The SAMI Galaxy Survey: extraplanar gas, galactic winds and their association with star formation history

• DOI: 10.1093/mnras/stw017
• Publication Date: 2016-02-03T01:09:26Z
• Authors: I-Ting Ho (何宜庭); Anne M. Medling; Joss Bland-Hawthorn; Brent Groves; Lisa J. Kewley; Chiaki Kobayashi; Michael A. Dopita; Sarah K. Leslie; Rob Sharp; James T. Allen; Nathan Bourne; Julia J. Bryant; Luca Cortese; Scott M. Croom; Loretta Dunne; L. M. R. Fogarty; Michael Goodwin; Andy W. Green; Iraklis S. Konsta...; Jon S. Lawrence; Nuria P. F. Lorente; Matt S. Owers; Samuel Richards; Sarah M. Sweet; Edoardo Tescari; Elisabetta Valiante
• Keywords: Velocity dispersion; Stellar mass

We investigate a sample of 40 local, main-sequence, edge-on disc galaxies using integral field spectroscopy with the Sydney-AAO Multi-object Integral spectrograph (SAMI) Galaxy Survey to understand link between properties extraplanar gas and their host galaxies. The kinematics gas, including velocity asymmetries increased dispersion, are used differentiate hosting large-scale galactic winds from those dominated by extended diffuse ionized gas. find rather that spectrum gas-dominated wind exist. wind-dominated span wide range star formation rates ($-1 \lesssim \log({\rm SFR/M_{\odot} yr^{-1}}) 0.5$) across whole stellar mass ($8.5 M_{*}/M_{\odot}}) 11$). also in SFR surface densities ($10^{-3} \textrm{--} 10^{-1.5}\rm~M_{\odot} ~yr^{-1}~kpc^{-2}$) is much lower than canonical threshold $\rm0.1~M_{\odot} ~yr^{-1}~kpc^{-2}$. on average have higher $\rm H\delta_A$ values without strong signatures. enhanced indicates bursts recent past necessary for driving winds. demonstrate Sloan Digital Sky data high density experienced past. Our results imply revealed our study indeed driven formation, thus probing time domain crucial finding understanding