Colour gradients of low-redshift galaxies in the DESI Legacy Imaging Survey
Radial colour gradients within galaxies arise from gradients of stellar age, metallicity, and dust reddening. Large samples of colour gradients from wide-area imaging surveys can be used to constrain galaxy formation models. Here we measured colour gradients for low-redshift galaxies using photometr...
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| Veröffentlicht in: | Proceedings of the International Astronomical Union 2021-08, Vol.17 (S373), p.140-142 |
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| container_title | Proceedings of the International Astronomical Union |
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| creator | Liao, Li-Wen Cooper, Andrew P. |
| description | Radial colour gradients within galaxies arise from gradients of stellar age, metallicity, and dust reddening. Large samples of colour gradients from wide-area imaging surveys can be used to constrain galaxy formation models. Here we measured colour gradients for low-redshift galaxies using photometry from the 9th DESI Legacy Imaging Survey (LS), which reaches r ∼ 24 over ∼14,000 deg2. We investigate empirical relationships between colour gradients, M*, and sSFR. We compared our results with the prediction of the Illustris TNG-100 simulation using SDSS mock images. |
| doi_str_mv | 10.1017/S1743921322003805 |
| format | Article |
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| ispartof | Proceedings of the International Astronomical Union, 2021-08, Vol.17 (S373), p.140-142 |
| issn | 1743-9213 1743-9221 |
| language | eng |
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| source | Cambridge University Press Journals Complete |
| subjects | Astronomical models Astronomy Color Cosmic dust Galactic evolution Galaxies Imaging Metallicity Poster Paper Red shift Star & galaxy formation Stars & galaxies Stellar age Trends |
| title | Colour gradients of low-redshift galaxies in the DESI Legacy Imaging Survey |
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