Galactic outflow rates in the EAGLE simulations
Galactic outflow rates in the EAGLE simulations
复制标题
EAGLE 模拟中的银河流出率
DOI:
10.1093/mnras/staa938
复制
发表时间:
2019
影响因子:
4.8
通讯作者:
R. Crain
中科院分区:
文献类型:
--
作者:
P. Mitchell;J. Schaye;R. Bower;R. Crain
We present measurements of galactic outflow rates from the eagle suite of cosmological simulations. We find that gas is removed from the interstellar medium (ISM) of central galaxies with a dimensionless mass loading factor that scales approximately with circular velocity as $V_{\mathrm{c}}^{-3/2}$ in the low-mass regime where stellar feedback dominates. Feedback from active galactic nuclei causes an upturn in the mass loading for halo masses ${\gt}10^{12} \, \mathrm{M_\odot }$. We find that more gas outflows through the halo virial radius than is removed from the ISM of galaxies, particularly at low redshifts, implying substantial mass loading within the circumgalactic medium. Outflow velocities span a wide range at a given halo mass/redshift, and on average increase positively with redshift and halo mass up to $M_{200} \sim 10^{12} \, \mathrm{M_\odot }$. Outflows exhibit a bimodal flow pattern on circumgalactic scales, aligned with the galactic minor axis. We present a number of like-for-like comparisons to outflow rates from other recent cosmological hydrodynamical simulations, and show that comparing the propagation of galactic winds as a function of radius reveals substantial discrepancies between different models. Relative to some other simulations, eagle favours a scenario for stellar feedback where agreement with the galaxy stellar mass function is achieved by removing smaller amounts of gas from the ISM, but with galactic winds that then propagate and entrain ambient gas out to larger radii.
登录
查看更多内容
DOI:
10.1111/j.1365-2966.2009.15034.x
发表时间:
2008-08
影响因子:
4.8
作者:
K. Dolag;S. Borgani;S. Borgani;S. Borgani;G. Murante;V. Springel
通讯作者:
K. Dolag;S. Borgani;S. Borgani;S. Borgani;G. Murante;V. Springel
影响因子:
4.8
作者:
S. Walch;T. Naab
通讯作者:
S. Walch;T. Naab
影响因子:
4.8
作者:
R. Dav'e;D. Anglés-Alcázar;D. Narayanan;Qi Li;M. Rafieferantsoa;S. Appleby
通讯作者:
R. Dav'e;D. Anglés-Alcázar;D. Narayanan;Qi Li;M. Rafieferantsoa;S. Appleby
DOI:
10.3847/1538-4357/ab378f
发表时间:
2018-11
期刊:
The Astrophysical Journal
影响因子:
--
作者:
C. Hummels;Britton D. Smith;P. Hopkins;B. O’Shea;Devin W. Silvia;J. Werk;N. Lehner;J. Wise;D. Collins;Iryna S. Butsky
通讯作者:
C. Hummels;Britton D. Smith;P. Hopkins;B. O’Shea;Devin W. Silvia;J. Werk;N. Lehner;J. Wise;D. Collins;Iryna S. Butsky