Galactic inflow and wind recycling rates in the eagle simulations
Galactic inflow and wind recycling rates in the eagle simulations
复制标题
鹰模拟中的银河流入和风循环率
DOI：
--
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发表时间：
2020
影响因子：
4.8
通讯作者：
R. Bower
中科院分区：
文献类型：
--
作者：
P. Mitchell;J. Schaye;R. Bower
星系风循环的作用是星系演化中最大的未知数之一，因为循环对星系生长的任何贡献在很大程度上都随着第一次下落物质的流入率以及流出的气体和金属被赶出星系的速度而退化。我们目前的测量风回收的效率从鹰宇宙模拟项目，利用大容量模拟，再现一个现实的星系人口的统计能力。我们研究风循环在晕尺度，即气体已超过晕维里半径喷射，并在星系尺度，即气体已从星际介质喷射到至少$\approximat 10 \，{{\rm %}}$的维里半径。银河系尺度的风循环通常是低效的，其特征返回时间尺度与哈勃时间相当或更长，并且效率在特征晕质量$M_{200} = 10^{12} \，\mathrm{M_\odot }$处明显达到峰值。相应地，鹰星系中的大多数气体都是第一次被吸积。回收是更有效的晕尺度，与半分析星系形成模型所假设的数量级不同的值。风力循环与其他流体动力学模拟的效率差异目前难以评估，但可能较小。我们发现，在维里半径的累积第一次气体吸积率相对于质量为$M_{200} \lt 10^{12} \，\mathrm{M_\odot }$的晕的暗物质吸积的预期降低，表明有效的预防性反馈晕尺度。
The role of galactic wind recycling represents one of the largest unknowns in galaxy evolution, as any contribution of recycling to galaxy growth is largely degenerate with the inflow rates of first-time infalling material, and the rates with which outflowing gas and metals are driven from galaxies. We present measurements of the efficiency of wind recycling from the eagle cosmological simulation project, leveraging the statistical power of large-volume simulations that reproduce a realistic galaxy population. We study wind recycling at the halo scale, i.e. gas that has been ejected beyond the halo virial radius, and at the galaxy scale, i.e. gas that has been ejected from the interstellar medium to at least $\approx 10 \, {{\ \rm per\ cent}}$ of the virial radius. Galaxy-scale wind recycling is generally inefficient, with a characteristic return time-scale that is comparable to or longer than a Hubble time, and with an efficiency that clearly peaks at the characteristic halo mass of $M_{200} = 10^{12} \, \mathrm{M_\odot }$. Correspondingly, the majority of gas being accreted on to galaxies in eagle is infalling for the first time. Recycling is more efficient at the halo scale, with values that differ by orders of magnitude from those assumed by semi-analytical galaxy formation models. Differences in the efficiency of wind recycling with other hydrodynamical simulations are currently difficult to assess, but are likely smaller. We find that cumulative first-time gas accretion rates at the virial radius are reduced relative to the expectation from dark matter accretion for haloes with mass $M_{200} \lt 10^{12} \, \mathrm{M_\odot }$, indicating efficient preventative feedback on halo scales.
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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
银河系气体从光环流向盘：银河系盘-光环界面的层析成像和运动学
DOI：
10.3847/1538-4357/ab3414
发表时间：
2019
期刊：
The Astrophysical Journal
影响因子：
--
作者：
Bish, Hannah V.;Werk, Jessica K.;Prochaska, J. Xavier;Rubin, Kate H.;Zheng, Yong;O’Meara, John M.;Deason, Alis J.
通讯作者：
Deason, Alis J.
影响因子：
4.8
作者：
Zachary Hafen;C. Faucher-Giguère;D. Anglés-Alcázar;J. Stern;D. Keres̆;C. Hummels;C. Esmerian;S. Garrison-Kimmel;K. El-Badry;A. Wetzel;T. K. Chan;P. Hopkins;N. Murray
通讯作者：
Zachary Hafen;C. Faucher-Giguère;D. Anglés-Alcázar;J. Stern;D. Keres̆;C. Hummels;C. Esmerian;S. Garrison-Kimmel;K. El-Badry;A. Wetzel;T. K. Chan;P. Hopkins;N. Murray
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