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Optical+Near-IR Analysis of a Newly Confirmed Einstein Ring at z ∼ 1 from the Kilo-Degree Survey: Dark Matter Fraction, Total and Dark Matter Density Slope, and Initial Mass Function

  • Authors: Rui Li, Nicola R. Napolitano, Giuseppe D'Ago, Vyacheslav N. Shalyapin, Kai Zhu, Xiaotong Guo, Ran Li, Léon V. E. Koopmans, Chiara Spiniello, Crescenzo Tortora, Francesco La Barbera, Haicheng Feng, Liang Gao, Zhiqi Huang, Koen Kuijken, Hui Li, Linghua Xie, Mario Radovich, Alexey Sergeyev

Rui Li et al 2025 The Astrophysical Journal Letters 987 .

  • Provider: AAS Journals

Caption: Figure 4.

Left: the relationship between total mass density slope γtot and DM fraction (Salpeter IMF, ﹩{f}_{\mathrm{DM}}^{\mathrm{Salp}}﹩) for the SL2S sample (squares) and of KiDS J0233−3447 by assuming a de Vaucouleurs (circle) and Sérsic (star) foreground light profile. The black dashed line shows the line fit of the SL2S sample. Right: the MCMC inference for DM slope γDM and the stellar mass inside the Reff. The stellar masses inferred from the Chabrier and Salpeter IMFs (also inside the Reff) are shown with blue and green bars, respectively.

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