The SAMI Galaxy Survey: impact of star formation and AGN feedback processes on the ionized gas velocity dispersion

Sree Oh; Matthew Colless; Stefania Barsanti; Henry R. M. Zovaro; Scott M. Croom; Sukyoung K. Yi; Andrei Ristea; Jesse van de Sande; Francesco D’Eugenio; Joss Bland-Hawthorn; Julia J. Bryant; Sarah Casura; Hyunjin Jeong; Sarah M. Sweet; Tayyaba Zafar

doi:10.1093/mnras/stae1382

The SAMI Galaxy Survey: impact of star formation and AGN feedback processes on the ionized gas velocity dispersion

Sree Oh^*, Matthew Colless, Stefania Barsanti, Henry R. M. Zovaro, Scott M. Croom, Sukyoung K. Yi, Andrei Ristea, Jesse van de Sande, Francesco D’Eugenio, Joss Bland-Hawthorn, Julia J. Bryant, Sarah Casura, Hyunjin Jeong, Sarah M. Sweet, Tayyaba Zafar

^*Corresponding author for this work

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Abstract

We investigate the influence of star formation and instantaneous active galactic nuclei (AGN) feedback processes on the ionized gas velocity dispersion in a sample of 1285 emission-line galaxies with stellar masses log (M_∗/M_☉) ≥ 9 from the integral-field spectroscopy Sydney-AAO Multi-object Integral-field Galaxy Survey. We fit both narrow- and broad-emission-line components using aperture spectra integrated within one effective radius, while ensuring the elimination of velocity differences between the spectra of individual spaxels. Our analysis reveals that 386 (30 per cent) galaxies can be adequately described using a single-emission component while 356 (28 per cent) galaxies require two (broad and narrow) components. Galaxies characterized by high-mass, elevated star formation rate surface density, or type-2 AGN-like emissions tend to feature an additional broad-emission-line component, leading to their classification as double-component galaxies. We explore the correlations between M_∗ and gas velocity dispersions, highlighting that the prominence of the broad component significantly contributes to elevating the gas velocity dispersion. Galaxies displaying AGN-like emission based on optical definitions show enhanced gas velocity dispersions. In star-forming galaxies, both stellar mass and star-formation rate surface density substantially contribute to the velocity dispersion of the narrow component. Increased star-forming activity appears to elevate the velocity dispersion of the narrow component. The broad component exhibits a weaker dependence on stellar mass and is primarily driven by galactic outflows. We suggest that strong star-forming activity leads to the formation of a broad-emission-line component, but the impact on inflating gas velocity dispersion is moderate. On the other hand, AGN-driven outflows appear to be a more important contributor to the elevated velocity dispersion of the ionized gas.

Original language	English
Pages (from-to)	4017-4032
Number of pages	16
Journal	Monthly Notices of the Royal Astronomical Society
Volume	531
Issue number	4
DOIs	https://doi.org/10.1093/mnras/stae1382
Publication status	Published - 1 Jul 2024

Bibliographical note

Copyright © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

galaxies: active
galaxies: evolution
galaxies: fundamental parameters
galaxies: kinematics and dynamics
galaxies: starburst
galaxies: structure

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10.1093/mnras/stae1382Licence: CC BY

Publisher version (open access)Final published version, 2.71 MBLicence: CC BY

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Oh, S., Colless, M., Barsanti, S., Zovaro, H. R. M., Croom, S. M., Yi, S. K., Ristea, A., van de Sande, J., D’Eugenio, F., Bland-Hawthorn, J., Bryant, J. J., Casura, S., Jeong, H., Sweet, S. M., & Zafar, T. (2024). The SAMI Galaxy Survey: impact of star formation and AGN feedback processes on the ionized gas velocity dispersion. Monthly Notices of the Royal Astronomical Society, 531(4), 4017-4032. https://doi.org/10.1093/mnras/stae1382

@article{c5384e04908c4078ba44c52d16791acb,

title = "The SAMI Galaxy Survey: impact of star formation and AGN feedback processes on the ionized gas velocity dispersion",

abstract = "We investigate the influence of star formation and instantaneous active galactic nuclei (AGN) feedback processes on the ionized gas velocity dispersion in a sample of 1285 emission-line galaxies with stellar masses log (M∗/M☉) ≥ 9 from the integral-field spectroscopy Sydney-AAO Multi-object Integral-field Galaxy Survey. We fit both narrow- and broad-emission-line components using aperture spectra integrated within one effective radius, while ensuring the elimination of velocity differences between the spectra of individual spaxels. Our analysis reveals that 386 (30 per cent) galaxies can be adequately described using a single-emission component while 356 (28 per cent) galaxies require two (broad and narrow) components. Galaxies characterized by high-mass, elevated star formation rate surface density, or type-2 AGN-like emissions tend to feature an additional broad-emission-line component, leading to their classification as double-component galaxies. We explore the correlations between M∗ and gas velocity dispersions, highlighting that the prominence of the broad component significantly contributes to elevating the gas velocity dispersion. Galaxies displaying AGN-like emission based on optical definitions show enhanced gas velocity dispersions. In star-forming galaxies, both stellar mass and star-formation rate surface density substantially contribute to the velocity dispersion of the narrow component. Increased star-forming activity appears to elevate the velocity dispersion of the narrow component. The broad component exhibits a weaker dependence on stellar mass and is primarily driven by galactic outflows. We suggest that strong star-forming activity leads to the formation of a broad-emission-line component, but the impact on inflating gas velocity dispersion is moderate. On the other hand, AGN-driven outflows appear to be a more important contributor to the elevated velocity dispersion of the ionized gas.",

keywords = "galaxies: active, galaxies: evolution, galaxies: fundamental parameters, galaxies: kinematics and dynamics, galaxies: starburst, galaxies: structure",

author = "Sree Oh and Matthew Colless and Stefania Barsanti and Zovaro, {Henry R. M.} and Croom, {Scott M.} and Yi, {Sukyoung K.} and Andrei Ristea and {van de Sande}, Jesse and Francesco D{\textquoteright}Eugenio and Joss Bland-Hawthorn and Bryant, {Julia J.} and Sarah Casura and Hyunjin Jeong and Sweet, {Sarah M.} and Tayyaba Zafar",

note = "Copyright {\textcopyright} 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher. ",

year = "2024",

month = jul,

day = "1",

doi = "10.1093/mnras/stae1382",

language = "English",

volume = "531",

pages = "4017--4032",

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

issn = "0035-8711",

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Oh, S, Colless, M, Barsanti, S, Zovaro, HRM, Croom, SM, Yi, SK, Ristea, A, van de Sande, J, D’Eugenio, F, Bland-Hawthorn, J, Bryant, JJ, Casura, S, Jeong, H, Sweet, SM & Zafar, T 2024, 'The SAMI Galaxy Survey: impact of star formation and AGN feedback processes on the ionized gas velocity dispersion', Monthly Notices of the Royal Astronomical Society, vol. 531, no. 4, pp. 4017-4032. https://doi.org/10.1093/mnras/stae1382

TY - JOUR

T1 - The SAMI Galaxy Survey

T2 - impact of star formation and AGN feedback processes on the ionized gas velocity dispersion

AU - Oh, Sree

AU - Colless, Matthew

AU - Barsanti, Stefania

AU - Zovaro, Henry R. M.

AU - Croom, Scott M.

AU - Yi, Sukyoung K.

AU - Ristea, Andrei

AU - van de Sande, Jesse

AU - D’Eugenio, Francesco

AU - Bland-Hawthorn, Joss

AU - Bryant, Julia J.

AU - Casura, Sarah

AU - Jeong, Hyunjin

AU - Sweet, Sarah M.

AU - Zafar, Tayyaba

N1 - Copyright © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

PY - 2024/7/1

Y1 - 2024/7/1

N2 - We investigate the influence of star formation and instantaneous active galactic nuclei (AGN) feedback processes on the ionized gas velocity dispersion in a sample of 1285 emission-line galaxies with stellar masses log (M∗/M☉) ≥ 9 from the integral-field spectroscopy Sydney-AAO Multi-object Integral-field Galaxy Survey. We fit both narrow- and broad-emission-line components using aperture spectra integrated within one effective radius, while ensuring the elimination of velocity differences between the spectra of individual spaxels. Our analysis reveals that 386 (30 per cent) galaxies can be adequately described using a single-emission component while 356 (28 per cent) galaxies require two (broad and narrow) components. Galaxies characterized by high-mass, elevated star formation rate surface density, or type-2 AGN-like emissions tend to feature an additional broad-emission-line component, leading to their classification as double-component galaxies. We explore the correlations between M∗ and gas velocity dispersions, highlighting that the prominence of the broad component significantly contributes to elevating the gas velocity dispersion. Galaxies displaying AGN-like emission based on optical definitions show enhanced gas velocity dispersions. In star-forming galaxies, both stellar mass and star-formation rate surface density substantially contribute to the velocity dispersion of the narrow component. Increased star-forming activity appears to elevate the velocity dispersion of the narrow component. The broad component exhibits a weaker dependence on stellar mass and is primarily driven by galactic outflows. We suggest that strong star-forming activity leads to the formation of a broad-emission-line component, but the impact on inflating gas velocity dispersion is moderate. On the other hand, AGN-driven outflows appear to be a more important contributor to the elevated velocity dispersion of the ionized gas.

AB - We investigate the influence of star formation and instantaneous active galactic nuclei (AGN) feedback processes on the ionized gas velocity dispersion in a sample of 1285 emission-line galaxies with stellar masses log (M∗/M☉) ≥ 9 from the integral-field spectroscopy Sydney-AAO Multi-object Integral-field Galaxy Survey. We fit both narrow- and broad-emission-line components using aperture spectra integrated within one effective radius, while ensuring the elimination of velocity differences between the spectra of individual spaxels. Our analysis reveals that 386 (30 per cent) galaxies can be adequately described using a single-emission component while 356 (28 per cent) galaxies require two (broad and narrow) components. Galaxies characterized by high-mass, elevated star formation rate surface density, or type-2 AGN-like emissions tend to feature an additional broad-emission-line component, leading to their classification as double-component galaxies. We explore the correlations between M∗ and gas velocity dispersions, highlighting that the prominence of the broad component significantly contributes to elevating the gas velocity dispersion. Galaxies displaying AGN-like emission based on optical definitions show enhanced gas velocity dispersions. In star-forming galaxies, both stellar mass and star-formation rate surface density substantially contribute to the velocity dispersion of the narrow component. Increased star-forming activity appears to elevate the velocity dispersion of the narrow component. The broad component exhibits a weaker dependence on stellar mass and is primarily driven by galactic outflows. We suggest that strong star-forming activity leads to the formation of a broad-emission-line component, but the impact on inflating gas velocity dispersion is moderate. On the other hand, AGN-driven outflows appear to be a more important contributor to the elevated velocity dispersion of the ionized gas.

KW - galaxies: active

KW - galaxies: evolution

KW - galaxies: fundamental parameters

KW - galaxies: kinematics and dynamics

KW - galaxies: starburst

KW - galaxies: structure

UR - http://www.scopus.com/inward/record.url?scp=85196504097&partnerID=8YFLogxK

UR - http://purl.org/au-research/grants/arc/CE170100013

U2 - 10.1093/mnras/stae1382

DO - 10.1093/mnras/stae1382

M3 - Article

AN - SCOPUS:85196504097

SN - 0035-8711

VL - 531

SP - 4017

EP - 4032

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

The SAMI Galaxy Survey: impact of star formation and AGN feedback processes on the ionized gas velocity dispersion

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