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HI Gas in Disk and Dwarf Galaxies in the Semi-analytic Models of Galaxy Formation
Fu, Jian; Wang, Jing; Luo, Yu
2016
发表期刊FROM INTERSTELLAR CLOUDS TO STAR-FORMING GALAXIES: UNIVERSAL PROCESSES?
卷号315期号:8页码:UNSP 99065A
摘要We construct the radially-resolved semi-analytic models of galaxy formation based on the L-Galaxies model framework, which include both atomic and molecular gas phase in ISM. The models run on the halo outputs of Lambda CDM cosmology N-body simulation. Our models can reproduce varies observations of HI gas in nearby galaxies, e.g. the HI mass function, the HI-to-star ratio vs stellar mass and stellar surface density, universal HI radial surface density profile in outer disks etc. We also give the physical origin of HI size-mass relation. Based on our model results for local dwarf galaxies, we show that the "missing satellite problem" also exists in the HI component, i.e., the models over-predict dwarf galaxies with low HI mass around the Milky Way. That is a shortcoming of current Lambda CDM cosmology framework. Future survey for HI gas in local dwarf galaxies (e.g. MeerKAT, SKA & FAST) can help to verify the nature of dark matter (cold or warm).
文献类型期刊论文
条目标识符http://libir.pmo.ac.cn/handle/332002/17050
专题南极天文中心
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Fu, Jian,Wang, Jing,Luo, Yu. HI Gas in Disk and Dwarf Galaxies in the Semi-analytic Models of Galaxy Formation[J]. FROM INTERSTELLAR CLOUDS TO STAR-FORMING GALAXIES: UNIVERSAL PROCESSES?,2016,315(8):UNSP 99065A.
APA Fu, Jian,Wang, Jing,&Luo, Yu.(2016).HI Gas in Disk and Dwarf Galaxies in the Semi-analytic Models of Galaxy Formation.FROM INTERSTELLAR CLOUDS TO STAR-FORMING GALAXIES: UNIVERSAL PROCESSES?,315(8),UNSP 99065A.
MLA Fu, Jian,et al."HI Gas in Disk and Dwarf Galaxies in the Semi-analytic Models of Galaxy Formation".FROM INTERSTELLAR CLOUDS TO STAR-FORMING GALAXIES: UNIVERSAL PROCESSES? 315.8(2016):UNSP 99065A.
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