%0 Generic %1 newman2012sinszcsinf %A Newman, Sarah F. %A Genzel, Reinhard %A Forster-Schreiber, Natascha %A Griffin, Kristin Shapiro %A Mancini, Chiara %A Lilly, Simon J. %A Renzini, Alvio %A Bouche, Nicolas %A Burkert, Andreas %A Buschkamp, Peter %A Carollo, C. Marcella %A Cresci, Giovanni %A Davies, Ric %A Eisenhauer, Frank %A Genel, Shy %A Hicks, Erin K. S. %A Kurk, Jaron %A Lutz, Dieter %A Naab, Thorsten %A Peng, Yingjie %A Sternberg, Amiel %A Tacconi, Linda J. %A Vergani, Daniela %A Wuyts, Stijn %A Zamorani, Gianni %D 2012 %K emission formation outflows star %T The SINS/zC-SINF survey of z~2 galaxy kinematics: Outflow properties %U http://arxiv.org/abs/1207.5897 %X Based on SINFONI Ha, NII and SII AO data of 30 z 2 star-forming galaxies (SFGs) from the SINS and zcSINF surveys, we find a strong correlation of the Ha broad flux fraction with the star formation surface density of the galaxy, with an apparent threshold for strong outflows occurring at 1 Msun yr^-1 kpc^-2. Above this threshold, we find that SFGs with logm_\ast>10 have similar or perhaps greater wind mass loading factors (eta = Mdotout/SFR) and faster outflow velocities than lower mass SFGs. This trend suggests that the majority of outflowing gas at z 2 may derive from high-mass SFGs, and that the z 2 mass-metallicity relation is driven more by dilution of enriched gas in the galaxy gas reservoir than by the efficiency of outflows. The mass loading factor is also correlated with the SFR and inclination, such that more star-forming and face-on galaxies launch more powerful outflows. For galaxies that have evidence for strong outflows, we find that the broad emission is spatially extended to at least the half-light radius (a few kpc). We propose that the observed threshold for strong outflows and the observed mass loading of these winds can be explained by a simple model wherein break-out of winds is governed by pressure balance in the disk. Using the ratio of the SII doublet in a broad and narrow component, we find that outflowing gas has a density of \sim10-100 cm^-3, significantly less than that of the star forming gas (600 cm^-3).

@misc{newman2012sinszcsinf, abstract = {Based on SINFONI Ha, [NII] and [SII] AO data of 30 z \sim 2 star-forming galaxies (SFGs) from the SINS and zcSINF surveys, we find a strong correlation of the Ha broad flux fraction with the star formation surface density of the galaxy, with an apparent threshold for strong outflows occurring at 1 Msun yr^-1 kpc^-2. Above this threshold, we find that SFGs with logm_\ast>10 have similar or perhaps greater wind mass loading factors (eta = Mdotout/SFR) and faster outflow velocities than lower mass SFGs. This trend suggests that the majority of outflowing gas at z \sim 2 may derive from high-mass SFGs, and that the z \sim 2 mass-metallicity relation is driven more by dilution of enriched gas in the galaxy gas reservoir than by the efficiency of outflows. The mass loading factor is also correlated with the SFR and inclination, such that more star-forming and face-on galaxies launch more powerful outflows. For galaxies that have evidence for strong outflows, we find that the broad emission is spatially extended to at least the half-light radius (\sim a few kpc). We propose that the observed threshold for strong outflows and the observed mass loading of these winds can be explained by a simple model wherein break-out of winds is governed by pressure balance in the disk. Using the ratio of the [SII] doublet in a broad and narrow component, we find that outflowing gas has a density of \sim10-100 cm^-3, significantly less than that of the star forming gas (600 cm^-3).}, added-at = {2012-07-26T14:55:06.000+0200}, author = {Newman, Sarah F. and Genzel, Reinhard and Forster-Schreiber, Natascha and Griffin, Kristin Shapiro and Mancini, Chiara and Lilly, Simon J. and Renzini, Alvio and Bouche, Nicolas and Burkert, Andreas and Buschkamp, Peter and Carollo, C. Marcella and Cresci, Giovanni and Davies, Ric and Eisenhauer, Frank and Genel, Shy and Hicks, Erin K. S. and Kurk, Jaron and Lutz, Dieter and Naab, Thorsten and Peng, Yingjie and Sternberg, Amiel and Tacconi, Linda J. and Vergani, Daniela and Wuyts, Stijn and Zamorani, Gianni}, biburl = {https://www.bibsonomy.org/bibtex/2d3eb21edf853b1e3689fed7dfc001314/miki}, description = {[1207.5897] The SINS/zC-SINF survey of z~2 galaxy kinematics: Outflow properties}, interhash = {7cc2153506a75c75d1fc9445d9f47122}, intrahash = {d3eb21edf853b1e3689fed7dfc001314}, keywords = {emission formation outflows star}, note = {cite arxiv:1207.5897Comment: Submitted to ApJ Letters}, timestamp = {2012-07-26T14:55:06.000+0200}, title = {The SINS/zC-SINF survey of z~2 galaxy kinematics: Outflow properties}, url = {http://arxiv.org/abs/1207.5897}, year = 2012 }