What drives the evolution of gas kinematics in star-forming galaxies?
What drives the evolution of gas kinematics in star-forming galaxies?
复制标题
是什么推动了恒星形成星系中气体运动学的演化?
DOI:
10.1093/mnras/sty2970
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发表时间:
2018
影响因子:
4.8
通讯作者:
Wetzel, Andrew
中科院分区:
文献类型:
--
作者:
Hung, Chao-Ling;Hayward, Christopher C;Yuan, Tiantian;Boylan-Kolchin, Michael;Faucher-Giguère, Claude-André;Hopkins, Philip F;Kereš, Dušan;Murray, Norman;Wetzel, Andrew
One important result from recent large integral field spectrograph (IFS) surveys is that the intrinsic velocity dispersion of galaxies traced by star-forming gas increases with redshift. Massive, rotation-dominated discs are already in place at∼ 2, but they are dynamically hotter than spiral galaxies in the local Universe. Although several plausible mechanisms for this elevated velocity dispersion (e.g. star formation feedback, elevated gas supply, or more frequent galaxy interactions) have been proposed, the fundamental driver of the velocity dispersion enhancement at high redshift remains unclear. We investigate the origin of this kinematic evolution using a suite of cosmological simulations from the FIRE (Feedback In Realistic Environments) project. Although IFS surveys generally cover a wider range of stellar masses than in these simulations, the simulated galaxies show trends between intrinsic velocity dispersion (σintr), SFR, andin agreement with observations. In both observations and simulations, galaxies on the star-forming main sequence have median σintrvalues that increase from∼ 0 to∼ 1–1.5, but this increasing trend is less evident at higher redshift. In the FIRE simulations, σintrcan vary significantly on time-scales ofMyr. These variations closely mirror the time evolution of the SFR and gas inflow rate (). By cross-correlating pairs of σintr, $\skew4\dot{M}_{\rm gas}$, and SFR, we show that increased gas inflow leads to subsequent enhanced star formation, and enhancements in σintrtend to temporally coincide with increases inand SFR.
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DOI:
10.1088/0004-637x/724/2/1373
发表时间:
2010-09
期刊:
The Astrophysical Journal
影响因子:
--
作者:
T. Gonçalves;A. Basu-Zych;R. Overzier;D. C. Martin;D. Law;D. Schiminovich;T. Wyder;Ryan Mallery;R. Rich;T. Heckman
通讯作者:
T. Gonçalves;A. Basu-Zych;R. Overzier;D. C. Martin;D. Law;D. Schiminovich;T. Wyder;Ryan Mallery;R. Rich;T. Heckman
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
M. Krumholz;A. Burkert
通讯作者:
A. Burkert
DOI:
10.1088/0004-637x/799/2/209
发表时间:
2014-09
期刊:
The Astrophysical Journal
影响因子:
--
作者:
E. Wisnioski;N. F. Schreiber;S. Wuyts;E. Wuyts;K. Bandara;D. Wilman;R. Genzel;R. Bender;R. Da
通讯作者:
E. Wisnioski;N. F. Schreiber;S. Wuyts;E. Wuyts;K. Bandara;D. Wilman;R. Genzel;R. Bender;R. Da
影响因子:
4.8
作者:
O. Turner;M. Cirasuolo;C. Harrison;R. McLure;J. Dunlop;A. M. Swinbank;H. Johnson;D. Sobral;
通讯作者:
O. Turner;M. Cirasuolo;C. Harrison;R. McLure;J. Dunlop;A. M. Swinbank;H. Johnson;D. Sobral;
DOI:
10.1088/0004-637x/773/2/88
发表时间:
2013-06
期刊:
The Astrophysical Journal
影响因子:
--
作者:
A. Stilp;J. Dalcanton;E. Skillman;S. Warren;J. Ott;B. Koribalski
通讯作者:
A. Stilp;J. Dalcanton;E. Skillman;S. Warren;J. Ott;B. Koribalski