Discovery of a Low-mass Strong-lens System in SMACS J0723.3-7327
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arXiv
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| Auteurs principaux: | , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866912346157350912 |
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| author | Deng, Limeng Shu, Yiping Wang, Lei Li, Guoliang Caminha, Gabriel Bartosch Dong, Jiang He, Zizhao Qu, Han Luo, Ruibiao |
| author_facet | Deng, Limeng Shu, Yiping Wang, Lei Li, Guoliang Caminha, Gabriel Bartosch Dong, Jiang He, Zizhao Qu, Han Luo, Ruibiao |
| contents | We report the discovery of an intriguing, low-mass galaxy-scale strong-lens system in the SMACS J0723.3-7327 galaxy cluster. By modeling James Webb Space Telescope imaging and Very Large Telescope Multi-Unit Spectroscopic Explorer spectroscopic data, we find that the lens is cluster member galaxy at $z=0.397$ with an Einstein radius of $0^{\prime \prime}.424$ $\pm$ $0^{\prime \prime}.012$, stellar mass of $M_* = (3.3 \pm 0.8) \times 10^{10} M_\odot$, half-light radius of $\sim 1$ kpc, and central stellar velocity dispersion of $140 \pm 6$ km s$^{-1}$. This lens galaxy is one of the few strong lens galaxies known to date that have stellar mass as low as $M_* \sim 10^{10.5} M_\odot$, offering an exceptional opportunity to peek into the population of low-mass galaxies that has largely remained unexplored in the context of strong-lensing studies. This strong lens system can also assist in assessing the systematic uncertainty in the lens modeling of cluster member galaxies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_02086 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Discovery of a Low-mass Strong-lens System in SMACS J0723.3-7327 Deng, Limeng Shu, Yiping Wang, Lei Li, Guoliang Caminha, Gabriel Bartosch Dong, Jiang He, Zizhao Qu, Han Luo, Ruibiao Astrophysics of Galaxies We report the discovery of an intriguing, low-mass galaxy-scale strong-lens system in the SMACS J0723.3-7327 galaxy cluster. By modeling James Webb Space Telescope imaging and Very Large Telescope Multi-Unit Spectroscopic Explorer spectroscopic data, we find that the lens is cluster member galaxy at $z=0.397$ with an Einstein radius of $0^{\prime \prime}.424$ $\pm$ $0^{\prime \prime}.012$, stellar mass of $M_* = (3.3 \pm 0.8) \times 10^{10} M_\odot$, half-light radius of $\sim 1$ kpc, and central stellar velocity dispersion of $140 \pm 6$ km s$^{-1}$. This lens galaxy is one of the few strong lens galaxies known to date that have stellar mass as low as $M_* \sim 10^{10.5} M_\odot$, offering an exceptional opportunity to peek into the population of low-mass galaxies that has largely remained unexplored in the context of strong-lensing studies. This strong lens system can also assist in assessing the systematic uncertainty in the lens modeling of cluster member galaxies. |
| title | Discovery of a Low-mass Strong-lens System in SMACS J0723.3-7327 |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2503.02086 |