Fast simulations for intensity mapping experiments

被引：56
作者：
Alonso, David [1 ]
Ferreira, Pedro G. [1 ]
Santos, Mario G. [2 ,3 ,4 ]
机构：
[1] Univ Oxford, Dept Phys, Subdept Astrophys, DWB, Oxford OX1 3RH, England
[2] Univ Western Cape, Dept Phys, ZA-7535 Cape Town, South Africa
[3] SKA SA, ZA-7405 Pinelands, South Africa
[4] Univ Lisbon, Inst Super Tecn, CENTRA, P-1049001 Lisbon, Portugal
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2014年 / 444卷 / 04期
基金：
新加坡国家研究基金会;
关键词：
large-scale structure of Universe; radio lines: galaxies; BARYON ACOUSTIC-OSCILLATIONS; SYNOPTIC SURVEY TELESCOPE; PROBE WMAP OBSERVATIONS; GALAXY REDSHIFT SURVEY; DARK ENERGY; H-I; FOREGROUND SUBTRACTION; SPECTROSCOPIC SURVEY; 21-CM EMISSION; HALO-MODEL;
D O I：
10.1093/mnras/stu1666
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present a code to generate mock observations of 21 cm intensity mapping experiments. The emphasis of the code is on reducing the computational cost of running a full-blown simulation, trading computational time for accuracy. The code can be used to generate independent realizations of the cosmological signal and foregrounds, which are necessary, for instance, in order to obtain realistic forecasts for future intensity mapping experiments. The code is able to reproduce the correct angular and radial clustering pattern for the cosmological signal, including redshift-space distortions, lightcone evolution and bias. Furthermore, it is possible to simulate a variety of foregrounds, including the potentially problematic polarized synchrotron emission.
引用
收藏
页码：3183 / 3197
页数：15
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