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

I. Ting Ho; 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. Konstantopoulos; Jon S. Lawrence; Nuria P.F. Lorente; Matt S. Owers; Samuel Richards; Sarah M. Sweet; Edoardo Tescari; Elisabetta Valiante

doi:10.1093/mnras/stw017

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

I. Ting Ho^*, 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. Konstantopoulos, Jon S. LawrenceNuria P.F. Lorente, Matt S. Owers, Samuel Richards, Sarah M. Sweet, Edoardo Tescari, Elisabetta Valiante

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

77 Citations (Scopus)

Abstract

We investigate a sample of 40 local, main-sequence, edge-on disc galaxies using integral field spectroscopy with the Sydney-AAO Multi-object Integral field spectrograph (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 ionized 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 (SFRs; -1 ≲ log (SFR/M_⊙ yr^-1) ≲ 0.5) across the whole stellar mass range of the sample (8.5 ≲ log (M_*/M_⊙) ≲ 11). The wind galaxies also span a wide range in SFR surface densities (10^-3-10^-1.5M_⊙ yr^-1 kpc^-2) that is much lower than the canonical threshold of 0.1M_⊙ yr^-1 kpc^-2. The wind galaxies on average have higher SFR surface densities and higher Hδ_A values than those without strong wind signatures. The enhanced Hδ_A indicates that bursts of star formation in the recent past are necessary for driving large-scale galactic winds. We demonstrate with Sloan Digital Sky Survey 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.

Original language	English
Pages (from-to)	1257-1278
Number of pages	22
Journal	Monthly Notices of the Royal Astronomical Society
Volume	457
Issue number	2
DOIs	https://doi.org/10.1093/mnras/stw017
Publication status	Published - 1 Apr 2016

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Ho, I. T., Medling, A. M., Bland-Hawthorn, J., Groves, B., Kewley, L. J., Kobayashi, C., Dopita, M. A., Leslie, S. K., Sharp, R., Allen, J. T., Bourne, N., Bryant, J. J., Cortese, L., Croom, S. M., Dunne, L., Fogarty, L. M. R., Goodwin, M., Green, A. W., Konstantopoulos, I. S., ... Valiante, E. (2016). The SAMI Galaxy Survey: Extraplanar gas, galactic winds and their association with star formation history. Monthly Notices of the Royal Astronomical Society, 457(2), 1257-1278. https://doi.org/10.1093/mnras/stw017

@article{d35cc3a1d31f4588a0c85d3674b42eaf,

title = "The SAMI Galaxy Survey: Extraplanar gas, galactic winds and their association with star formation history",

abstract = "We investigate a sample of 40 local, main-sequence, edge-on disc galaxies using integral field spectroscopy with the Sydney-AAO Multi-object Integral field spectrograph (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 ionized 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 (SFRs; -1 ≲ log (SFR/M⊙ yr-1) ≲ 0.5) across the whole stellar mass range of the sample (8.5 ≲ log (M*/M⊙) ≲ 11). The wind galaxies also span a wide range in SFR surface densities (10-3-10-1.5M⊙ yr-1 kpc-2) that is much lower than the canonical threshold of 0.1M⊙ yr-1 kpc-2. The wind galaxies on average have higher SFR surface densities and higher HδA values than those without strong wind signatures. The enhanced HδA indicates that bursts of star formation in the recent past are necessary for driving large-scale galactic winds. We demonstrate with Sloan Digital Sky Survey 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.",

keywords = "Galaxies: ISM, Galaxies: evolution, Galaxies: kinematics and dynamics, Galaxies: starburst",

author = "Ho, {I. Ting} and Medling, {Anne M.} and Joss Bland-Hawthorn and Brent Groves and Kewley, {Lisa J.} and Chiaki Kobayashi and Dopita, {Michael A.} and Leslie, {Sarah K.} and Rob Sharp and Allen, {James T.} and Nathan Bourne and Bryant, {Julia J.} and Luca Cortese and Croom, {Scott M.} and Loretta Dunne and Fogarty, {L. M.R.} and Michael Goodwin and Green, {Andy W.} and Konstantopoulos, {Iraklis S.} and Lawrence, {Jon S.} and Lorente, {Nuria P.F.} and Owers, {Matt S.} and Samuel Richards and Sweet, {Sarah M.} and Edoardo Tescari and Elisabetta Valiante",

note = "Publisher Copyright: {\textcopyright} 2016 The Authors.",

year = "2016",

month = apr,

day = "1",

doi = "10.1093/mnras/stw017",

language = "English",

volume = "457",

pages = "1257--1278",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press ",

number = "2",

}

Ho, IT, Medling, AM, Bland-Hawthorn, J, Groves, B, Kewley, LJ, Kobayashi, C, Dopita, MA, Leslie, SK, Sharp, R, Allen, JT, Bourne, N, Bryant, JJ, Cortese, L, Croom, SM, Dunne, L, Fogarty, LMR, Goodwin, M, Green, AW, Konstantopoulos, IS, Lawrence, JS, Lorente, NPF, Owers, MS, Richards, S, Sweet, SM, Tescari, E & Valiante, E 2016, 'The SAMI Galaxy Survey: Extraplanar gas, galactic winds and their association with star formation history', Monthly Notices of the Royal Astronomical Society, vol. 457, no. 2, pp. 1257-1278. https://doi.org/10.1093/mnras/stw017

TY - JOUR

T1 - The SAMI Galaxy Survey

T2 - Extraplanar gas, galactic winds and their association with star formation history

AU - Ho, I. Ting

AU - Medling, Anne M.

AU - Bland-Hawthorn, Joss

AU - Groves, Brent

AU - Kewley, Lisa J.

AU - Kobayashi, Chiaki

AU - Dopita, Michael A.

AU - Leslie, Sarah K.

AU - Sharp, Rob

AU - Allen, James T.

AU - Bourne, Nathan

AU - Bryant, Julia J.

AU - Cortese, Luca

AU - Croom, Scott M.

AU - Dunne, Loretta

AU - Fogarty, L. M.R.

AU - Goodwin, Michael

AU - Green, Andy W.

AU - Konstantopoulos, Iraklis S.

AU - Lawrence, Jon S.

AU - Lorente, Nuria P.F.

AU - Owers, Matt S.

AU - Richards, Samuel

AU - Sweet, Sarah M.

AU - Tescari, Edoardo

AU - Valiante, Elisabetta

PY - 2016/4/1

Y1 - 2016/4/1

N2 - We investigate a sample of 40 local, main-sequence, edge-on disc galaxies using integral field spectroscopy with the Sydney-AAO Multi-object Integral field spectrograph (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 ionized 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 (SFRs; -1 ≲ log (SFR/M⊙ yr-1) ≲ 0.5) across the whole stellar mass range of the sample (8.5 ≲ log (M*/M⊙) ≲ 11). The wind galaxies also span a wide range in SFR surface densities (10-3-10-1.5M⊙ yr-1 kpc-2) that is much lower than the canonical threshold of 0.1M⊙ yr-1 kpc-2. The wind galaxies on average have higher SFR surface densities and higher HδA values than those without strong wind signatures. The enhanced HδA indicates that bursts of star formation in the recent past are necessary for driving large-scale galactic winds. We demonstrate with Sloan Digital Sky Survey 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.

AB - We investigate a sample of 40 local, main-sequence, edge-on disc galaxies using integral field spectroscopy with the Sydney-AAO Multi-object Integral field spectrograph (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 ionized 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 (SFRs; -1 ≲ log (SFR/M⊙ yr-1) ≲ 0.5) across the whole stellar mass range of the sample (8.5 ≲ log (M*/M⊙) ≲ 11). The wind galaxies also span a wide range in SFR surface densities (10-3-10-1.5M⊙ yr-1 kpc-2) that is much lower than the canonical threshold of 0.1M⊙ yr-1 kpc-2. The wind galaxies on average have higher SFR surface densities and higher HδA values than those without strong wind signatures. The enhanced HδA indicates that bursts of star formation in the recent past are necessary for driving large-scale galactic winds. We demonstrate with Sloan Digital Sky Survey 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.

KW - Galaxies: ISM

KW - Galaxies: evolution

KW - Galaxies: kinematics and dynamics

KW - Galaxies: starburst

UR - http://www.scopus.com/inward/record.url?scp=84963611545&partnerID=8YFLogxK

U2 - 10.1093/mnras/stw017

DO - 10.1093/mnras/stw017

M3 - Article

SN - 0035-8711

VL - 457

SP - 1257

EP - 1278

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 2

ER -

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

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