Dissipative phenomena in extended-body interactions. I. Methods: Dwarf galaxies of the Local Group and their synthetic CMDs
Dissipative phenomena in extended-body interactions. I. Methods: Dwarf galaxies of the Local Group and their synthetic CMDs
复制标题
扩展体相互作用中的耗散现象。
DOI：
10.1051/0004-6361/201117612
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发表时间：
2012
影响因子：
6.5
通讯作者：
& Y. Fujita
中科院分区：
文献类型：
--
作者：
S. Pasetto;G. Bertelli;E. K. Grebel;C. Chiosi;& Y. Fujita
目的矮卫星星系围绕宿主星系的轨道演化过程中发生的耗散现象可能在恒星形成活动中留下印记，并在星系恒星含量的彩色星等图中留下印记。我们的目标是对这些复杂的现象作出简单而定性的描述。方法采用分析和数值方法研究分子云中作用于恒星形成过程的公羊压力、开尔文-亥姆霍兹不稳定性、瑞利-泰勒力和潮汐力。我们用合成色星等图技术来考虑它。结果我们开发了一种在两个扩展体相互作用背景下研究气体消耗过程与恒星形成过程之间联系的方法，特别关注了矮星系的动力学状态。
AimsDissipative phenomena occurring during the orbital evolution of a dwarf satellite galaxy around a host galaxy may leave signatures in the star formation activity and signatures in the colour-magnitude diagram of the galaxy stellar content. Our goal is to reach a simple and qualitative description of these complicated phenomena.MethodsWe develop an analytical and numerical technique able to study the ram pressure, Kelvin-Helmholtz instability, Rayleigh-Taylor, and tidal forces acting on the star formation processes in molecular clouds. We consider it with synthetic colour-magnitude diagram techniques.ResultsWe developed a method of investigating the connections between gas consumption processes and star formation processes in the context of the two extended-body interactions, paying special attention to the dwarf galaxies dynamical regime.