CAJ | 학술논문

基于N体数值模拟技术，给出在各种宇宙学模型框架下，产生LAMOST红移巡天的模拟样本的方法. 在模拟样本构造中，采用双参数的Lagrange偏袒模型，并结合LAMOST的设计，考虑了径向选择效应及巡天几何的限制；同时还根据星系形态和环境的关系，进一步对模拟样本的星系形态进行分类. 选择APM的亮星系样本对模型进行检验，并通过计算其角相关函数和模型进行比较. 计算结果表明，对包括所有形态的星系样本，模拟样本给出了和观测相符的结果，而对基于Postman和Geller的形态环境关系所得到的不同形态的模拟星系分布，模拟样本中的椭圆星系和透镜星系不足以解释APM亮星系样本中的成团强度，即强偏袒效应. 最后，从实测角度出发，对采用的模拟方法和样本进行评估.
기우N체수치모의기술，급출재각충우주학모형광가하，산생LAMOST홍이순천적모의양본적방법. 재모의양본구조중，채용쌍삼수적Lagrange편단모형，병결합LAMOST적설계，고필료경향선택효응급순천궤하적한제；동시환근거성계형태화배경적관계，진일보대모의양본적성계형태진행분류. 선택APM적량성계양본대모형진행검험，병통과계산기각상관함수화모형진행비교. 계산결과표명，대포괄소유형태적성계양본，모의양본급출료화관측상부적결과，이대기우Postman화Geller적형태배경관계소득도적불동형태적모의성계분포，모의양본중적타원성계화투경성계불족이해석APM량성계양본중적성단강도，즉강편단효응. 최후，종실측각도출발，대채용적모의방법화양본진행평고.
For a wide range of cold dark matter models of galaxy formation, we present a general method for constructing mock LAMOST galaxy redshift surveys using cosmological N-body simulation. We use the two-parameter Lagrangian biased model for the construction, take into account the radial selection and survey geometry and use a local model for the construction, take into account the radial selection and survey geometry and use a local morphology-density relation to assign morphological types to the galaxies. We test the mock samples by com-paring their angular correlation functions both for the whole catalogue and for different morphological types with those of the APM bright galaxy catalogue. The result shows an excellent agreement between the mock catalogue as a whole and the observations; but the E/S0 galaxies of the mock sample are unable to reproduce the overall amplitude of the ob-served correlation. The mock catalogue should be useful when designing redshift surveeys and provide a valuable aid in developing new statistical estimators and algorithm for quantifying the large scale structure of the universe.