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Gas dynamics in NGC 4736
Gu, QS; Liao, XH; Huang, JH; Qu, QY; Su, HJ
1996-10-01
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN0004-6361
Volume314Issue:1Pages:18-24
AbstractNew test-particle simulations have been performed to study the secular evolution of the gaseous distribution in NGC 4736. We find that the distribution of gas clouds can be understood in the frame of perturbation induced by a nuclear oval potential, in addition to a spiral-like potential. Our experiments show that both inner and outer rings are stable structures located at the inner Lindblad resonance (ILR) and the outer Lindblad resonance(OLR), respectively, in agreement with the observations of NGC 4736. One of our-simplified simulations indicates that both nuclear starburst and orbital resonance might be needed for keeping the inner ring stable for a long period. We have introduced a symplectic algorithm in the orbit integration. Its stronger stability allows us to adopt a rather large time step to save computational time. Substitution of a viscous force for cloud-cloud interactions proves adequate in the case of NGC 4736.
KeywordGalaxies, Spiral Galaxies, Kinematics And Dynamics Galaxies, Structure Galaxies, Individual (Ngc 4736) Methods, Numerical
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordSTAR-FORMATION ; SPIRAL STRUCTURE ; GALAXY NGC-4736 ; BAR ; DISKS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:A1996VM33500005
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/8450
Collection期刊(老文献)
AffiliationPURPLE MT OBSERV, NANJING 210008, PEOPLES R CHINA
Recommended Citation
GB/T 7714
Gu, QS,Liao, XH,Huang, JH,et al. Gas dynamics in NGC 4736[J]. ASTRONOMY & ASTROPHYSICS,1996,314(1):18-24.
APA Gu, QS,Liao, XH,Huang, JH,Qu, QY,&Su, HJ.(1996).Gas dynamics in NGC 4736.ASTRONOMY & ASTROPHYSICS,314(1),18-24.
MLA Gu, QS,et al."Gas dynamics in NGC 4736".ASTRONOMY & ASTROPHYSICS 314.1(1996):18-24.
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