The effects of the variations of turbulence parameters on the observable turbulence statistics
文献类型：期刊论文
| 作者 | Ding SY(丁诗源)1,2
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2016-06-01 |
| 卷号 | 458期号:4页码:3489-3505 |
| 关键词 | turbulence ISM: clouds ISM: kinematics and dynamics ISM: lines and bands ISM: structur. |
| ISSN号 | 0035-8711 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Ding, SY |
| 英文摘要 | In order to study how the statistical properties of the observational quantities of the turbulent molecular cloud models vary with different turbulence parameters, I use the artificially generated random numerical models based on Gaussian fields created by the code PYFC with different values of the 1D density Fourier spectral index beta(n), the turbulence driving parameter, i.e. the b parameter and the 1D Fourier velocity power spectral index beta(upsilon). Then I calculate the line profiles of (CO)-C-13 emission on every sight line. I derive the statistical properties of column density N, line intensity W, peak intensity T-peak and velocity dispersion V-rms on every sight line. I discover that as beta(n) increases, (1) the standard deviations sigma(ln(N/< N >)) and sigma(ln(W/< W >)), of the logarithmic column density ln (N /< N >) and the logarithmic integrated intensity ln (W/< W >) increase; (2) the number of the low T-peak values becomes larger; (3) the probability distribution function (PDF) of v(rms) inclines to left a little. As the b parameter increases, (1) the values of both sigma(ln(N/< N >)) and sigma(ln(W/< W >)) increase; (2) the numbers of both the low T-peak values and the saturated T-peak values become larger; (3) the PDF of v(rms) inclines to left obviously. As beta(upsilon) increases, (1) the PDF of ln (W/< W >) remains generally unchanged; (2) the PDF of T-peak remains generally unchanged; (3) the PDF of V-rms inclines to left obviously. I also discuss the relationship among sigma(N/< N)> Mach number, the b parameter and beta(n). |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | GALACTIC MOLECULAR CLOUDS ; SUPERSONIC ISOTHERMAL TURBULENCE ; MACH NUMBER RELATION ; STAR-FORMATION RATE ; DENSITY PROBABILITY-DISTRIBUTION ; INITIAL MASS FUNCTION ; MODELING CO EMISSION ; INTERSTELLAR TURBULENCE ; MAGNETOHYDRODYNAMIC TURBULENCE ; NUMERICAL SIMULATIONS |
| 收录类别 | SCI |
| 原文出处 | http://mnras.oxfordjournals.org/content/458/4/3489 |
| 语种 | 英语 |
| WOS记录号 | WOS:000375799500009 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/9597]  |
| 专题 | 云南天文台_大样本恒星演化研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan observatories, Chinese Academy of Sciences, PO Box 110, Kunming, 650011 Yunnan Province, People's Republic of China 2.University of the Chinese Academy of Sciences, Yuquan Road 19, Shijingshan Block, 100049 Beijing, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Ding SY. The effects of the variations of turbulence parameters on the observable turbulence statistics[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,458(4):3489-3505. |
| APA | Ding SY.(2016).The effects of the variations of turbulence parameters on the observable turbulence statistics.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,458(4),3489-3505. |
| MLA | Ding SY."The effects of the variations of turbulence parameters on the observable turbulence statistics".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 458.4(2016):3489-3505. |
入库方式： OAI收割
来源：云南天文台
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