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

Mathew R. Varidel; Scott M. Croom; Geraint F. Lewis; Deanne B. Fisher; Karl Glazebrook; Barbara Catinella; Luca Cortese; Mark R. Krumholz; Joss Bland-Hawthorn; Julia J. Bryant; Brent Groves; Sarah Brough; Christoph Federrath; Jon S. Lawrence; Nuria P. Lorente; Matt S. Owers; Samuel N. Richards; Ángel R. López-Sánchez; Sarah M. Sweet; Jesse van de Sande; Sam P. Vaughan

doi:10.1093/MNRAS/STAA1272

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

Mathew R. Varidel^*, Scott M. Croom, Geraint F. Lewis, Deanne B. Fisher, Karl Glazebrook, Barbara Catinella, Luca Cortese, Mark R. Krumholz, Joss Bland-Hawthorn, Julia J. Bryant, Brent Groves, Sarah Brough, Christoph Federrath, Jon S. Lawrence, Nuria P. Lorente, Matt S. Owers, Samuel N. Richards, Ángel R. López-Sánchez, Sarah M. Sweet, Jesse van de SandeSam P. Vaughan

^*Corresponding author for this work

Australian Astronomical Optics

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Abstract

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 (σ_v_,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 σ_v_,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 σ_v_,z ∼80 km s⁻¹ for SFR 1M_⊙yr⁻¹. This is consistent with recent theoretical models that suggest a σ_v_,z floor driven by star formation feedback processes with an upturn in σ_v_,z at higher SFR driven by gravitational transport of gas through the disc.

Original language	English
Pages (from-to)	2265-2284
Number of pages	20
Journal	Monthly Notices of the Royal Astronomical Society
Volume	495
Issue number	2
DOIs	https://doi.org/10.1093/MNRAS/STAA1272
Publication status	Published - Jun 2020

Bibliographical note

This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society, Volume 495, Issue 2, June 2020, Pages 2265–2284, https://doi.org/10.1093/mnras/staa1272. Copyright 2020 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

Keywords

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

Access to Document

10.1093/MNRAS/STAA1272

Publisher version (open access)Final published version, 6.14 MBLicence: Other

Cite this

Varidel, M. R., Croom, S. M., Lewis, G. F., Fisher, D. B., Glazebrook, K., Catinella, B., Cortese, L., Krumholz, M. R., Bland-Hawthorn, J., Bryant, J. J., Groves, B., Brough, S., Federrath, C., Lawrence, J. S., Lorente, N. P., Owers, M. S., Richards, S. N., López-Sánchez, Á. R., Sweet, S. M., ... Vaughan, S. P. (2020). The SAMI galaxy survey: gas velocity dispersions in low-z star-forming galaxies and the drivers of turbulence. Monthly Notices of the Royal Astronomical Society, 495(2), 2265-2284. https://doi.org/10.1093/MNRAS/STAA1272

@article{ce087aa9d9654ae79aec3189a0dad289,

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

abstract = "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 1M⊙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.",

keywords = "Galaxies: disc, Methods: data analysis, Methods: statistical, Techniques: imaging spectroscopy",

author = "Varidel, {Mathew R.} and Croom, {Scott M.} and Lewis, {Geraint F.} and Fisher, {Deanne B.} and Karl Glazebrook and Barbara Catinella and Luca Cortese and Krumholz, {Mark R.} and Joss Bland-Hawthorn and Bryant, {Julia J.} and Brent Groves and Sarah Brough and Christoph Federrath and Lawrence, {Jon S.} and Lorente, {Nuria P.} and Owers, {Matt S.} and Richards, {Samuel N.} and L{\'o}pez-S{\'a}nchez, {{\'A}ngel R.} and Sweet, {Sarah M.} and {van de Sande}, Jesse and Vaughan, {Sam P.}",

note = "This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society, Volume 495, Issue 2, June 2020, Pages 2265–2284, https://doi.org/10.1093/mnras/staa1272. Copyright 2020 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. ",

year = "2020",

month = jun,

doi = "10.1093/MNRAS/STAA1272",

language = "English",

volume = "495",

pages = "2265--2284",

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

issn = "0035-8711",

publisher = "Oxford University Press",

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Varidel, MR, Croom, SM, Lewis, GF, Fisher, DB, Glazebrook, K, Catinella, B, Cortese, L, Krumholz, MR, Bland-Hawthorn, J, Bryant, JJ, Groves, B, Brough, S, Federrath, C, Lawrence, JS , Lorente, NP , Owers, MS, Richards, SN, López-Sánchez, ÁR, Sweet, SM, van de Sande, J & Vaughan, SP 2020, 'The SAMI galaxy survey: gas velocity dispersions in low-z star-forming galaxies and the drivers of turbulence', Monthly Notices of the Royal Astronomical Society, vol. 495, no. 2, pp. 2265-2284. https://doi.org/10.1093/MNRAS/STAA1272

TY - JOUR

T1 - The SAMI galaxy survey

T2 - gas velocity dispersions in low-z star-forming galaxies and the drivers of turbulence

AU - Varidel, Mathew R.

AU - Croom, Scott M.

AU - Lewis, Geraint F.

AU - Fisher, Deanne B.

AU - Glazebrook, Karl

AU - Catinella, Barbara

AU - Cortese, Luca

AU - Krumholz, Mark R.

AU - Bland-Hawthorn, Joss

AU - Bryant, Julia J.

AU - Groves, Brent

AU - Brough, Sarah

AU - Federrath, Christoph

AU - Lawrence, Jon S.

AU - Lorente, Nuria P.

AU - Owers, Matt S.

AU - Richards, Samuel N.

AU - López-Sánchez, Ángel R.

AU - Sweet, Sarah M.

AU - van de Sande, Jesse

AU - Vaughan, Sam P.

N1 - This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society, Volume 495, Issue 2, June 2020, Pages 2265–2284, https://doi.org/10.1093/mnras/staa1272. Copyright 2020 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

PY - 2020/6

Y1 - 2020/6

N2 - 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 1M⊙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.

AB - 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 1M⊙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.

KW - Galaxies: disc

KW - Methods: data analysis

KW - Methods: statistical

KW - Techniques: imaging spectroscopy

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UR - http://purl.org/au-research/grants/arc/FT140100255

U2 - 10.1093/MNRAS/STAA1272

DO - 10.1093/MNRAS/STAA1272

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SN - 0035-8711

VL - 495

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JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

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ER -

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

Abstract

Bibliographical note

Keywords

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The impact of impact: what stops star formation in cluster galaxies?

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

Abstract

Bibliographical note

Keywords

Access to Document

Other files and links

Fingerprint

Projects

The impact of impact: what stops star formation in cluster galaxies?

Cite this