JWST NIRCam Observations of the Globular Cluster Population of RXJ 2129.7+0005
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866913976464441344 |
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| author | Keatley, Kaitlyn E. Harris, William E. |
| author_facet | Keatley, Kaitlyn E. Harris, William E. |
| contents | We present an analysis of the globular cluster (GC) population in the galaxy cluster RXJ 2129.7+0005 (z = 0.234) based on JWST NIRCam imaging in three filters: F115W, F150W, and F200W. We use this material to provide a detailed look at the color-magnitude distribution of the GCs and their spatial distribution around the central giant galaxy. We identified 3,160 GC candidates brighter than F150W=29.5, and assessed photometric completeness through artificial star tests. We determined that the GCs follow a radial power-law distribution with an index of $1.58 \pm 0.04$, with the redder GCs exhibiting a slightly greater central concentration. Their spatial distribution is also highly elliptical, closely following the shape of the BCG halo light. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2508_03626 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | JWST NIRCam Observations of the Globular Cluster Population of RXJ 2129.7+0005 Keatley, Kaitlyn E. Harris, William E. Astrophysics of Galaxies We present an analysis of the globular cluster (GC) population in the galaxy cluster RXJ 2129.7+0005 (z = 0.234) based on JWST NIRCam imaging in three filters: F115W, F150W, and F200W. We use this material to provide a detailed look at the color-magnitude distribution of the GCs and their spatial distribution around the central giant galaxy. We identified 3,160 GC candidates brighter than F150W=29.5, and assessed photometric completeness through artificial star tests. We determined that the GCs follow a radial power-law distribution with an index of $1.58 \pm 0.04$, with the redder GCs exhibiting a slightly greater central concentration. Their spatial distribution is also highly elliptical, closely following the shape of the BCG halo light. |
| title | JWST NIRCam Observations of the Globular Cluster Population of RXJ 2129.7+0005 |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2508.03626 |