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A MaNGA about the Legacy. I. Connecting the Assembly of Stellar Halo with the Average Star Formation History in Low-redshift Massive Galaxies

  • Authors: Xiaoya Zhang, 张 筱雅, Song Huang, 黄 崧, Meng Gu, 顾 梦

Xiaoya Zhang et al 2026 The Astronomical Journal 171 .

  • Provider: AAS Journals

Caption: Figure 4.

The top-left plot shows the sample-split scheme, where galaxies are categorized by position on the ﹩{{\rm{log}}}_{10}({M}_{\star ,R\gt 10\,{\rm{kpc}}}/{M}_{\odot })﹩ vs. ﹩{{\rm{log}}}_{10}({M}_{\star ,R\gt 20\,{\rm{kpc}}}/{M}_{\odot })﹩ plane. The two samples have similar inner stellar masses (M⋆,R<10 kpc); the green circles represent galaxies with more extended outskirts (extended), and the purple diamonds represent more compact galaxies (compact). As before, the total sample is in gray circles. The top-right plot displays the radial profiles of stellar mass density (M kpc–2), with the thick lines representing the median profiles. The green solid lines and purple dashed lines correspond to the extended and compact samples, respectively. The gray-filled bar represents the total sample. Similar to Figure 3, the histograms show the M* (bottom left), σ⋆,cen (bottom middle), and redshift (bottom right). We also show the p-values (with errors from resampling the original sample in their respective uncertainties. For M⋆,R>20 kpc, we assume a 0.1 dex error) of the K-S tests on the M* (bottom left) and σ⋆,cen (bottom middle) distributions between the two subsamples on the first two histograms. The Jupyter notebook for reproducing this figure can be found here: . This repository is also available on Zenodo (https://doi.org/10.5281/zenodo.17979404).

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