%0 Generic %1 Freeland2011 %A Freeland, E. %A Tran, K-V. %A Irwin, T. %A Giordano, L. %A Saintonge, A. %A Gonzalez, A. %A Zaritsky, D. %A Just, D. %D 2011 %K galaxy winds %T Detection of Outflowing and Extraplanar Gas in Disks in an Assembling Galaxy Cluster at z=0.37 %U http://arxiv.org/abs/1111.0289 %X We detect ionized gas characteristics indicative of winds in three disk-dominated galaxies that are members of a super-group at z=0.37 that will merge to form a Coma-mass cluster. All three galaxies are IR-luminous (L_IR > 4 x 10^10 L_sun, SFR >8 M_sun per year) and lie outside the X-ray cores of the galaxy groups. We find that the most IR-luminous galaxy has strong blue and redshifted emission lines with velocities of ~ +/-200 km/s and a third, blueshifted (~ 900 km/s) component. This galaxy's line-widths (Hb, OIII5007, NII, Ha) correspond to velocities of 100-1000 km/s. We detect extraplanar gas in two of three galaxies with SFR > 8 M_sun per year whose orientations are approximately edge-on and which have IFU spaxels off the stellar disk. IFU maps reveal that the extraplanar gas extends to r_h ~ 10 kpc; NII and Ha line-widths correspond to velocities of ~200-400 km/s in the disk and decrease to ~50-150 km/s above the disk. Multi-wavelength observations indicate that the emission is dominated by star formation. Including the most IR-luminous galaxy we find that 18% of supergroup members with SFR > 8 M_sun per year show ionized gas characteristics indicative of outflows. This is a lower limit as showing that gas is outflowing in the remaining, moderately inclined, galaxies requires a non-trivial decoupling of contributions to the emission lines from rotational and turbulent motion. Ionized gas mass loss in these winds is ~0.1 M_sun per year for each galaxy, although the winds are likely to entrain significantly larger amounts of mass in neutral and molecular gas.

@misc{Freeland2011, abstract = { We detect ionized gas characteristics indicative of winds in three disk-dominated galaxies that are members of a super-group at z=0.37 that will merge to form a Coma-mass cluster. All three galaxies are IR-luminous (L_IR > 4 x 10^{10} L_sun, SFR >8 M_sun per year) and lie outside the X-ray cores of the galaxy groups. We find that the most IR-luminous galaxy has strong blue and redshifted emission lines with velocities of ~ +/-200 km/s and a third, blueshifted (~ 900 km/s) component. This galaxy's line-widths (Hb, [OIII]5007, [NII], Ha) correspond to velocities of 100-1000 km/s. We detect extraplanar gas in two of three galaxies with SFR > 8 M_sun per year whose orientations are approximately edge-on and which have IFU spaxels off the stellar disk. IFU maps reveal that the extraplanar gas extends to r_h ~ 10 kpc; [NII] and Ha line-widths correspond to velocities of ~200-400 km/s in the disk and decrease to ~50-150 km/s above the disk. Multi-wavelength observations indicate that the emission is dominated by star formation. Including the most IR-luminous galaxy we find that 18% of supergroup members with SFR > 8 M_sun per year show ionized gas characteristics indicative of outflows. This is a lower limit as showing that gas is outflowing in the remaining, moderately inclined, galaxies requires a non-trivial decoupling of contributions to the emission lines from rotational and turbulent motion. Ionized gas mass loss in these winds is ~0.1 M_sun per year for each galaxy, although the winds are likely to entrain significantly larger amounts of mass in neutral and molecular gas. }, added-at = {2011-11-02T17:50:25.000+0100}, author = {Freeland, E. and Tran, K-V. and Irwin, T. and Giordano, L. and Saintonge, A. and Gonzalez, A. and Zaritsky, D. and Just, D.}, biburl = {https://www.bibsonomy.org/bibtex/2b67fb9e6e8a475132f854d5c4c0de2b9/miki}, description = {[1111.0289] Detection of Outflowing and Extraplanar Gas in Disks in an Assembling Galaxy Cluster at z=0.37}, interhash = {61ff7883ed88b411fcb925bab169b53c}, intrahash = {b67fb9e6e8a475132f854d5c4c0de2b9}, keywords = {galaxy winds}, note = {cite arxiv:1111.0289 Comment: 6 pages, 3 figures (slightly degraded in quality), accepted for publication in ApJL}, timestamp = {2011-11-02T17:50:25.000+0100}, title = {Detection of Outflowing and Extraplanar Gas in Disks in an Assembling Galaxy Cluster at z=0.37}, url = {http://arxiv.org/abs/1111.0289}, year = 2011 }