论文标题
对快速望远镜手工艺的预测超半年型HI调查
Predictions for the FAST telescope's CRAFTS Extra-Galactic HI Survey
论文作者
论文摘要
五百米的光圈球形射电望远镜（FAST）已开始了Consensal Radio天文学快速调查（Crafts）。在本文中，我们使用从调试观测值中得出的快速得出的技术参数来模拟用于手工艺外的静脉外HI调查的完整性功能，选择了两种模拟目录中的HI星系。一个是由蒙特卡洛模拟生成的，该模拟基于苜蓿$ 100 \％$（又称$α$ .100）目录的插值质量宽度宽度函数。另一个由基于$λ$ CDM模型的半分析N体模拟构建。我们的结果表明，一项两次及两次婚外时期的调查将能够检测到近4.8 \ times10^{5} $星系，从中可以将Hi Mass功能的“微弱端”斜率恢复到$ \ MATHRM {10^{7} {7} \，M _ {\ odot andss $ mass and'''''''''''''''''' 0.1。考虑到射频干扰状态和敏感性限制，工艺品将有效地检测低于0.1的红移HI星系，这意味着在探索不同环境中的星系相互作用以及当地宇宙中HI星系的空间分布方面具有巨大的潜力。
The Five-hundred-meter Aperture Spherical radio Telescope (FAST) has started the Commensal Radio Astronomy FasT Survey (CRAFTS). In this paper, we use the technical parameters of FAST derived from commissioning observations to simulate the completeness function for extragalactic HI survey of CRAFTS, HI galaxies from two kinds of mock catalogues are selected. One is generated by Monte-Carlo simulation based on the interpolated mass-velocity width function of the ALFALFA $100\%$ (a.k.a. $α$ .100) catalogue. The other is constructed by semi-analytical N-body simulation based on the $Λ$CDM model. Our results suggest that a two-pass extragalactic HI survey will be able to detect nearly $4.8\times10^{5}$ galaxies, from which the 'faint end' slope of the HI Mass Function (HIMF) can be recovered to $\mathrm{10^{7}\, M_{\odot}}$ and the 'knee mass' of the HIMF can be measured to a redshift of 0.1. Considering the radio frequency interference status and sensitivity limitation, CRAFTS will be efficient in detecting HI galaxies at redshifts below 0.1, which implies a tremendous potential in exploring the galaxy interactions in different environments and the spatial distribution of HI galaxies in the local universe.
