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Formation and evolution of dwarf elliptical galaxies: Structural and kinematical properties

机译:矮小椭圆星系的形成与演化:结构和运动学性质

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We confront predictions of the currently popular theories for dE formation and evolution with the observed position of dEs in log L_B vs. log σ, log L_B vs. log R_e, log L_B vs. log I_e, and log R_e vs. log I_e diagrams and in the (log σ, log R_e, log I_e) parameter space in which bright and intermediate-luminosity elliptical galaxies and bulges of spirals define a Fundamental Plane (FP). We show that the dE sequences in the various univariate diagrams are disjunct from those traced by bright and intermediate-luminosity elliptical galaxies and bulges of spirals. It appears that semi-analytical models (SAMs) that incorporate quiescent star formation with an essentially z-independent star-formation efficiency, combined with postmerger starbursts and the dynamical response after supernova-driven gas-loss, are able to reproduce the position of the dEs in the various univariate and bivariate diagrams.
机译:我们面对目前流行的理论的预测,以便在日志L_B与日志σ中观察到的des的位置和演变。logσ,log l_b与log r_e,log l_b与log i_e和log r_e与日志i_e图表和log r_e与log i_e图在(logσ,log r_e,log i_e)参数空间中,其中明亮和中间发光度椭圆星系和斜螺旋形螺旋定义基本平面(FP)。我们表明,各种单变量图中的DE序列是由明亮和中间发光度椭圆星系和螺旋纹铺设的那些分离的序列。似乎将静态星形形成的半分析模型(SAMS)具有基本上Z无关的星形形成效率,与Postmerger Starbursts结合和超新加坡驱动的气体损失后的动力响应,能够再现在各种单变量和双变相图中的des。

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