Galaxies going MAD: the Galaxy-Finder Comparison Project

	Galaxies going MAD: the Galaxy-Finder Comparison Project
	Knebe, Alexander 1; Libeskind, Noam I.2; Pearce, Frazer 3; Behroozi, Peter 4,5,6; Casado, Javier 1; Dolag, Klaus 7,8; Dominguez-Tenreiro, Rosa 1; Elahi, Pascal 9; Lux, Hanni 3; Muldrew, Stuart I.3
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2013
卷号	428 期号:3 页码:2039-2052
关键词	galaxies: evolution galaxies: haloes cosmology: theory dark matter
英文摘要	With the ever-increasing size and complexity of fully self-consistent simulations of galaxy formation within the framework of the cosmic web, the demands upon object finders for these simulations have simultaneously grown. To this extent we initiated the Halo-Finder Comparison Project that gathered together all the experts in the field and has so far led to two comparison papers, one for dark matter field haloes, and one for dark matter subhaloes. However, as state-of-the-art simulation codes are perfectly capable of not only following the formation and evolution of dark matter but also accounting for baryonic physics, i.e. gas hydrodynamics, star formation, stellar feedback, etc., object finders should also be capable of taking these additional physical processes into consideration. Here we report - for the first time - on a comparison of codes as applied to the Constrained Local UniversE Simulation (CLUES) of the formation of the Local Group which incorporates much of the physics relevant for galaxy formation. We compare both the properties of the three main galaxies in the simulation (representing the Milky Way, Andromeda and M33) and their satellite populations for a variety of halo finders ranging from phase space to velocity space to spherical overdensity based codes, including also a mere baryonic object finder. We obtain agreement amongst codes comparable to (if not better than) our previous comparisons - at least for the total, dark and stellar components of the objects. However, the diffuse gas content of the haloes shows great disparity, especially for low-mass satellite galaxies. This is primarily due to differences in the treatment of the thermal energy during the unbinding procedure. We acknowledge that the handling of gas in halo finders is something that needs to be dealt with carefully, and the precise treatment may depend sensitively upon the scientific problem being studied.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	CDM HYDRODYNAMICAL SIMULATIONS ; MILKY-WAY SATELLITES ; DARK-MATTER HALO ; LOCAL GROUP ; RADIAL-DISTRIBUTION ; LAMBDA-CDM ; COSMOLOGICAL SIMULATIONS ; LUMINOSITY FUNCTION ; BARYONIC MODELS ; GALACTIC HALOS
收录类别	SCI
语种	英语
WOS记录号	WOS:000318230700015
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/18014]
专题	上海天文台_星系宇宙学重点实验室
作者单位	1.Univ Autonoma Madrid, Fac Ciencias, Dept Fis Teor, E-28049 Madrid, Spain 2.Leibniz Inst Astrophys, D-14482 Potsdam, Germany 3.Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England 4.Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94309 USA 5.Stanford Univ, Dept Phys, Stanford, CA 94305 USA 6.SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA 7.Max Planck Inst Astrophys, D-85741 Garching, Germany 8.Univ Observ Munchen, D-81679 Munich, Germany 9.Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
推荐引用方式 GB/T 7714	Knebe, Alexander,Libeskind, Noam I.,Pearce, Frazer,et al. Galaxies going MAD: the Galaxy-Finder Comparison Project[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2013,428(3):2039-2052.
APA	Knebe, Alexander.,Libeskind, Noam I..,Pearce, Frazer.,Behroozi, Peter.,Casado, Javier.,...&Onions, Julian.(2013).Galaxies going MAD: the Galaxy-Finder Comparison Project.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,428(3),2039-2052.
MLA	Knebe, Alexander,et al."Galaxies going MAD: the Galaxy-Finder Comparison Project".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 428.3(2013):2039-2052.