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

被引：0

作者：

Oh, Sree ^{[1
,2
,3
,4
,14
]}

Colless, Matthew ^{[3
,4
,14
]}

Barsanti, Stefania ^{[3
,4
,14
]}

Zovaro, Henry R. M. ^{[3
,4
,14
]}

Croom, Scott M. ^{[4
,5
,14
]}

Yi, Sukyoung K. ^{[1
,2
,14
]}

Ristea, Andrei ^{[4
,6
,14
]}

van de Sande, Jesse ^{[4
,5
,7
,14
]}

D'Eugenio, Francesco ^{[8
,9
,14
]}

Bland-Hawthorn, Joss ^{[4
,5
,14
]}

Bryant, Julia J. ^{[4
,5
,14
]}

Casura, Sarah ^{[10
,14
]}

Jeong, Hyunjin ^{[11
,14
]}

Sweet, Sarah M. ^{[4
,12
,14
]}

Zafar, Tayyaba ^{[13
,14
]}

机构：

[1] Yonsei Univ, Dept Astron, Seoul 03722, South Korea

[2] Yonsei Univ, Yonsei Univ Observ, Seoul 03722, South Korea

[3] Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia

[4] ARC Ctr Excellence All Sky Astrophys 3 Dimens ASTR, Canberra, Australia

[5] Univ Sydney, Sydney Inst Astron SIfA, Sch Phys, Sydney, NSW 2006, Australia

[6] Univ Western Australia, Int Ctr Radio Astron Res, 35 Stirling Highway, Crawley, WA 6009, Australia

[7] Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia

[8] Univ Cambridge, Cavendish Lab, Madingley Rise, Cambridge CB3 0HA, England

[9] Univ Cambridge, Kavli Inst Cosmol, Madingley Rise, Cambridge CB3 0HA, England

[10] Univ Hamburg, Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg, Germany

[11] Korea Astron & Space Sci Inst, Daejeon 305348, South Korea

[12] Univ Queensland, Sch Math & Phys, Brisbane, Qld 4072, Australia

[13] Macquarie Univ, Sch Math & Phys Sci, Sydney, NSW 2109, Australia

[14] Macquarie Univ, Astrophys & Space Technol Res Ctr, Sydney, NSW 2109, Australia

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2024年 / 531卷 / 04期

基金：

澳大利亚研究理事会; 新加坡国家研究基金会;

关键词：

galaxies: active; galaxies: evolution; galaxies: fundamental parameters; galaxies: kinematics and dynamics; galaxies: structure; galaxies: starburst; ACTIVE GALACTIC NUCLEI; SDSS-IV MANGA; INTEGRAL-FIELD SPECTROSCOPY; STELLAR POPULATION; FORMING GALAXIES; PHYSICAL CONDITIONS; DRIVEN TURBULENCE; SCALING RELATIONS; EMISSION-LINES; HOST GALAXIES;

D O I：

10.1093/mnras/stae1382

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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-circle dot) >= 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.

引用

页码：4017 / 4032

页数：16

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