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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2512.12027 |
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| _version_ | 1866911316587839488 |
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| author | Huang, Pei-Jun Dell'Antonio, Ian LaDuca, Philip Escalante, Zacharias Englert, Anthony |
| author_facet | Huang, Pei-Jun Dell'Antonio, Ian LaDuca, Philip Escalante, Zacharias Englert, Anthony |
| contents | We present a new measurement of the half-light radius of the Tucana Dwarf galaxy, based on the combination of wider, deeper imaging conducted as part of the Local Volume Complete Cluster Survey (LoVoCCS) and HST archival images. We obtain a stellar density profile within the Tucana Dwarf field based on elliptical fitting. After background subtraction, we fit a Sérsic profile to the density profile to obtain the half-light radius. We measure the half-light radius to be $0.89_{-0.02}^{+0.06}$ arcmin, corresponding to a value of $R_{e} = 225.7_{-5.5}^{+14.4}$ pc (95% CL). Given the wider-field observations from LoVoCCS used in this analysis, our measurement of the half-light radius represents a $\sim 10 \%$ increased value from the previous results. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_12027 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Measurement of the Half-Light Radius for the Tucana Dwarf Spheroidal Galaxy Huang, Pei-Jun Dell'Antonio, Ian LaDuca, Philip Escalante, Zacharias Englert, Anthony Astrophysics of Galaxies We present a new measurement of the half-light radius of the Tucana Dwarf galaxy, based on the combination of wider, deeper imaging conducted as part of the Local Volume Complete Cluster Survey (LoVoCCS) and HST archival images. We obtain a stellar density profile within the Tucana Dwarf field based on elliptical fitting. After background subtraction, we fit a Sérsic profile to the density profile to obtain the half-light radius. We measure the half-light radius to be $0.89_{-0.02}^{+0.06}$ arcmin, corresponding to a value of $R_{e} = 225.7_{-5.5}^{+14.4}$ pc (95% CL). Given the wider-field observations from LoVoCCS used in this analysis, our measurement of the half-light radius represents a $\sim 10 \%$ increased value from the previous results. |
| title | Measurement of the Half-Light Radius for the Tucana Dwarf Spheroidal Galaxy |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2512.12027 |