We investigate a sample of 40 local, main-sequence, edge-on disk galaxies
using integral field spectroscopy with the SAMI Galaxy Survey to understand the
link between properties of the extraplanar gas and their host galaxies. The
kinematics properties of the extraplanar gas, including velocity asymmetries
and increased dispersion, are used to differentiate galaxies hosting
large-scale galactic winds from those dominated by the extended diffuse ionised
gas. We find rather that a spectrum of diffuse gas-dominated to wind dominated
galaxies exist. The wind-dominated galaxies span a wide range of star formation
rates (-1 < log(SFR / Msun yr^-1) < 0.5) across the whole stellar mass range
of the sample (8.5 < log(M*/Msun) < 11). The wind galaxies also span a wide
range in SFR surface densities (10^-3 - 10^-1.5 Msun yr^-1 kpc^-2) that
is much lower than the canonical threshold of 0.1 Msun yr^-1 kpc^-2. The
wind galaxies on average have higher SFR surface densities and higher Hdelta_A
values than those without strong wind signatures. The enhanced Hdelta_A
indicates that bursts of star formation in the recent past is necessary for
driving large-scale galactic winds. We demonstrate with SDSS data that galaxies
with high SFR surface density have experienced bursts of star formation in the
recent past. Our results imply that the galactic winds revealed in our study
are indeed driven by bursts of star formation, and thus probing star formation
in the time domain is crucial for finding and understanding galactic winds.
Description
[1601.02022] The SAMI Galaxy Survey: extraplanar gas, galactic winds, and their association with star formation history
%0 Generic
%1 ho2016galaxy
%A Ho, I-Ting
%A Medling, Anne M.
%A Bland-Hawthorn, Joss
%A Groves, Brent
%A Kewley, Lisa J.
%A Kobayashi, Chiaki
%A Dopita, Michael A.
%A Leslie, Sarah K.
%A Sharp, Rob
%A Allen, James T.
%A Bourne, Nathan
%A Bryant, Julia J.
%A Cortese, Luca
%A Croom, Scott M.
%A Dunne, Loretta
%A Fogarty, L. M. R.
%A Goodwin, Michael
%A Green, Andy W.
%A Konstantopoulos, Iraklis S.
%A Lawrence, Jon S.
%A Lorente, Nuria P. F.
%A Owers, Matt S.
%A Richards, Samuel
%A Sweet, Sarah M.
%A Tescari, Edoardo
%A Valiante, Elisabetta
%D 2016
%K Ha emission extraplanar gas winds
%T The SAMI Galaxy Survey: extraplanar gas, galactic winds, and their
association with star formation history
%U http://arxiv.org/abs/1601.02022
%X We investigate a sample of 40 local, main-sequence, edge-on disk galaxies
using integral field spectroscopy with the SAMI Galaxy Survey to understand the
link between properties of the extraplanar gas and their host galaxies. The
kinematics properties of the extraplanar gas, including velocity asymmetries
and increased dispersion, are used to differentiate galaxies hosting
large-scale galactic winds from those dominated by the extended diffuse ionised
gas. We find rather that a spectrum of diffuse gas-dominated to wind dominated
galaxies exist. The wind-dominated galaxies span a wide range of star formation
rates (-1 < log(SFR / Msun yr^-1) < 0.5) across the whole stellar mass range
of the sample (8.5 < log(M*/Msun) < 11). The wind galaxies also span a wide
range in SFR surface densities (10^-3 - 10^-1.5 Msun yr^-1 kpc^-2) that
is much lower than the canonical threshold of 0.1 Msun yr^-1 kpc^-2. The
wind galaxies on average have higher SFR surface densities and higher Hdelta_A
values than those without strong wind signatures. The enhanced Hdelta_A
indicates that bursts of star formation in the recent past is necessary for
driving large-scale galactic winds. We demonstrate with SDSS data that galaxies
with high SFR surface density have experienced bursts of star formation in the
recent past. Our results imply that the galactic winds revealed in our study
are indeed driven by bursts of star formation, and thus probing star formation
in the time domain is crucial for finding and understanding galactic winds.
@misc{ho2016galaxy,
abstract = {We investigate a sample of 40 local, main-sequence, edge-on disk galaxies
using integral field spectroscopy with the SAMI Galaxy Survey to understand the
link between properties of the extraplanar gas and their host galaxies. The
kinematics properties of the extraplanar gas, including velocity asymmetries
and increased dispersion, are used to differentiate galaxies hosting
large-scale galactic winds from those dominated by the extended diffuse ionised
gas. We find rather that a spectrum of diffuse gas-dominated to wind dominated
galaxies exist. The wind-dominated galaxies span a wide range of star formation
rates (-1 < log(SFR / Msun yr^{-1}) < 0.5) across the whole stellar mass range
of the sample (8.5 < log(M*/Msun) < 11). The wind galaxies also span a wide
range in SFR surface densities (10^{-3} - 10^{-1.5} Msun yr^{-1} kpc^{-2}) that
is much lower than the canonical threshold of 0.1 Msun yr^{-1} kpc^{-2}. The
wind galaxies on average have higher SFR surface densities and higher Hdelta_A
values than those without strong wind signatures. The enhanced Hdelta_A
indicates that bursts of star formation in the recent past is necessary for
driving large-scale galactic winds. We demonstrate with SDSS data that galaxies
with high SFR surface density have experienced bursts of star formation in the
recent past. Our results imply that the galactic winds revealed in our study
are indeed driven by bursts of star formation, and thus probing star formation
in the time domain is crucial for finding and understanding galactic winds.},
added-at = {2016-01-12T10:12:41.000+0100},
author = {Ho, I-Ting and Medling, Anne M. and Bland-Hawthorn, Joss and Groves, Brent and Kewley, Lisa J. and Kobayashi, Chiaki and Dopita, Michael A. and Leslie, Sarah K. and Sharp, Rob and Allen, James T. and Bourne, Nathan and Bryant, Julia J. and Cortese, Luca and Croom, Scott M. and Dunne, Loretta and Fogarty, L. M. R. and Goodwin, Michael and Green, Andy W. and Konstantopoulos, Iraklis S. and Lawrence, Jon S. and Lorente, Nuria P. F. and Owers, Matt S. and Richards, Samuel and Sweet, Sarah M. and Tescari, Edoardo and Valiante, Elisabetta},
biburl = {https://www.bibsonomy.org/bibtex/20938554da1e57176445928b0793dc823/miki},
description = {[1601.02022] The SAMI Galaxy Survey: extraplanar gas, galactic winds, and their association with star formation history},
interhash = {ab72e8bcdf5827f33535d1821ad93255},
intrahash = {0938554da1e57176445928b0793dc823},
keywords = {Ha emission extraplanar gas winds},
note = {cite arxiv:1601.02022Comment: 26 pages, 16 figures and 1 table. Accepted to MNRAS},
timestamp = {2016-01-12T10:12:41.000+0100},
title = {The SAMI Galaxy Survey: extraplanar gas, galactic winds, and their
association with star formation history},
url = {http://arxiv.org/abs/1601.02022},
year = 2016
}