History of star formation and chemical enrichment in the Milky Way disk
文献类型：期刊论文
| 作者 | Chang, RX; Shu, CG; Hou, JL |
| 刊名 | CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2002-06-01 |
| 卷号 | 2期号:3页码:226-247 |
| 关键词 | Galaxy : abundance Galaxy : evolution formation Galaxy : star formation |
| 英文摘要 | Based on a physical treatment of the star formation law similar to that given by Efstathiou, we have improved our two-component chemical evolution model for the Milky Way disk. Two gas infall rates are compared, one exponential, one Gaussian. It is shown that the star formation law adopted in this paper depends more strongly on the gas surface density than that in Chang et al. It has large effects on the history of star formation and gas evolution of the whole disk. In the solar neighborhood, the history of chemical evolution and star formation is not sensitive to whether the infall rate is Gaussian or exponential. For the same infall time scale, both forms predict the same behavior for the current properties of the Galactic disk. The model predictions do depend on whether or not the infall time scale varies with the radius, but current available observations cannot decide which case is the more realistic. Our results also show that it would be inadequate to describe the gradient evolution along the Galactic disk by only one word "flatter" or "steeper", as was suggested by Hou et al. and Chiapinni et al. We point out that both the absolute value and the evolution of the abundance gradient may be different in the inner and outer regions. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | H-II REGIONS ; GALACTIC DISK ; ABUNDANCE GRADIENTS ; SPIRAL GALAXIES ; METALLICITY DISTRIBUTION ; SOLAR NEIGHBORHOOD ; WAY DISK ; PLANETARY-NEBULAE ; EVOLUTION ; MODEL |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000176574900005 |
| 公开日期 | 2010-11-08 |
| 源URL | [http://119.78.226.72//handle/331011/11964]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Peking Univ, CAS, Joint Beijing Astron Ctr, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chang, RX,Shu, CG,Hou, JL. History of star formation and chemical enrichment in the Milky Way disk[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2002,2(3):226-247. |
| APA | Chang, RX,Shu, CG,&Hou, JL.(2002).History of star formation and chemical enrichment in the Milky Way disk.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2(3),226-247. |
| MLA | Chang, RX,et al."History of star formation and chemical enrichment in the Milky Way disk".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 2.3(2002):226-247. |
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来源：上海天文台
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