论文标题
儿童+GAMA：中央和卫星星系校准的弱透镜校准恒星与升级的质量关系
KiDS+GAMA: The weak lensing calibrated stellar-to-halo mass relation of central and satellite galaxies
论文作者
论文摘要
我们通过光谱分类星系的弱透镜分析，同时对中央和卫星星系的恒星至中心质量关系提出限制。 Using overlapping data from the fourth data release of the Kilo-Degree Survey (KiDS), and the Galaxy And Mass Assembly survey (GAMA), we find that satellite galaxies are hosted by halo masses that are $0.53 \pm 0.39$ dex (68\% confidence, $3σ$ detection) smaller than those of central galaxies of the same stellar mass (for a stellar mass of $ \ log（m _ {\ star}/m _ {\ odot}）= 10.6 $）。这与银河系形成模型一致，从而使卫星星系优先剥离了它们的暗物质。当比较来自标准方位角平均的星系 - 果透镜分析和对完整剪切场的二维可能性分析的约束时，我们发现了与类似不确定性的一致结果。由于后一种方法由于晶状体不完整而有些偏见，并且在应用于实际数据时不能对精度提供任何改进，因此我们得出结论，堆叠的切向切剪切测量值最适合用于研究星系 - 霍洛连接。
We simultaneously present constraints on the stellar-to-halo mass relation for central and satellite galaxies through a weak lensing analysis of spectroscopically classified galaxies. Using overlapping data from the fourth data release of the Kilo-Degree Survey (KiDS), and the Galaxy And Mass Assembly survey (GAMA), we find that satellite galaxies are hosted by halo masses that are $0.53 \pm 0.39$ dex (68\% confidence, $3σ$ detection) smaller than those of central galaxies of the same stellar mass (for a stellar mass of $\log(M_{\star}/M_{\odot}) = 10.6$). This is consistent with galaxy formation models, whereby infalling satellite galaxies are preferentially stripped of their dark matter. We find consistent results with similar uncertainties when comparing constraints from a standard azimuthally averaged galaxy-galaxy lensing analysis and a two-dimensional likelihood analysis of the full shear field. As the latter approach is somewhat biased due to the lens incompleteness and as it does not provide any improvement to the precision when applied to actual data, we conclude that stacked tangential shear measurements are best-suited for studies of the galaxy-halo connection.
