Sussing Merger Trees: The Merger Trees Comparison Project
نویسندگان
چکیده
منابع مشابه
Dynamical consequences of CDM merger trees
Within the standard structure formation scenario, galaxies form as the result of an extended merger process. The first structures to form are small bound objects occurring at z ∼ 10, which then merge repeatedly to form increasingly larger objects. In this context, elliptical galaxies are generally seen as the result of a major merger of spiral systems. Through extensive SPH simulations of mergi...
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We present a new Monte-Carlo algorithm to generate merger trees describing the formation history of dark matter halos. The algorithm is a modification of the algorithm of Cole et al. (2000) used in the GALFORM semi-analytic galaxy formation model. As such, it is based on the Extended Press-Schechter theory and so should be applicable to hierarchical models with a wide range of power spectra and...
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Gravitationally bound dark matter haloes are biased tracers of the underlying dark matter distribution. I summarize a model in which the problem of describing the spatial distribution of haloes at any given time is closely related to the problem of describing the way in which dark matter haloes are assembled from smaller haloes which formed at earlier times. In the model, if not all haloes form...
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We present a new method for calculating the merger history of matter halos in hierarchical clustering cosmologies. The linear density field is smoothed on a range of scales, these are then ordered in decreasing density and a merger tree constructed. The method is similar in many respects to the block model of Cole & Kaiser but has a number of advantages: (i) it retains information about the spa...
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We introduce the contour process to describe the geometrical properties of merger trees. The contour process produces a one-dimensional object, the contour walk, which is a translation of the merger tree. We portray the contour walk through its length and action. The length is proportional to to the number of progenitors in the tree, and the action can be interpreted as a proxy of the mean leng...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2013
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/stt1545