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The effects of the variations of turbulence parameters on the observable turbulence statistics
Ding SY(丁诗源)1,2
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2016-06-01
Volume458Issue:4Pages:3489-3505
DOI10.1093/mnras/stw485
Contribution Rank第1完成单位
Indexed BySCI
KeywordTurbulence Ism: Clouds Ism: Kinematics And Dynamics Ism: Lines And bAnds Ism: Structur.
Abstract

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).

Funding ProjectNSFC[11173056]
Funding OrganizationNSFC[11173056]
Language英语
Subject Area天文学 ; 天体物理学 ; 实测天体物理学 ; 恒星与银河系
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherOXFORD UNIV PRESS
Publication PlaceGREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0035-8711
URL查看原文
Archive Date2016-05-12
WOS IDWOS:000375799500009
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordGALACTIC 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
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9597
Collection大样本恒星演化研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorDing SY(丁诗源)
Affiliation1.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
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
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.
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