论文标题
基本平面不是飞机：早期型星系基本平面的扭曲性质及其对星系形成的影响
The Fundamental Plane Is Not a Plane: Warped Nature of the Fundamental Plane of Early-type Galaxies and Its Implication for Galaxy Formation
论文作者
论文摘要
基于$ 16,283美元的早期星系（ETGS），价格为0.025 \ le z_ \ mathrm {spec} <0.055 $，来自斯隆数字天空调查数据，我们表明，ETG的基本平面（FP）在严格的意义上不是一架具有弯曲的表面，而不是弯曲的表面，其弯曲的表面是扭曲的象征性的，以相位的形式相位，可以使象征性地偏向于弯曲的方向。 （$σ_0$）或半光半径（$μ_e$）内的平均表面亮度更改。当ETG根据$σ_0$将ETG分为子样本时，FP的$μ_e$的系数增加，而FP的零点在较高$σ_0$下降低。以$ z $ band为例，$μ_e$的系数从$ 0.28 $上升到$ 0.36 $，$σ_0$从$ \ sim100 $增加到$ \ sim300 $ km s $ s $^{ - 1} $。同时，FP的零点从$ -7.5 $下降到相同$σ_0$范围的$ -9.0 $。还可以通过检查FP系数的更改的ETG子样本（不同$μ_e$）来达到FP弯曲性质的一致图像。通过检查缩放关系是FP的投影，我们建议FP的扭曲性质可能源自干燥的合并效应，这些效应在质量较高的ETG中更为突出。
Based on $16,283$ early-type galaxies (ETGs) in $0.025\le z_\mathrm{spec}<0.055$ from Sloan Digital Sky Survey data, we show that the fundamental plane (FP) of ETGs is not a plane in the strict sense but is a curved surface with a twisted shape whose orthogonal direction to the surface is shifted as the central velocity dispersion ($σ_0$) or mean surface brightness within the half-light radius ($μ_e$) changes. When ETGs are divided into subsamples according to $σ_0$, the coefficient of $μ_e$ of the FP increases, whereas the zero-point of the FP decreases at higher $σ_0$. Taking the $z$ band as an example, the coefficient of $μ_e$ rises from $0.28$ to $0.36$ as $σ_0$ increases from $\sim100$ to $\sim300$ km s$^{-1}$. At the same time, the zero-point of the FP falls from $-7.5$ to $-9.0$ in the same $σ_0$ range. The consistent picture on the curved nature of the FP is also reached by inspecting changes in the FP coefficients for ETG subsamples with different $μ_e$. By examining scaling relations that are projections of the FP, we suggest that the warped nature of the FP may originate from dry merger effects that are imprinted more prominently in ETGs with higher masses.
