absorption outflows phase warm %T The Systematic Properties of the Warm Phase of Starburst-Driven Galactic Winds %U http://arxiv.org/abs/1507.05622 %X Using ultra-violet absorption-lines, we analyze the systematic properties of the warm ionized phase of starburst-driven winds in a sample of 39 low-redshift objects that spans broad ranges in starburst and galaxy properties. Total column densities for the outflows are $\sim$10$^21$ cm$^-2$. The outflow velocity (v$_out$) correlates only weakly with the galaxy stellar mass (M$_*$), or circular velocity (v$_cir$), but strongly with both SFR and SFR/area. The normalized outflow velocity (v$_out/v_cir$) correlates well with both SFR/area and SFR/M$_*$. The estimated outflow rates of warm ionized gas ($M$) are $\sim$ 1 to 4 times the SFR, and the ratio $M/SFR$ does not correlate with v$_out$. We show that a model of a population of clouds accelerated by the combined forces of gravity and the momentum flux from the starburst matches the data. We find a threshold value for the ratio of the momentum flux supplied by the starburst to the critical momentum flux needed for the wind to overcome gravity acting on the clouds ($R_crit$). For $R_crit >$ 10 (strong-outflows) the outflow momentum flux is similar to the total momentum flux from the starburst and the outflow velocity exceeds the galaxy escape velocity. Neither is the case for the weak-outflows ($R_crit <$ 10). For the weak-outflows, the data severely disagree with many prescriptions in numerical simulations or semi-analytic models of galaxy evolution. The agreement is better for the strong-outflows, and we advocate the use of $R_crit$ to guide future prescriptions.

@misc{heckman2015systematic, abstract = {Using ultra-violet absorption-lines, we analyze the systematic properties of the warm ionized phase of starburst-driven winds in a sample of 39 low-redshift objects that spans broad ranges in starburst and galaxy properties. Total column densities for the outflows are $\sim$10$^{21}$ cm$^{-2}$. The outflow velocity (v$_{out}$) correlates only weakly with the galaxy stellar mass (M$_*$), or circular velocity (v$_{cir}$), but strongly with both SFR and SFR/area. The normalized outflow velocity (v$_{out}/v_{cir}$) correlates well with both SFR/area and SFR/M$_*$. The estimated outflow rates of warm ionized gas ($\dot{M}$) are $\sim$ 1 to 4 times the SFR, and the ratio $\dot{M}/SFR$ does not correlate with v$_{out}$. We show that a model of a population of clouds accelerated by the combined forces of gravity and the momentum flux from the starburst matches the data. We find a threshold value for the ratio of the momentum flux supplied by the starburst to the critical momentum flux needed for the wind to overcome gravity acting on the clouds ($R_{crit}$). For $R_{crit} >$ 10 (strong-outflows) the outflow momentum flux is similar to the total momentum flux from the starburst and the outflow velocity exceeds the galaxy escape velocity. Neither is the case for the weak-outflows ($R_{crit} <$ 10). For the weak-outflows, the data severely disagree with many prescriptions in numerical simulations or semi-analytic models of galaxy evolution. The agreement is better for the strong-outflows, and we advocate the use of $R_{crit}$ to guide future prescriptions.}, added-at = {2015-07-22T09:48:57.000+0200}, author = {Heckman, Timothy M. and Alexandroff, Rachel M. and Borthakur, Sanchayeeta and Overzier, Roderik and Leitherer, Claus}, biburl = {https://www.bibsonomy.org/bibtex/27c7a93204b186cef9cb6d7cb153de324/miki}, description = {[1507.05622] The Systematic Properties of the Warm Phase of Starburst-Driven Galactic Winds}, interhash = {1582ad153780ec28f12987ed1a327b23}, intrahash = {7c7a93204b186cef9cb6d7cb153de324}, keywords = {absorption outflows phase warm}, note = {cite arxiv:1507.05622Comment: Accepted for publication in ApJ. Contains 16 pages, 11 figure, and 2 tables}, timestamp = {2015-07-22T09:50:38.000+0200}, title = {The Systematic Properties of the Warm Phase of Starburst-Driven Galactic Winds}, url = {http://arxiv.org/abs/1507.05622}, year = 2015 }