Sussing merger trees: stability and convergence

doi:10.1093/mnras/stw726

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	Sussing merger trees: stability and convergence
	Wang, Yang 3,4,5,6; Pearce, Frazer R.4; Knebe, Alexander 7,8; Schneider, Aurel 9,10; Srisawat, Chaichalit 9; Tweed, Dylan 1,2; Jung, Intae 11; Han, Jiaxin 12; Helly, John 12; Onions, Julian 4
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2016-06-21
卷号	459 期号:2 页码:1554-1568
关键词	Methods: Numerical Galaxies: Haloes- Galaxies: Evolution Dark Matter
ISSN号	0035-8711
DOI	10.1093/mnras/stw726
英文摘要	Merger trees are routinely used to follow the growth and merging history of dark matter haloes and subhaloes in simulations of cosmic structure formation. Srisawat et al. compared a wide range of merger-tree-building codes. Here we test the influence of output strategies and mass resolution on tree-building. We find that, somewhat surprisingly, building the tree from more snapshots does not generally produce more complete trees; instead, it tends to shorten them. Significant improvements are seen for patching schemes that attempt to bridge over occasional dropouts in the underlying halo catalogues or schemes that combine the halo-finding and tree-building steps seamlessly. The adopted output strategy does not affect the average number of branches (bushiness) of the resultant merger trees. However, mass resolution has an influence on both main branch length and the bushiness. As the resolution increases, a halo with the same mass can be traced back further in time and will encounter more small progenitors during its evolutionary history. Given these results, we recommend that, for simulations intended as precursors for galaxy formation models where of the order of 100 or more snapshots are analysed, the tree-building routine should be integrated with the halo finder, or at the very least be able to patch over multiple adjacent snapshots.
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000377471200032
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/32793]
专题	中国科学院上海天文台
通讯作者	Wang, Yang
作者单位	1.Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel 2.Shanghai Jiao Tong Univ, Dept Phys, Ctr Astron & Astrophys, Shanghai 200240, Peoples R China 3.Sun Yat Sen Univ, Sch Phys & Astron, Guangzhou, Peoples R China 4.Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England 5.Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 6.Chinese Acad Sci, Grad Sch, 19A,Yuquan Rd, Beijing, Peoples R China 7.Univ Autonoma Madrid, Fac Ciencias, Dept Fis Teor, E-28049 Madrid, Spain 8.CSIC, UAM, Astro UAM, Unidad Asociada, Barcelona, Spain 9.Univ Sussex, Dept Phys & Astron, Brighton BN1 9QH, E Sussex, England 10.Univ Zurich, Inst Computat Sci, CH-8006 Zurich, Switzerland
推荐引用方式 GB/T 7714	Wang, Yang,Pearce, Frazer R.,Knebe, Alexander,et al. Sussing merger trees: stability and convergence[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,459(2):1554-1568.
APA	Wang, Yang.,Pearce, Frazer R..,Knebe, Alexander.,Schneider, Aurel.,Srisawat, Chaichalit.,...&Lin, Weipeng.(2016).Sussing merger trees: stability and convergence.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,459(2),1554-1568.
MLA	Wang, Yang,et al."Sussing merger trees: stability and convergence".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 459.2(2016):1554-1568.