The SAMI galaxy survey: gas velocity dispersions in low-z star-forming galaxies and the drivers of turbulence

被引：0

作者：

Varidel M.R. ^{[1
,2
]}

Croom S.M. ^{[1
,2
]}

Lewis G.F. ^{[1
]}

Fisher D.B. ^{[2
,3
]}

Glazebrook K. ^{[2
,3
]}

Catinella B. ^{[2
,4
]}

Cortese L. ^{[2
,4
]}

Krumholz M.R. ^{[2
,5
,6
,7
]}

Bland-Hawthorn J. ^{[1
,2
]}

Bryant J.J. ^{[1
,2
,8
]}

Groves B. ^{[2
,4
,5
]}

Brough S. ^{[2
,9
]}

Federrath C. ^{[5
]}

Lawrence J.S. ^{[10
]}

Lorente N.P. ^{[11
]}

Owers M.S. ^{[12
,13
]}

Richards S.N. ^{[14
]}

López-Sánchez Á.R. ^{[8
,12
]}

Sweet S.M. ^{[2
,15
]}

van de Sande J. ^{[1
,2
]}

Vaughan S.P. ^{[1
,2
]}

机构：

[1] School of Physics, Sydney Institute for Astronomy (SIfA), University of Sydney, A28, 2006, NSW

[2] Centre for Astrophysics and Supercomputing, Swinburne University of Technology, PO Box 218, Hawthorn, 3122, VIC

[3] International Centre for Radio Astronomy Research, University of Western Australia, 35 Stirling Highway, Crawley, 6009, WA

[4] Research School of Astronomy and Astrophysics, Australian National University, Canberra, 2611, ACT

[5] Zentrum für Astronomie, Institut für Theoretische Astrophysik, Universität Heidelberg, Heidelberg

[6] Max Planck Institute for Astronomy, Königstuhl 17, Heidelberg

[7] Australian Astronomical Optics, AAO-USydney, School of Physics, University of Sydney, 2006, NSW

[8] School of Physics, University of New South Wales, 2052, NSW

[9] Australian Astronomical Optics, Macquarie University, 105 Delhi Rd, North Ryde, 2113, NSW

[10] Faculty of Science & Engineering, Macquarie University., 105 Delhi Rd, North Ryde, 2113, NSW

[11] Department of Physics and Astronomy, Macquarie University, 2109, NSW

[12] Astronomy, Astrophysics and Astrophotonics Research Centre, Macquarie University, Sydney, 2109, NSW

[13] SOFIA Science Center, USRA, NASA Ames Research Center, Building N232, M/S 232-12, P.O. Box 1, Moffett Field, 94035-0001, CA

[14] School of Mathematics and Physics, University of Queensland, Brisbane, 4072, QLD

来源：

Varidel, Mathew R. (mathew.varidel@sydney.edu.au) | 1600年 / Oxford University Press卷 / 495期

基金：

澳大利亚研究理事会;

关键词：

Galaxies: disc; Methods: data analysis; Methods: statistical; Techniques: imaging spectroscopy;

D O I：

10.1093/MNRAS/STAA1272

中图分类号：

学科分类号：

摘要：

We infer the intrinsic ionized gas kinematics for 383 star-forming galaxies across a range of integrated star formation rates (SFR ∈ [10−3, 102] M yr−1) at z 0.1 using a consistent 3D forward-modelling technique. The total sample is a combination of galaxies from the Sydney-AAO Multiobject Integral field Spectrograph (SAMI) Galaxy survey and DYnamics of Newly Assembled Massive Objects survey. For typical low-z galaxies taken from the SAMI Galaxy Survey, we find the vertical velocity dispersion (σv,z) to be positively correlated with measures of SFR, stellar mass, H I gas mass, and rotational velocity. The greatest correlation is with SFR surface density (SFR). Using the total sample, we find σv,z increases slowly as a function of integrated SFR in the range SFR ∈ [10−3, 1] M yr−1 from 17 ± 3 to 24 ± 5 km s−1 followed by a steeper increase up to σv,z -80 km s−1 for SFR 1 M yr−1. This is consistent with recent theoretical models that suggest a σv,z floor driven by star formation feedback processes with an upturn in σv,z at higher SFR driven by gravitational transport of gas through the disc. © 2020 The Author(s)

引用

页码：2265 / 2284

页数：19

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