On the Cooling Flow Problem in the Gaseous Halo of the Milky Way
文献类型：期刊论文
| 作者 | Fang, Xiang-Er2; Guo, Fulai1,3; Yuan, Ye-Fei2 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2020-05-01 |
| 卷号 | 894期号:1页码:11 |
| ISSN号 | 0004-637X |
| 关键词 | Circumgalactic medium Hydrodynamical simulations Galaxy physics the Milky Way Plasma astrophysics Galaxy evolution Cooling flows Galaxy processes |
| DOI | 10.3847/1538-4357/ab846c |
| 英文摘要 | Theoretical and observational arguments suggest that there is a large amount of hot (similar to 10(6) K) diffuse gas residing in the Milky Way (MW) halo, but its total mass and spatial distribution are still unclear. In this work, we present a general model for the gas density distribution in the Galactic halo, and investigate the gas evolution under radiative cooling with a series of 2D hydrodynamic simulations. We find that the mass inflow rate in the developed cooling flow increases with gas metallicity and the total gas mass in the halo. For a fixed halo gas mass, the spatial gas distribution affects the onset time of the cooling catastrophe, which starts earlier when the gas distribution is more centrally peaked, but does not substantially affect the final mass inflow rate. The gravity from the Galactic bulge and disk affects gas properties in the inner regions, but has little effect on the final inflow rate either. We confirm our results by investigating cooling flows in several density models adopted from the literature, including the Navarro-Frenk-White (NFW) model, the cored-NFW model, the Maller & Bullock model, and the beta model. Typical mass inflow rates in our simulations range from similar to 5 M yr(-1) to similar to 60 M yr(-1), and are much higher than the observed star formation rate in our Galaxy, suggesting that stellar and active galactic nucleus feedback processes may play important roles in the evolution of the MW and MW-type galaxies. |
| WOS关键词 | HIGH-VELOCITY CLOUDS ; X-RAY SPECTROSCOPY ; HOT GAS ; LOCAL GROUP ; CLUSTERS ; GALAXIES ; STARS |
| 资助项目 | National Natural Science Foundation of China[11873072] ; National Natural Science Foundation of China[11633006] ; National Natural Science Foundation of China[11725312] ; National Natural Science Foundation of China[11421303] ; Natural Science Foundation of Shanghai[18ZR1447100] ; Chinese Academy of Sciences[QYZDB-SSW-SYS033] ; Chinese Academy of Sciences[QYZDJ-SSW-SYS008] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000531272800001 |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of Shanghai ; Natural Science Foundation of Shanghai ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of Shanghai ; Natural Science Foundation of Shanghai ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of Shanghai ; Natural Science Foundation of Shanghai ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation of Shanghai ; Natural Science Foundation of Shanghai ; Chinese Academy of Sciences ; Chinese Academy of Sciences |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/54947]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Guo, Fulai |
| 作者单位 | 1.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 2.Univ Sci & Technol China, Dept Astron, Key Lab Res Galaxies & Cosmol, Hefei 230026, Anhui, Peoples R China 3.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fang, Xiang-Er,Guo, Fulai,Yuan, Ye-Fei. On the Cooling Flow Problem in the Gaseous Halo of the Milky Way[J]. ASTROPHYSICAL JOURNAL,2020,894(1):11. |
| APA | Fang, Xiang-Er,Guo, Fulai,&Yuan, Ye-Fei.(2020).On the Cooling Flow Problem in the Gaseous Halo of the Milky Way.ASTROPHYSICAL JOURNAL,894(1),11. |
| MLA | Fang, Xiang-Er,et al."On the Cooling Flow Problem in the Gaseous Halo of the Milky Way".ASTROPHYSICAL JOURNAL 894.1(2020):11. |
入库方式： OAI收割
来源：国家天文台
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