Fractal dimension of the cosmic web with different galaxy types
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arXiv
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| Auteurs principaux: | , , , , , , |
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866915832738611200 |
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| author | Lima, Ana Elisa Soares, Julianne C. Tavares, Ana Carolina S. Taveira, Mariana V. Teles, Sharon Lopes, Amanda R. Ribeiro, Marcelo B. |
| author_facet | Lima, Ana Elisa Soares, Julianne C. Tavares, Ana Carolina S. Taveira, Mariana V. Teles, Sharon Lopes, Amanda R. Ribeiro, Marcelo B. |
| contents | The fractal dimension $D$ is used to map the large-scale galaxy distribution in the Universe by color types: blue, green and red. Using a $NUVrK$-complete COSMOS2020 subsample of 618,952 galaxies observed up to $z=4$, number densities were derived and plotted against two cosmological distance measures, the luminosity and comoving (galaxy area) distances, in order to estimate $D$ for each galaxy color type in two redshift intervals: $z\gtrless1$. We found a general gradient $D_{\mathrm{blue}}> D_{\mathrm{red}}>D_{\mathrm{green}}$ with $D=1.40-2.03$ for $z<1$. For $1<z\leq4$, the gradient changes to $D_{\mathrm{blue}}>D_{\mathrm{green}}>D_{\mathrm{red}}$, and the fractal dimension values are lower, $D=0.03-0.44$. These results suggest that the fractal dimension is a sensitive diagnostic for how galaxy populations trace the evolving cosmic web, and confirm the fractal dimension as a useful tool for observational mapping of large-scale structure by galaxy color. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_05309 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Fractal dimension of the cosmic web with different galaxy types Lima, Ana Elisa Soares, Julianne C. Tavares, Ana Carolina S. Taveira, Mariana V. Teles, Sharon Lopes, Amanda R. Ribeiro, Marcelo B. Cosmology and Nongalactic Astrophysics The fractal dimension $D$ is used to map the large-scale galaxy distribution in the Universe by color types: blue, green and red. Using a $NUVrK$-complete COSMOS2020 subsample of 618,952 galaxies observed up to $z=4$, number densities were derived and plotted against two cosmological distance measures, the luminosity and comoving (galaxy area) distances, in order to estimate $D$ for each galaxy color type in two redshift intervals: $z\gtrless1$. We found a general gradient $D_{\mathrm{blue}}> D_{\mathrm{red}}>D_{\mathrm{green}}$ with $D=1.40-2.03$ for $z<1$. For $1<z\leq4$, the gradient changes to $D_{\mathrm{blue}}>D_{\mathrm{green}}>D_{\mathrm{red}}$, and the fractal dimension values are lower, $D=0.03-0.44$. These results suggest that the fractal dimension is a sensitive diagnostic for how galaxy populations trace the evolving cosmic web, and confirm the fractal dimension as a useful tool for observational mapping of large-scale structure by galaxy color. |
| title | Fractal dimension of the cosmic web with different galaxy types |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2602.05309 |